/* ==========================================================================
   ZIHAN FAKIR - PROFESSIONAL PORTFOLIO
   Design System, Light & Dark Theme, Layout & Animations
   ========================================================================== */

@font-face {
  font-family: 'SincopaNina';
  src: url('../assets/fonts/SincopaNina.ttf') format('truetype'),
       url('../SincopaNina.ttf') format('truetype');
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Design Tokens (Dark Theme Default)
   -------------------------------------------------------------------------- */
:root {
  --font-brand: 'SincopaNina', var(--font-sans);
  /* Color Palette - Dark Theme (Default) */
  --bg-body: #0a0e1a;
  --bg-body-secondary: #0f172a;
  --bg-card: rgba(15, 23, 42, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --bg-card-solid: #131d35;
  --bg-header: rgba(10, 14, 26, 0.70);
  --bg-header-glass: linear-gradient(180deg, rgba(15, 23, 42, 0.78) 0%, rgba(10, 14, 26, 0.60) 100%);
  
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.4);
  
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.15);
  --secondary: #06b6d4;
  --accent-pink: #ec4899;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.15), transparent 70%);

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Transitions */
  --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);
  
  /* Spacing & Sizes */
  --container-max-w: 1200px;
  --header-height: 60px;
  --border-radius-sm: 8px;
  --border-radius-md: 14px;
  --border-radius-lg: 22px;
  --border-radius-full: 9999px;
}

/* --------------------------------------------------------------------------
   Light Theme Override (Applied when [data-theme="light"] or .light-theme is on body)
   -------------------------------------------------------------------------- */
[data-theme="light"],
body.light-theme {
  --bg-body: #f8fafc;
  --bg-body-secondary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: #ffffff;
  --bg-card-solid: #ffffff;
  --bg-header: rgba(255, 255, 255, 0.75);
  --bg-header-glass: linear-gradient(180deg, rgba(255, 255, 255, 0.85) 0%, rgba(248, 250, 252, 0.70) 100%);
  
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #f8fafc;
  
  --border-color: rgba(226, 232, 240, 0.9);
  --border-hover: rgba(79, 70, 229, 0.35);
  
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: rgba(79, 70, 229, 0.08);
  --secondary: #0284c7;
  
  --gradient-primary: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #0284c7 100%);
  --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(241, 245, 249, 0.6) 100%);
  --gradient-glow: radial-gradient(circle at 50% 50%, rgba(79, 70, 229, 0.08), transparent 70%);

  --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.08);
  --shadow-glow: 0 0 25px rgba(79, 70, 229, 0.15);
}

/* --------------------------------------------------------------------------
   2. Reset & Global Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Allow text selection and typing inside inputs and textareas */
input,
textarea {
  -webkit-user-select: text !important;
  -moz-user-select: text !important;
  -ms-user-select: text !important;
  user-select: text !important;
}

/* Hide all default browser/OS scrollbars across the entire UI while preserving scroll functionality */
html, body, div, section, main, textarea, .modal-window, .ai-chat-messages {
  scrollbar-width: none !important; /* Firefox */
  -ms-overflow-style: none !important; /* IE and Edge */
}

::-webkit-scrollbar {
  width: 0px !important;
  height: 0px !important;
  display: none !important;
  background: transparent !important;
}

::-webkit-scrollbar-thumb,
::-webkit-scrollbar-track,
::-webkit-scrollbar-button {
  display: none !important;
  background: transparent !important;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  font-size: 16px;
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: clip;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  position: relative;
  min-height: 100vh;
}

/* Background Ambient Glows */
.bg-ambient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.35;
  transition: opacity var(--transition-slow);
}

[data-theme="light"] .bg-ambient-orb,
body.light-theme .bg-ambient-orb {
  opacity: 0.10;
}

.orb-1 {
  top: -100px;
  left: -50px;
  width: 450px;
  height: 450px;
  background: var(--primary);
}

.orb-2 {
  bottom: 20%;
  right: -80px;
  width: 400px;
  height: 400px;
  background: var(--secondary);
}

