/* ==========================================================================
   YASIR KHAN — PREMIUM PORTFOLIO STYLES
   Full Stack App Developer | AWS | Zero Cost Deployment
   ========================================================================== */

/* ==========================================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ========================================================================== */
:root {
  /* Colors — Dark Theme (Default) */
  --bg-primary: #050505;
  --bg-secondary: #0a0a0a;
  --bg-tertiary: #141414;
  --bg-card: #0f0f0f;
  --bg-card-hover: #1a1a1a;
  --bg-input: #0a0a0a;
  --bg-header: rgba(5, 5, 5, 0.85);
  --bg-header-scrolled: rgba(5, 5, 5, 0.95);
  
  --fg-primary: #fcfcfc;
  --fg-secondary: #a3a3a3;
  --fg-tertiary: #737373;
  --fg-muted: #525252;
  --fg-inverse: #050505;
  
  --accent-primary: #d4af37;
  --accent-primary-dim: rgba(212, 175, 55, 0.15);
  --accent-secondary: #f3e5ab;
  --accent-secondary-dim: rgba(243, 229, 171, 0.15);
  --accent-tertiary: #ffffff;
  --accent-tertiary-dim: rgba(255, 255, 255, 0.15);
  --accent-danger: #ef4444;
  --accent-danger-dim: rgba(239, 68, 68, 0.15);
  
  --border-primary: #262626;
  --border-secondary: #404040;
  --border-focus: #d4af37;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #d4af37 0%, #aa8c2c 100%);
  --gradient-secondary: linear-gradient(135deg, #f3e5ab 0%, #d4af37 100%);
  --gradient-tertiary: linear-gradient(135deg, #ffffff 0%, #a3a3a3 100%);
  --gradient-card: linear-gradient(145deg, #0f0f0f 0%, #141414 100%);
  --gradient-glow: radial-gradient(ellipse at center, rgba(212, 175, 55, 0.15) 0%, transparent 70%);
  --gradient-hero: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(212, 175, 55, 0.08) 0%, transparent 60%),
                    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(243, 229, 171, 0.06) 0%, transparent 50%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(212, 175, 55, 0.2);
  --shadow-glow-secondary: 0 0 40px rgba(243, 229, 171, 0.2);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.4);
  
  /* Typography */
  --font-display: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-ui: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */
  --text-7xl: 4.5rem;    /* 72px */
  
  --leading-tight: 1.1;
  --leading-snug: 1.375;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
  
  /* Spacing */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */
  
  /* Border Radius */
  --radius-sm: 0.375rem;   /* 6px */
  --radius-md: 0.5rem;     /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-2xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Z-Index */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;
  
  /* Container */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
  
  /* Header Height */
  --header-height: 80px;
}

/* Light Theme (Optional - for prefers-color-scheme) */
@media (prefers-color-scheme: light) {
  :root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-input: #ffffff;
    --bg-header: rgba(248, 250, 252, 0.85);
    --bg-header-scrolled: rgba(248, 250, 252, 0.95);
    
    --fg-primary: #0f172a;
    --fg-secondary: #475569;
    --fg-tertiary: #64748b;
    --fg-muted: #94a3b8;
    --fg-inverse: #ffffff;
    
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  }
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  max-width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--fg-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  max-width: 100%;
}

::selection {
  background: var(--accent-primary);
  color: var(--fg-inverse);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-secondary);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--fg-tertiary);
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Links */
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-primary);
}

/* Images */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Forms */
input, textarea, select, button {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

/* Utility Classes */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 1024px) {
  .container { padding: 0 var(--space-8); }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-secondary {
  background: var(--gradient-secondary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   BACKGROUND CANVAS & EFFECTS
   ========================================================================== */
.bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: -1;
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.cursor-glow.active {
  opacity: 1;
}

/* ==========================================================================
   HEADER / NAVIGATION
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: var(--z-fixed);
  background: var(--bg-header);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-primary);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
  background: var(--bg-header-scrolled);
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--fg-primary);
}

.nav-logo:hover {
  color: var(--accent-primary);
}

/* 3D Rotating Logo */
.logo-3d-wrapper {
  perspective: 800px;
  width: 40px;
  height: 40px;
  margin-right: 8px;
}

.logo-3d-coin {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  animation: spin3d 4s linear infinite;
}

.logo-3d-front,
.logo-3d-back {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  backface-visibility: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 800;
  color: var(--fg-inverse);
  background: var(--gradient-primary);
  border: 2px solid var(--accent-secondary);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5), 0 0 10px var(--accent-primary);
}

