/* ==========================================================================
   Modern Developer Portfolio - Design System & Stylesheet
   Author: Alex Morgan
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Theme Variables
   -------------------------------------------------------------------------- */
:root {
  /* Fonts */
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Color Palette - Dark Theme (Default) */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-tertiary: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-glass: rgba(15, 23, 42, 0.65);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;       /* Indigo */
  --accent-secondary: #06b6d4;     /* Cyan */
  --accent-tertiary: #ec4899;      /* Pink */
  
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #06b6d4 100%);
  --gradient-accent: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-text: linear-gradient(135deg, #a5b4fc 0%, #38bdf8 50%, #818cf8 100%);

  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.4);

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 35px rgba(99, 102, 241, 0.25);

  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  --border-radius-sm: 8px;
  --border-radius-md: 14px;
  --border-radius-lg: 20px;
  --border-radius-full: 9999px;

  --nav-height: 76px;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-glass: rgba(255, 255, 255, 0.8);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --accent-primary: #4f46e5;
  --accent-secondary: #0891b2;
  --accent-tertiary: #db2777;

  --gradient-primary: linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);
  --gradient-accent: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(241, 245, 249, 0.6) 100%);
  --gradient-text: linear-gradient(135deg, #312e81 0%, #0284c7 100%);

  --border-color: rgba(15, 23, 42, 0.08);
  --border-hover: rgba(79, 70, 229, 0.4);

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 35px rgba(79, 70, 229, 0.15);
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  outline: none;
}

/* --------------------------------------------------------------------------
   3. Utilities & Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-secondary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-subtitle {
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.section-line {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-full);
  margin: 0.75rem auto 0;
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--border-radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse 1.8s infinite cubic-bezier(0.66, 0, 0, 1);
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.65rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.55rem 1.2rem;
  font-size: 0.875rem;
  border-radius: var(--border-radius-sm);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.08);
  color: var(--accent-primary);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   4. Header & Navigation
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 1000;
  transition: all var(--transition-normal);
  background: transparent;
}

.header.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

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

.logo {
  font-size: 1.45rem;
  font-weight: 800;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  letter-spacing: -0.5px;
}

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

.logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-full);
  transition: width var(--transition-normal);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-cta-mobile {
  display: none;
}

/* Theme Toggle Button */
.theme-toggle {
  width: 42px;
  height: 42px;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 1.1rem;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.theme-toggle:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: rotate(15deg);
}

[data-theme="dark"] .sun-icon {
  display: block;
}
[data-theme="dark"] .moon-icon {
  display: none;
}
[data-theme="light"] .sun-icon {
  display: none;
}
[data-theme="light"] .moon-icon {
  display: block;
}

/* Mobile Hamburger Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle .bar {
  height: 2px;
  width: 100%;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

.menu-toggle.active .bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.menu-toggle.active .bar:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active .bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 2rem);
  padding-bottom: 4rem;
  position: relative;
  overflow: hidden;
}

.hero-bg-glow {
  position: absolute;
  top: 15%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 70%);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-badge {
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 2.2rem;
  display: flex;
  align-items: center;
}

.typing-text {
  color: var(--accent-secondary);
  font-weight: 700;
  margin-left: 0.4rem;
}

.cursor {
  display: inline-block;
  width: 3px;
  background-color: var(--accent-secondary);
  margin-left: 2px;
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2.2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.socials-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 1.05rem;
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.social-link:hover {
  color: #ffffff;
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(99, 102, 241, 0.4);
}

/* Hero Visual / Avatar */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.avatar-wrapper {
  position: relative;
  width: 340px;
  height: 340px;
}

.avatar-glow {
  position: absolute;
  inset: -15px;
  background: var(--gradient-primary);
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  filter: blur(25px);
  opacity: 0.45;
  animation: morphGlow 8s ease-in-out infinite;
  z-index: 1;
}

.avatar-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: var(--gradient-primary);
  z-index: 2;
  opacity: 0.9;
}

.avatar-img-box {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--bg-primary);
  z-index: 3;
  box-shadow: var(--shadow-lg);
}