.orb-3 {
  top: 45%;
  left: 20%;
  width: 350px;
  height: 350px;
  background: var(--accent-pink);
  opacity: 0.15;
}

/* Accessible Keyboard Focus Ring */
a:focus-visible,
button:focus-visible,
.btn:focus-visible,
.skill-card:focus-visible,
.filter-btn:focus-visible,
.nav-link:focus-visible,
.social-link:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary) !important;
  outline-offset: 3px !important;
}

/* Accessibility: Skip to Content Bypass Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 20px;
  background: var(--primary);
  color: #ffffff !important;
  padding: 10px 18px;
  border-radius: var(--border-radius-sm);
  font-weight: 700;
  z-index: 10001;
  transition: top var(--transition-fast);
  text-decoration: none;
}

.skip-link:focus {
  top: 20px;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
}

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

ul {
  list-style: none;
}

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

button, input, textarea {
  font-family: inherit;
}

.container {
  max-width: var(--container-max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 95px 0;
  position: relative;
}

/* Gradient Text */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 55px;
}

.section-tag {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid var(--border-hover);
  border-radius: var(--border-radius-full);
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.35rem;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* --------------------------------------------------------------------------
   3. Buttons & Interactive Controls
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--border-radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(99, 102, 241, 0.45);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  color: var(--primary);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
  border-radius: var(--border-radius-full);
}

/* --------------------------------------------------------------------------
   4. Header & Navigation Bar
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: var(--bg-header-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  z-index: 1000;
  transition: background var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

[data-theme="light"] .site-header,
body.light-theme .site-header {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04), inset 0 1px 0 rgba(255, 255, 255, 0.85);
}

[data-theme="light"] .site-header.scrolled,
body.light-theme .site-header.scrolled {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.95);
  border-bottom-color: rgba(226, 232, 240, 0.95);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
}

.logo-code-prefix {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
  line-height: 1;
}

.logo-brand-name {
  font-family: var(--font-brand);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-main);
  line-height: 1;
}

.logo-symbol {
  width: 34px;
  height: 34px;
  background: var(--gradient-primary);
  color: #ffffff;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.05rem;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  width: 36px;
  height: 36px;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: rotate(15deg) scale(1.05);
  color: var(--primary);
}

.theme-icon-sun {
  display: none;
  color: #f59e0b;
}

.theme-icon-moon {
  display: block;
  color: #6366f1;
}

/* Switch icon based on light theme */
[data-theme="light"] .theme-icon-sun,
body.light-theme .theme-icon-sun {
  display: block;
}

[data-theme="light"] .theme-icon-moon,
body.light-theme .theme-icon-moon {
  display: none;
}

/* Mobile Toggle Hamburger */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.35rem;
  cursor: pointer;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  transition: background var(--transition-fast);
}

.mobile-toggle:hover {
  background: var(--bg-card-hover);
}

/* --------------------------------------------------------------------------
   5. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 20px);
  padding-bottom: 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--primary-light);
  border: 1px solid var(--border-hover);
  border-radius: var(--border-radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 24px;
}

.badge-text-short,
.turnaround-text-short {
  display: none;
}

.hero-turnaround-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.35);
  padding: 7px 16px;
  border-radius: var(--border-radius-full);
  font-size: 0.86rem;
  font-weight: 600;
  color: #a855f7;
  margin-bottom: 24px;
}

.hero-turnaround-badge i {
  color: #f59e0b;
}

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

@keyframes pulse-ring {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-greeting {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 8px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -1.5px;
  margin-bottom: 16px;
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.65rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 2.4rem;
}

#typed-text {
  color: var(--primary);
  border-right: 2px solid var(--primary);
  padding-right: 4px;
  animation: blink-caret 0.75s step-end infinite;
}

@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: var(--primary) }
}

.hero-bio {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 34px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-socials {
  display: flex;
  align-items: center;
  gap: 14px;
}

.social-link {
  width: 42px;
  height: 42px;
  border-radius: var(--border-radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.15rem;
  transition: all var(--transition-fast);
}