.logo-3d-back {
  transform: rotateY(180deg);
  background: var(--gradient-secondary);
}

@keyframes spin3d {
  0% { transform: rotateY(0deg); }
  100% { transform: rotateY(360deg); }
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav-link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--fg-secondary);
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
  color: var(--fg-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
}

.nav-toggle:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-secondary);
}

.hamburger {
  position: relative;
  width: 24px;
  height: 2px;
  background: var(--fg-primary);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--fg-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base);
}

.hamburger::before { top: -7px; }
.hamburger::after { bottom: -7px; }

.nav-toggle[aria-expanded="true"] .hamburger {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Nav Overlay */
@media (max-width: 767px) {
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-12);
    gap: var(--space-6);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
    transform: translateX(100%);
    transition: transform var(--transition-spring);
    z-index: var(--z-fixed);
  }
  
  .nav-links.open {
    transform: translateX(0);
  }
  
  .nav-link {
    font-size: var(--text-xl);
    padding: var(--space-3) 0;
  }
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + var(--space-16)) 0 var(--space-24);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  pointer-events: none;
  z-index: -1;
}

.hero-grid {
  display: grid;
  gap: var(--space-12);
  align-items: center;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }
}

.hero-content { position: relative; min-width: 0; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--accent-primary-dim);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--accent-primary);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.8s var(--transition-spring);
}

.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.9); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-4xl), 6vw, var(--text-7xl));
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

.title-line {
  display: block;
}

.title-accent { color: var(--fg-secondary); }

.title-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl));
  line-height: var(--leading-relaxed);
  color: var(--fg-secondary);
  max-width: 600px;
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.8s var(--transition-spring) 0.1s both;
}

.hero-subtitle strong { color: var(--fg-primary); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.8s var(--transition-spring) 0.2s both;
}

@media (min-width: 640px) {
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
}

.stat { text-align: center; }

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
  animation: fadeInUp 0.8s var(--transition-spring) 0.3s both;
}

.hero-trust {
  animation: fadeInUp 0.8s var(--transition-spring) 0.4s both;
}

.trust-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  margin-bottom: var(--space-3);
}

.trust-logos {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.trust-logo {
  padding: var(--space-2) var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--fg-secondary);
  transition: all var(--transition-fast);
  cursor: default;
}

.trust-logo:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.trust-logo::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--fg-secondary);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  z-index: var(--z-tooltip);
  margin-bottom: var(--space-2);
}

.trust-logo:hover::after {
  opacity: 1;
  visibility: visible;
}

/* Hero Visual */
.hero-visual { position: relative; min-width: 0; }

.visual-card {
  position: relative;
  background: var(--gradient-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  min-width: 0;
}

.visual-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.card-glow {
  position: absolute;
  inset: 0;
  background: var(--gradient-glow);
  opacity: 0;
  transition: opacity var(--transition-slow);
  pointer-events: none;
}

.visual-card:hover .card-glow { opacity: 1; }

.card-content { padding: var(--space-6); }

.primary-card { margin-bottom: var(--space-6); }

.code-editor {
  background: var(--bg-input);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-4);
  min-width: 0;
}

.editor-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-primary);
}

.editor-dots {
  display: flex;
  gap: var(--space-1);
}

.editor-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border-secondary);
}

.editor-dots span:nth-child(1) { background: #ff5f57; }
.editor-dots span:nth-child(2) { background: #ffbd2e; }
.editor-dots span:nth-child(3) { background: #28ca42; }

.editor-title {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
}

.editor-code {
  padding: var(--space-4);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--fg-primary);
}

.editor-code .keyword { color: #c678dd; }
.editor-code .string { color: #98c379; }
.editor-code .function { color: #61afef; }
.editor-code .comment { color: #5c6370; font-style: italic; }

.terminal-output {
  background: var(--bg-input);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-width: 0;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-primary);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.prompt { color: var(--accent-primary); }
.command { color: var(--fg-secondary); }

.terminal-lines {
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 2;
  color: var(--fg-secondary);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-lines .success { color: #28ca42; }
.terminal-lines .highlight { color: var(--fg-primary); font-weight: 600; }

.secondary-card, .tertiary-card {
  padding: var(--space-5);
}

.metric-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.metric { text-align: center; }

.metric-value {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--fg-primary);
  margin-bottom: var(--space-1);
}