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

.avatar-img-box:hover .avatar-img {
  transform: scale(1.05);
}

/* Floating Badges */
.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.2rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  z-index: 10;
  animation: float 4s ease-in-out infinite;
}

.floating-badge.badge-1 {
  top: 10%;
  left: -25px;
  animation-delay: 0s;
}

.floating-badge.badge-2 {
  bottom: 10%;
  right: -25px;
  animation-delay: 2s;
}

.floating-badge-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.code-icon {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
}

.rocket-icon {
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
}

.floating-badge-text {
  display: flex;
  flex-direction: column;
}

.badge-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.badge-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

@keyframes morphGlow {
  0%, 100% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    transform: rotate(0deg);
  }
  50% {
    border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
    transform: rotate(180deg);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* --------------------------------------------------------------------------
   6. About Section
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}

.about-lead {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.about-body {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1rem;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.75rem;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
}

.highlight-icon {
  color: var(--accent-secondary);
}

/* Stats Card */
.stats-card {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.stats-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
}

.stat-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  padding: 0.75rem;
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  font-family: var(--font-mono);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-plus {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-left: 2px;
}

.stat-label {
  width: 100%;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 0.35rem;
}

/* --------------------------------------------------------------------------
   7. Skills Section
   -------------------------------------------------------------------------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}

.skill-category-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.skill-category-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.category-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.category-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
}

.icon-frontend {
  background: rgba(99, 102, 241, 0.15);
  color: #6366f1;
}

.icon-backend {
  background: rgba(6, 182, 212, 0.15);
  color: #06b6d4;
}

.icon-devops {
  background: rgba(236, 72, 153, 0.15);
  color: #ec4899;
}

.icon-tools {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
}

.category-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.category-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-full);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.skill-tag:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.12);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   8. Projects Section
   -------------------------------------------------------------------------- */
.project-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.55rem 1.35rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--gradient-primary);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

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

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

.project-img-wrapper {
  position: relative;
  width: 100%;
  height: 220px;
  overflow: hidden;
}

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

.project-card:hover .project-img {
  transform: scale(1.08);
}

.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(9, 13, 22, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.btn-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
  transform: scale(0.8);
  transition: all var(--transition-normal);
}

.project-card:hover .btn-icon {
  transform: scale(1);
}

.btn-icon:hover {
  transform: scale(1.1) !important;
}

.project-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.project-cat {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--accent-secondary);
}

.project-year {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.project-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  line-height: 1.35;
}

.project-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.55;
}

.project-tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.5rem;
  margin-top: auto;
}

.tech-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.project-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-primary);
  transition: gap var(--transition-fast);
}

.project-link-btn:hover {
  gap: 0.75rem;
  color: var(--accent-secondary);
}

.project-external-links {
  display: flex;
  gap: 0.75rem;
}

.ext-link {
  font-size: 1.1rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.ext-link:hover {
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   9. Experience & Timeline Section
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary), transparent);
}

.timeline-item {
  position: relative;
  padding-left: 55px;
  margin-bottom: 2.75rem;
}

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

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-primary);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
  z-index: 2;
  transition: transform var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.3);
  background: var(--accent-secondary);
  border-color: #fff;
}

.timeline-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
  transition: all var(--transition-normal);
}

.timeline-card:hover {
  transform: translateX(6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.timeline-role {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-company {
  font-size: 0.95rem;
  color: var(--accent-secondary);
  font-weight: 600;
  display: block;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.3rem 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-full);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.timeline-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.timeline-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.timeline-skills span {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 0.2rem 0.6rem;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-primary);
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(99, 102, 241, 0.2);
}

/* --------------------------------------------------------------------------
   10. Testimonials Section
   -------------------------------------------------------------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.testimonial-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.quote-icon {
  font-size: 2rem;
  color: var(--accent-primary);
  opacity: 0.4;
  margin-bottom: 1rem;
}

.testimonial-text {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.65;
  font-style: italic;
  margin-bottom: 1.75rem;
  flex-grow: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-primary);
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.author-title {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   11. Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-normal);
}