.social-link:hover {
  color: #ffffff;
  background: var(--primary);
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* Hero Visual & Profile Frame */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.avatar-wrapper {
  position: relative;
  width: 350px;
  height: 350px;
}

.avatar-glow {
  position: absolute;
  inset: -15px;
  background: var(--gradient-primary);
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  filter: blur(24px);
  opacity: 0.45;
  animation: morph-glow 8s ease-in-out infinite alternate;
}

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

.avatar-container {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 32px;
  overflow: hidden;
  border: 2px solid var(--border-color);
  background: var(--bg-card-solid);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.avatar-svg,
.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
  transition: transform var(--transition-slow);
}

.avatar-wrapper:hover .avatar-img {
  transform: scale(1.06);
}

/* Floating Badges on Avatar */
.float-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-full);
  box-shadow: var(--shadow-md);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  animation: float 4s ease-in-out infinite alternate;
}

.float-badge-1 {
  top: 15px;
  left: -25px;
}

.float-badge-2 {
  bottom: 25px;
  right: -25px;
  animation-delay: -2s;
}

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

/* --------------------------------------------------------------------------
   6. Metrics / Stats Bar
   -------------------------------------------------------------------------- */
.stats-bar {
  padding: 40px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 20px 16px;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.stat-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 4px;
}

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

/* --------------------------------------------------------------------------
   7. About Section
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-text h3 {
  font-size: 1.8rem;
  margin-bottom: 18px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 1.05rem;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 24px;
}

.about-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  transition: var(--transition-fast);
  height: 100%;
}

.about-feature-item:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.25rem;
  color: var(--primary);
  margin-top: 2px;
}

.feature-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.feature-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.about-cards-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.glass-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card-title {
  font-size: 1.2rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title i {
  color: var(--primary);
}

/* --------------------------------------------------------------------------
   8. Skills Section
   -------------------------------------------------------------------------- */
.skills-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.skill-tab-btn {
  padding: 10px 22px;
  border-radius: var(--border-radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.skill-tab-btn:hover,
.skill-tab-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  position: relative;
  transition: all var(--transition-normal);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.skill-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.18);
}

.skill-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.skill-card-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.skill-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.55rem;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.skill-card:hover .skill-icon {
  transform: scale(1.08);
}

.skill-title-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.skill-title {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.25;
}

.skill-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.skill-percentage-badge {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 10px;
  border-radius: 14px;
  flex-shrink: 0;
}

.skill-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.skill-progress-track {
  width: 100%;
  height: 6px;
  background: var(--border-color);
  border-radius: 10px;
  overflow: hidden;
}

.skill-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
}

.skill-click-hint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--secondary);
  font-weight: 600;
  opacity: 0.85;
  transition: all var(--transition-fast);
}

.skill-card:hover .skill-click-hint {
  transform: translateX(3px);
  color: var(--primary);
}

.skill-progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 10px;
  transition: width 1s ease-in-out;
}

/* --------------------------------------------------------------------------
   9. Featured Projects Section
   -------------------------------------------------------------------------- */
.projects-filter {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 45px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 9px 20px;
  border-radius: var(--border-radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 30px;
}

.project-card {
  background: var(--bg-card);
  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-lg);
}

.project-thumbnail {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: var(--bg-card-solid);
}

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

.project-card:hover .project-img {
  transform: scale(1.06);
}

.project-badge-tag {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.project-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-title {
  font-size: 1.3rem;
  margin-bottom: 10px;
  transition: color var(--transition-fast);
}

.project-card:hover .project-title {
  color: var(--primary);
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 20px;
  flex-grow: 1;
}

.project-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tech-tag {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  padding: 4px 10px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--border-radius-sm);
  font-weight: 500;
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.project-links {
  display: flex;
  gap: 16px;
}

.project-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-main);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 6px 15px;
  border-radius: var(--border-radius-full);
  transition: all var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
}

.project-link-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   10. Experience & Education Timeline
   -------------------------------------------------------------------------- */
.timeline-container {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.timeline-container::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  left: 0;
  padding-right: 40px;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  padding-left: 40px;
  text-align: left;
}