.metric-label {
  font-size: var(--text-xs);
  color: var(--fg-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-badge {
  padding: var(--space-1) var(--space-3);
  background: var(--accent-primary-dim);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent-primary);
  transition: all var(--transition-fast);
}

.tech-badge:hover {
  background: var(--accent-primary);
  color: var(--fg-inverse);
  transform: translateY(-1px);
}

/* Scroll Indicator */
.hero-scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--fg-tertiary);
  font-size: var(--text-sm);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

@media (max-width: 1023px) {
  .hero-scroll { display: none; }
}

/* ==========================================================================
   SECTION COMMON STYLES
   ========================================================================== */
section { position: relative; }

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-16);
}

.section-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-4);
  background: var(--accent-primary-dim);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
}

/* ==========================================================================
   REVEAL ANIMATIONS
   ========================================================================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--transition-spring), transform 0.8s var(--transition-spring);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal="reveal-left"] { transform: translateX(-40px); }
[data-reveal="reveal-right"] { transform: translateX(40px); }
[data-reveal="reveal-scale"] { transform: scale(0.95); }

[data-reveal="reveal-left"].revealed,
[data-reveal="reveal-right"].revealed,
[data-reveal="reveal-scale"].revealed {
  transform: translateX(0) scale(1);
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about {
  padding: var(--space-24) 0;
  background: var(--bg-secondary);
}

.about::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

.about-grid {
  display: grid;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.about-text p {
  margin-bottom: var(--space-6);
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
}

.about-text strong { color: var(--fg-primary); }

.about-highlights {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.highlight-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.highlight-item:hover {
  border-color: var(--accent-primary);
  transform: translateX(4px);
}

.highlight-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent-primary-dim);
  border-radius: var(--radius-lg);
  color: var(--accent-primary);
}

.highlight-item h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.highlight-item p {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  margin: 0;
}

/* Experience Timeline */
.about-experience { position: relative; }

.experience-timeline {
  position: relative;
  padding-left: var(--space-8);
}

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-full);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-10);
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -20px;
  top: 4px;
  width: 24px;
  height: 24px;
  background: var(--bg-primary);
  border: 3px solid var(--accent-primary);
  border-radius: 50%;
  z-index: 1;
  box-shadow: 0 0 0 4px var(--bg-secondary);
}

.timeline-item::before {
  content: attr(data-year);
  position: absolute;
  left: -80px;
  top: 4px;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--fg-tertiary);
  white-space: nowrap;
}

@media (max-width: 1023px) {
  .timeline-item::before {
    position: static;
    display: block;
    margin-bottom: var(--space-2);
    color: var(--accent-primary);
  }
}

.timeline-content h5 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.timeline-content p {
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
}

/* Floating Stats */
.floating-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-10);
  padding: var(--space-6);
  background: var(--gradient-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
}

.float-stat { text-align: center; }

.float-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-1);
}

.float-label {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  font-weight: 500;
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills {
  padding: var(--space-24) 0;
}

.skills-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(3, 1fr); }
}

.skill-category {
  padding: var(--space-8);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.skill-category:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-title {
  display: flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-6);
  color: var(--fg-primary);
}

.skill-items { display: grid; gap: var(--space-4); }

.skill-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: default;
}

.skill-item:hover {
  border-color: var(--accent-primary);
  background: var(--bg-card);
}

.skill-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
}

.skill-icon.react { background: rgba(97, 218, 251, 0.15); color: #61dafb; }
.skill-icon.react-native { background: rgba(97, 218, 251, 0.15); color: #61dafb; }
.skill-icon.typescript { background: rgba(49, 120, 198, 0.15); color: #3178c6; }
.skill-icon.tailwind { background: rgba(56, 189, 248, 0.15); color: #38bdf8; }
.skill-icon.framer { background: rgba(255, 84, 104, 0.15); color: #ff5468; }
.skill-icon.node { background: rgba(102, 187, 106, 0.15); color: #66bb6a; }
.skill-icon.postgres { background: rgba(51, 103, 153, 0.15); color: #336799; }
.skill-icon.redis { background: rgba(220, 57, 45, 0.15); color: #dc392d; }
.skill-icon.graphql { background: rgba(233, 99, 174, 0.15); color: #e963ae; }
.skill-icon.websocket { background: rgba(156, 39, 176, 0.15); color: #9c27b0; }
.skill-icon.aws { background: rgba(255, 153, 0, 0.15); color: #ff9900; }
.skill-icon.docker { background: rgba(0, 123, 195, 0.15); color: #007bbb; }
.skill-icon.github { background: rgba(255, 255, 255, 0.1); color: #fff; }
.skill-icon.terraform { background: rgba(100, 74, 192, 0.15); color: #644ac0; }
.skill-icon.monitoring { background: rgba(239, 68, 68, 0.15); color: #ef4444; }