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

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-sm);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.contact-card-content {
  display: flex;
  flex-direction: column;
}

.contact-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.contact-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-availability {
  padding: 1.5rem;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--border-radius-md);
}

.availability-indicator {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-primary);
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
}

.availability-note {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding-left: 1.25rem;
}

/* Contact Form */
.contact-form-wrapper {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 1.25rem;
}

.form-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.required {
  color: var(--error);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.85rem 1.1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group.error .form-input,
.form-group.error .form-textarea {
  border-color: var(--error);
}

.error-msg {
  display: none;
  font-size: 0.78rem;
  color: var(--error);
  margin-top: 0.35rem;
}

.form-group.error .error-msg {
  display: block;
}

.submit-btn {
  position: relative;
  height: 52px;
  cursor: pointer;
}

.btn-icon-send {
  transition: transform var(--transition-fast);
}

.submit-btn:hover .btn-icon-send {
  transform: translateX(4px);
}

.spinner {
  display: none;
  width: 22px;
  height: 22px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 0.8s linear infinite;
}

.submit-btn.loading .btn-text,
.submit-btn.loading .btn-icon-send {
  display: none;
}

.submit-btn.loading .spinner {
  display: block;
}

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

/* --------------------------------------------------------------------------
   12. Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2rem;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  width: 100%;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.heart-icon {
  color: #ef4444;
  margin: 0 3px;
}

/* --------------------------------------------------------------------------
   13. Floating Back-to-Top Button
   -------------------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
  cursor: pointer;
  z-index: 990;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.6);
}

/* --------------------------------------------------------------------------
   14. Project Details Modal
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  width: 100%;
  max-width: 780px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-lg);
  transform: scale(0.92) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-backdrop.active .modal-container {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  border: 1px solid var(--border-color);
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--error);
  color: #fff;
  border-color: var(--error);
}

.modal-body {
  padding: 2.2rem;
}

.modal-img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--border-radius-md);
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.modal-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-meta-item {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.modal-meta-item strong {
  color: var(--text-primary);
}

.modal-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.modal-features {
  margin-bottom: 1.5rem;
}

.modal-features h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.modal-features ul {
  padding-left: 1.25rem;
  list-style: disc;
  color: var(--text-secondary);
}

.modal-features li {
  margin-bottom: 0.4rem;
}

.modal-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

/* --------------------------------------------------------------------------
   15. Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 30px;
  left: 30px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.4rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  font-size: 0.92rem;
  font-weight: 500;
  min-width: 280px;
  transform: translateX(-100px);
  opacity: 0;
  animation: slideInToast 0.35s forwards;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--error);
}

.toast-icon {
  font-size: 1.2rem;
}

.toast.success .toast-icon {
  color: var(--success);
}

.toast.error .toast-icon {
  color: var(--error);
}

@keyframes slideInToast {
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* --------------------------------------------------------------------------
   16. Scroll Reveal Classes
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   17. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  
  .hero-container,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual {
    order: -1;
    margin-bottom: 1rem;
  }

  .avatar-wrapper {
    width: 280px;
    height: 280px;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 68px;
  }

  .section {
    padding: 4.5rem 0;
  }

  .section-title {
    font-size: 1.85rem;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-cta-desktop {
    display: none;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.5rem;
    transform: translateY(-150%);
    opacity: 0;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-list {
    flex-direction: column;
    gap: 1.25rem;
    width: 100%;
    text-align: center;
  }

  .nav-cta-mobile {
    display: block;
    width: 100%;
    margin-top: 0.5rem;
  }

  .nav-cta-mobile .btn {
    width: 100%;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .floating-badge.badge-1 {
    left: -10px;
  }

  .floating-badge.badge-2 {
    right: -10px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .stats-card {
    grid-template-columns: 1fr;
  }

  .toast-container {
    left: 1.5rem;
    right: 1.5rem;
    bottom: 20px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .avatar-wrapper {
    width: 220px;
    height: 220px;
  }

  .floating-badge {
    display: none;
  }

  .contact-form-wrapper {
    padding: 1.5rem;
  }
}