.timeline-dot {
  position: absolute;
  top: 20px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  border: 4px solid var(--bg-body);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
  z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-dot {
  right: -9px;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: -9px;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 24px;
  backdrop-filter: blur(10px);
  transition: var(--transition-fast);
}

.timeline-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.timeline-date {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  margin-bottom: 10px;
}

.timeline-role {
  font-size: 1.2rem;
  margin-bottom: 6px;
}

.timeline-company {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 12px;
}

.timeline-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   11. Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 50px;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 22px;
  transition: all var(--transition-fast);
}

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

.contact-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.contact-card-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.contact-card-value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Contact Form */
.contact-form-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-body-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-main);
  font-size: 0.95rem;
  outline: none;
  transition: all var(--transition-fast);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

textarea.form-control {
  resize: vertical;
  min-height: 130px;
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* --------------------------------------------------------------------------
   12. Footer & Floating Back-To-Top
   -------------------------------------------------------------------------- */
.site-footer {
  padding: 50px 0 30px;
  background: var(--bg-body-secondary);
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border-color);
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 6px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 12px;
}

.back-to-top {
  position: fixed;
  bottom: 80px;
  right: 25px;
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-full);
  background: var(--gradient-primary);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(99, 102, 241, 0.5);
}

/* --------------------------------------------------------------------------
   13. Toast Notification Component
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 30px;
  left: 30px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  color: var(--text-main);
  box-shadow: var(--shadow-lg);
  font-size: 0.92rem;
  transform: translateX(-120%);
  transition: transform var(--transition-normal);
  backdrop-filter: blur(12px);
}

.toast.show {
  transform: translateX(0);
}

.toast.success i {
  color: var(--accent-emerald);
}

.toast.error i {
  color: #ef4444;
}

/* --------------------------------------------------------------------------
   14. Project Details Modal
   -------------------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1200;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-fast);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.modal-window {
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  max-width: 720px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: transform var(--transition-fast);
  position: relative;
  padding: 32px;
}

.modal-window::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

.modal-overlay.open .modal-window {
  transform: scale(1);
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 1.15rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  z-index: 10;
}

.modal-close-btn:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #ef4444;
}

/* --------------------------------------------------------------------------
   14. AI Assistant Floating Widget
   -------------------------------------------------------------------------- */
.ai-assistant-btn {
  position: fixed;
  bottom: 25px;
  right: 25px;
  height: 44px;
  padding: 0 18px;
  border-radius: var(--border-radius-full);
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: #ffffff;
  border: 1px solid rgba(165, 180, 252, 0.28);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 18px rgba(79, 70, 229, 0.32), 0 2px 6px rgba(0, 0, 0, 0.15);
  transition: all var(--transition-normal);
  z-index: 1050;
  pointer-events: auto;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.ai-assistant-btn:hover {
  transform: translateY(-2px) scale(1.02);
  background: linear-gradient(135deg, #4338ca, #4f46e5);
  border-color: rgba(165, 180, 252, 0.45);
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.42), 0 2px 6px rgba(0, 0, 0, 0.2);
}

.ai-assistant-btn i {
  font-size: 1.15rem;
  color: #ffffff;
}

.ai-badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.ai-chat-window {
  position: fixed;
  bottom: 25px;
  right: 25px;
  width: 380px;
  max-width: calc(100vw - 40px);
  height: 520px;
  max-height: calc(100vh - 50px);
  background: var(--bg-card-solid);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg), 0 10px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(99, 102, 241, 0.15);
  display: flex;
  flex-direction: column;
  z-index: 1100;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(20px) scale(0.95);
  transition: all var(--transition-normal);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
}

.ai-chat-window.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.ai-chat-header {
  padding: 14px 18px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.08));
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ai-header-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.95rem;
}

.ai-header-close {
  background: var(--bg-body-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 1rem;
  width: 32px;
  height: 32px;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ai-header-close:hover {
  background: #ef4444;
  border-color: #ef4444;
  color: #ffffff;
}

.ai-chat-messages {
  flex: 1;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ai-chat-messages::-webkit-scrollbar {
  display: none !important;
  width: 0 !important;
  height: 0 !important;
}