.skill-item span:not(.skill-icon):not(.skill-bar) {
  font-weight: 500;
  color: var(--fg-primary);
}

.skill-level {
  flex: 1;
  height: 6px;
  background: var(--bg-input);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-bar {
  height: 100%;
  width: 0;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width 1.5s var(--transition-spring);
}

.skill-item:hover .skill-bar { width: var(--level); }

/* Tooltip for skills */
.skill-item[data-tooltip] { position: relative; }

.skill-item[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--fg-secondary);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  z-index: var(--z-tooltip);
  margin-bottom: var(--space-2);
}

.skill-item[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects {
  padding: var(--space-24) 0;
  background: var(--bg-secondary);
}

.projects::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

.projects-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-12);
}

.filter-btn {
  padding: var(--space-2) var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--fg-secondary);
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.filter-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--fg-inverse);
  box-shadow: var(--shadow-glow);
}

.projects-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1200px) {
  .projects-grid { grid-template-columns: repeat(3, 1fr); }
}

.project-card {
  position: relative;
  background: var(--gradient-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

.project-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.project-card.hidden { display: none; }

.project-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
  transform: scale(1.05);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(10, 15, 26, 0.95) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-6);
}

.project-card:hover .project-overlay { opacity: 1; }

.project-links {
  display: flex;
  gap: var(--space-3);
  width: 100%;
  justify-content: flex-start;
}

.project-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--fg-secondary);
  transition: all var(--transition-fast);
}

.project-link:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--fg-inverse);
  transform: translateY(-2px);
}

.project-content {
  padding: var(--space-6);
}

.project-category {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--accent-primary-dim);
  border: 1px solid rgba(0, 212, 170, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.project-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--fg-primary);
}

.project-description {
  font-size: var(--text-sm);
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tech-tag {
  padding: var(--space-1) var(--space-2);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--fg-tertiary);
  transition: all var(--transition-fast);
}

.tech-tag:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-primary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--fg-tertiary);
}

.meta-item svg { width: 14px; height: 14px; }

/* Nested Projects */
.nested-projects {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-primary);
}

.nested-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--fg-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-3);
}

.nested-list {
  display: grid;
  gap: var(--space-2);
}

.nested-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--fg-secondary);
  transition: all var(--transition-fast);
}

.nested-item:hover {
  border-color: var(--accent-secondary);
  color: var(--accent-secondary);
  background: var(--accent-secondary-dim);
}

.nested-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-secondary);
}

/* ==========================================================================
   CTA SECTION
   ========================================================================== */
.cta {
  padding: var(--space-24) 0;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  pointer-events: none;
}

.cta-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}

.cta-subtitle {
  font-size: var(--text-lg);
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.cta-guarantee {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-6);
}

.guarantee-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--fg-secondary);
  transition: all var(--transition-fast);
}

.guarantee-item:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.guarantee-item svg {
  flex-shrink: 0;
  color: var(--accent-primary);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact {
  padding: var(--space-24) 0;
  background: var(--bg-secondary);
}

.contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

.contact-grid {
  display: grid;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.contact-info { display: grid; gap: var(--space-4); }

.contact-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.contact-card:hover {
  border-color: var(--accent-primary);
  transform: translateX(4px);
}

.contact-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--accent-primary-dim);
  border-radius: var(--radius-lg);
  color: var(--accent-primary);
}

.contact-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.contact-link {
  display: block;
  font-weight: 500;
  color: var(--fg-primary);
  margin-bottom: var(--space-1);
  transition: color var(--transition-fast);
}

.contact-link:hover { color: var(--accent-primary); }

.contact-note {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  margin: 0;
}

/* Contact Form */
.contact-form-wrapper {
  padding: var(--space-8);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
}

.contact-form { display: grid; gap: var(--space-5); }

.form-group { position: relative; }

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--fg-secondary);
  margin-bottom: var(--space-2);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-input);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--fg-primary);
  transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--fg-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-primary-dim);
  outline: none;
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-border {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.form-group:focus-within .form-border { width: 100%; }

.btn-full { width: 100%; }

.form-note {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--fg-tertiary);
  margin: 0;
}

.form-note a { color: var(--accent-primary); }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-large { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }

.btn-primary {
  background: var(--gradient-primary);
  color: var(--fg-inverse);
  border: none;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  color: var(--fg-primary);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--bg-card-hover);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-secondary);
  color: var(--fg-secondary);
}

.btn-outline:hover:not(:disabled) {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background: var(--accent-primary-dim);
}

.btn-loader {
  display: none;
  animation: spin 1s linear infinite;
}

.btn.loading .btn-text { display: none; }
.btn.loading .btn-loader { display: block; }

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  background: var(--bg-primary);
  border-top: 1px solid var(--border-primary);
}

.footer-grid {
  display: grid;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 3fr;
  }
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--fg-primary);
  margin-bottom: var(--space-4);
}

.footer-tagline {
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--fg-tertiary);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--fg-inverse);
  transform: translateY(-2px);
}

.footer-links {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 640px) {
  .footer-links { grid-template-columns: repeat(3, 1fr); }
}

.footer-column h4 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--fg-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.footer-column ul { list-style: none; display: grid; gap: var(--space-2); }

.footer-column a {
  font-size: var(--text-sm);
  color: var(--fg-secondary);
  transition: color var(--transition-fast);
}

.footer-column a:hover { color: var(--accent-primary); }

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-primary);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}

.copyright {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
}

.footer-note {
  font-size: var(--text-sm);
  color: var(--fg-muted);
}

/* ==========================================================================
   TOAST NOTIFICATIONS
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  z-index: var(--z-toast);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  animation: slideInRight 0.4s var(--transition-spring);
  min-width: 300px;
  max-width: 450px;
}

.toast.success { border-left: 4px solid #28ca42; }
.toast.error { border-left: 4px solid #ef4444; }
.toast.info { border-left: 4px solid var(--accent-primary); }

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.toast.success .toast-icon { color: #28ca42; }
.toast.error .toast-icon { color: #ef4444; }
.toast.info .toast-icon { color: var(--accent-primary); }

.toast-message {
  flex: 1;
  font-size: var(--text-sm);
  color: var(--fg-primary);
  line-height: var(--leading-snug);
}

.toast-close {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  color: var(--fg-tertiary);
  transition: all var(--transition-fast);
}

.toast-close:hover {
  background: var(--bg-tertiary);
  color: var(--fg-primary);
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}

.toast.removing { animation: slideOutRight 0.3s var(--transition-base) forwards; }

@keyframes slideOutRight {
  to { opacity: 0; transform: translateX(100%); }
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ==========================================================================
   PROJECT DETAIL PAGES
   ========================================================================== */
.project-detail {
  padding: calc(var(--header-height) + var(--space-12)) 0 var(--space-20);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--fg-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-8);
  transition: all var(--transition-fast);
}

.back-link:hover {
  color: var(--accent-primary);
  gap: var(--space-3);
}

.back-link svg {
  flex-shrink: 0;
}

.project-hero {
  margin-bottom: var(--space-16);
}

.project-hero-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--fg-secondary);
  margin-bottom: var(--space-4);
}

.project-hero-title {
  font-size: var(--text-5xl);
  font-weight: 800;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-6);
  background: linear-gradient(135deg, var(--fg-primary) 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.project-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.project-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
}

.project-hero-meta svg {
  color: var(--accent-primary);
}

.project-hero-desc {
  font-size: var(--text-lg);
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
  max-width: 800px;
  margin-bottom: var(--space-8);
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.project-section {
  margin-bottom: var(--space-16);
}

.project-section-title {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--fg-primary);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--accent-primary);
}

.project-section-title svg {
  color: var(--accent-primary);
  flex-shrink: 0;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
}

.meta-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  transition: all var(--transition-base);
}

.meta-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.meta-value {
  display: block;
  font-size: var(--text-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.meta-label {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  font-weight: 500;
}

.tech-showcase {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tech-showcase .tech-tag {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  color: var(--fg-secondary);
}

.tech-showcase .tech-tag:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.nested-projects {
  margin-top: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-primary);
}

.nested-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--fg-primary);
  margin-bottom: var(--space-6);
}

.nested-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-4);
}

.nested-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.nested-item:hover {
  border-color: var(--accent-primary);
  transform: translateX(4px);
}

.nested-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--accent-primary);
}

.nested-item strong {
  display: block;
  color: var(--fg-primary);
  margin-bottom: var(--space-1);
}

.nested-item span {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  line-height: var(--leading-snug);
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.module-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

.module-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.module-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  color: var(--bg-primary);
}