.ai-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.88rem;
  line-height: 1.45;
  word-break: break-word;
}

.ai-msg-bot {
  align-self: flex-start;
  background: var(--bg-body-secondary);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 4px;
}

.ai-msg-user {
  align-self: flex-end;
  background: var(--gradient-primary);
  color: #ffffff;
  border-bottom-right-radius: 4px;
}

.typing-indicator {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 10px 14px;
}

.typing-indicator span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
  display: inline-block;
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.3); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.ai-quick-prompts {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 8px 16px 10px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-card);
}

.ai-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.78rem;
  background: var(--bg-body-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-full);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ai-chip:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.ai-chat-input-area {
  padding: 10px 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 8px;
  background: var(--bg-card-solid);
}

.ai-chat-input {
  flex: 1;
  background: var(--bg-body-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 8px 14px;
  font-size: 0.88rem;
  color: var(--text-main);
  outline: none;
  font-family: var(--font-sans);
}

.ai-chat-input:focus {
  border-color: var(--primary);
}

.ai-chat-send {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.ai-chat-send:hover {
  background: var(--primary-hover);
  transform: scale(1.06);
}

/* ==========================================================================
   15. Comprehensive Responsive Breakpoints (Optimized for ALL Devices)
   ========================================================================== */

/* --- Standard Laptops & Desktops (<= 1200px) --- */
@media (max-width: 1200px) {
  .container {
    max-width: 100%;
    padding: 0 28px;
  }
}

/* --- Tablets & Small Laptops (<= 992px) --- */
@media (max-width: 992px) {
  .nav-menu {
    gap: 18px;
  }

  .nav-actions .btn-primary {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  
  .hero-bio {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-socials {
    justify-content: center;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  
  .timeline-container::before {
    left: 20px;
  }
  
  .timeline-item {
    width: 100%;
    left: 0 !important;
    padding-left: 55px !important;
    padding-right: 0 !important;
    text-align: left !important;
  }
  
  .timeline-item .timeline-dot {
    left: 11px !important;
    right: auto !important;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-item:last-child {
    grid-column: 1 / -1;
  }
}

/* --- Tablets Portrait & Large Mobile (<= 768px) --- */
@media (max-width: 768px) {
  /* Complete Zero-Lag Mobile Performance: Strip all blurs & ambient orbs on mobile */
  *,
  *::before,
  *::after {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }

  .bg-ambient-orb {
    display: none !important;
  }

  body {
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
  }

  .section {
    padding: 60px 0;
  }

  /* Header: Clean Solid Background (Zero Scroll Lag, Zero Blur) */
  .site-header {
    background: var(--bg-card-solid) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15) !important;
    border-bottom: 1px solid var(--border-color) !important;
  }

  .mobile-toggle {
    display: flex;
  }

  .nav-actions .btn-primary {
    display: none;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    background: var(--bg-card-solid);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px;
    gap: 18px;
    transform: translateY(-150%);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
  }
  
  .nav-menu.open {
    transform: translateY(0);
  }

  /* Cards on Mobile: Clean solid cards with zero blur */
  .glass-card,
  .stat-item,
  .contact-form-box,
  .contact-info-card,
  .stats-bar,
  .timeline-card,
  .skill-card,
  .project-card,
  .theme-toggle-btn {
    background: var(--bg-card-solid) !important;
    box-shadow: var(--shadow-sm) !important;
    border: 1px solid var(--border-color) !important;
  }

  .stat-item {
    border-radius: 14px !important;
    padding: 16px 14px !important;
  }

  /* Disable heavy GPU-draining blurs and repaints on mobile */
  .avatar-glow {
    display: none !important;
  }

  .float-badge {
    animation: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: var(--bg-card-solid) !important;
    padding: 6px 12px !important;
    font-size: 0.78rem !important;
  }

  .float-badge-1 {
    top: -6px !important;
    left: 0 !important;
    right: auto !important;
  }

  .float-badge-2 {
    bottom: -6px !important;
    right: 0 !important;
    left: auto !important;
  }