.module-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--fg-primary);
  margin-bottom: var(--space-2);
}

.module-card p {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  line-height: var(--leading-relaxed);
}

.architecture-diagram {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  overflow-x: auto;
}

.architecture-diagram img,
.architecture-diagram svg {
  max-width: 100%;
  height: auto;
}

.architecture-diagram p {
  margin-top: var(--space-4);
  color: var(--fg-tertiary);
  font-size: var(--text-sm);
}

.challenge-solution {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.challenge-card,
.solution-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.challenge-card {
  border-left: 4px solid var(--accent-error);
}

.solution-card {
  border-left: 4px solid var(--accent-success);
}

.challenge-card h3,
.solution-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--fg-primary);
  margin-bottom: var(--space-2);
}

.challenge-card p,
.solution-card p {
  font-size: var(--text-sm);
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
}

/* ==========================================================================
   WHATSAPP FLOATING BUTTON
   ========================================================================== */
.whatsapp-float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 40px;
  right: 40px;
  background-color: #25d366;
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  font-size: 30px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl), 0 0 20px rgba(37, 211, 102, 0.5);
  color: #FFF;
}

@media (max-width: 767px) {
  .whatsapp-float {
    width: 50px;
    height: 50px;
    bottom: 20px;
    right: 20px;
    font-size: 26px;
  }
}

  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

.challenge-card h3 {
  color: var(--accent-error);
}

.solution-card h3 {
  color: var(--accent-success);
}

.challenge-card p,
.solution-card p {
  color: var(--fg-secondary);
  line-height: var(--leading-relaxed);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-6);
}

.result-item {
  text-align: center;
  padding: var(--space-6);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}

.result-item:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}

.result-value {
  font-size: var(--text-4xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.result-label {
  font-size: var(--text-sm);
  color: var(--fg-tertiary);
  font-weight: 500;
}

/* ==========================================================================
   RESPONSIVE ADJUSTMENTS
   ========================================================================== */
@media (max-width: 1023px) {
  .hero { padding-top: calc(var(--header-height) + var(--space-10)); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  :root {
    --header-height: 70px;
  }
  
  .hero { padding: calc(var(--header-height) + var(--space-8)) 0 var(--space-16); }
  .about, .skills, .projects, .cta, .contact { padding: var(--space-16) 0; }
  .toast { min-width: 0; width: 100%; max-width: calc(100vw - var(--space-8)); }
  .toast-container { right: var(--space-4); left: var(--space-4); bottom: var(--space-4); }
  .hero-title { font-size: var(--text-4xl); }
  .hero-stats { gap: var(--space-4); }
  .stat-number { font-size: var(--text-3xl); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  
  .section-title { font-size: var(--text-3xl); }
  
  .skills-grid { grid-template-columns: 1fr; }
  
  .projects-grid { grid-template-columns: 1fr; }
  
  .cta-guarantee { flex-direction: column; align-items: center; }
  .guarantee-item { width: 100%; justify-content: center; }
  
  .contact-form-wrapper { padding: var(--space-6); }
  
  .floating-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--space-4); }
  
  .hero-title { font-size: var(--text-3xl); }
  .hero-subtitle { font-size: var(--text-base); }
  
  .stat-number { font-size: var(--text-2xl); }
  
  .trust-logos { justify-content: center; }
  
  .filter-btn { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }
  
  .project-meta { flex-direction: column; gap: var(--space-2); }
  
  .float-number { font-size: var(--text-2xl); }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */
@media print {
  .header, .hero-scroll, .btn, .contact-form, .footer-social, .cta-actions,
  .bg-canvas, .cursor-glow, .toast-container { display: none !important; }
  
  body { background: white; color: black; }
  
  .hero, .about, .skills, .projects, .cta, .contact {
    page-break-inside: avoid;
    background: white !important;
  }
  
  a { color: black !important; text-decoration: underline; }
  
  .project-card { break-inside: avoid; }
}

/* ==========================================================================
   HIGH CONTRAST MODE
   ========================================================================== */
@media (prefers-contrast: high) {
  :root {
    --border-primary: currentColor;
    --border-secondary: currentColor;
    --fg-secondary: currentColor;
    --fg-tertiary: currentColor;
  }
  
  .btn-primary { border: 2px solid currentColor; }
  .filter-btn.active { border: 2px solid currentColor; }
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .hero-scroll { animation: none; }
  .badge-dot { animation: none; }
  .skill-bar { transition: none; }
}