  .ai-assistant-btn {
    animation: none !important;
    background: linear-gradient(135deg, #4f46e5, #6366f1) !important;
  }

  /* Mobile Inputs: Ensure 16px to prevent iOS viewport auto-zoom */
  .form-control,
  .ai-chat-input {
    font-size: 16px !important;
  }

  /* Compact Hero Badges on Mobile (Requested by User) */
  .badge-text-full {
    display: none !important;
  }
  .badge-text-short {
    display: inline !important;
  }
  .turnaround-text-full {
    display: none !important;
  }
  .turnaround-text-short {
    display: inline !important;
  }

  .hero-badge {
    padding: 4px 12px !important;
    font-size: 0.72rem !important;
    gap: 6px !important;
    margin-bottom: 12px !important;
    line-height: 1.25 !important;
    max-width: 100% !important;
    border-radius: 20px !important;
  }

  .hero-badge .pulse-dot {
    width: 6px !important;
    height: 6px !important;
  }

  .hero-turnaround-badge {
    padding: 4px 12px !important;
    font-size: 0.72rem !important;
    gap: 6px !important;
    margin-bottom: 16px !important;
    line-height: 1.25 !important;
    max-width: 100% !important;
    border-radius: 20px !important;
  }

  .hero-turnaround-badge i {
    font-size: 0.75rem !important;
  }

  /* Hero Section */
  .hero-section {
    padding-top: calc(var(--header-height) + 15px);
    padding-bottom: 35px;
  }
  
  .hero-title {
    font-size: clamp(2rem, 7.5vw, 2.5rem);
    line-height: 1.18;
    word-break: break-word;
  }
  
  .hero-subtitle {
    font-size: 1.15rem;
    min-height: 2.8rem;
  }

  .avatar-wrapper {
    width: min(240px, 70vw);
    height: min(240px, 70vw);
    margin: 15px auto;
  }
  
  .form-grid-2 {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
  }

  .modal-window {
    max-width: 92%;
    padding: 24px 18px;
    background: var(--bg-card-solid);
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 24px;
  }

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: 18px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
}

/* --- Standard Mobile Phones (<= 576px) --- */
@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .hero-title {
    font-size: 2.05rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
    min-height: 3rem;
  }
  
  .avatar-wrapper {
    width: min(230px, 70vw);
    height: min(230px, 70vw);
  }

  .timeline-card {
    padding: 16px 14px;
  }

  .hero-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 320px;
    margin: 0 auto 24px auto;
    gap: 12px;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .skills-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .modal-window {
    width: 95%;
    max-width: 95%;
    padding: 20px 15px;
    border-radius: var(--border-radius-md);
  }

  .contact-form-box {
    padding: 20px 15px;
  }

  .glass-card {
    padding: 20px 15px;
  }

  .site-footer .hero-socials a {
    width: 44px !important;
    height: 44px !important;
    font-size: 1.1rem !important;
  }

  .ai-assistant-btn .ai-btn-label {
    display: none;
  }

  .ai-assistant-btn {
    right: 18px;
    bottom: 20px;
    width: 48px;
    height: 48px;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
    position: fixed;
    z-index: 1050;
    cursor: pointer;
    pointer-events: auto;
    background: linear-gradient(135deg, #4f46e5, #6366f1) !important;
    border: 1px solid rgba(165, 180, 252, 0.28) !important;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.32), 0 2px 6px rgba(0, 0, 0, 0.2) !important;
  }

  .ai-assistant-btn i {
    font-size: 1.35rem;
    color: #ffffff;
    margin: 0;
  }

  .ai-assistant-btn .ai-badge-pulse {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 10px;
    height: 10px;
    border: 2px solid #ffffff;
  }

  .back-to-top {
    right: 18px;
    bottom: 76px;
    width: 44px;
    height: 44px;
    z-index: 999;
  }

  .ai-chat-window {
    right: 12px;
    left: 12px;
    width: auto;
    bottom: 15px;
    max-height: calc(100vh - 80px);
    height: 500px;
    background: var(--bg-card-solid);
    z-index: 1100;
  }

  .ai-chat-window.open {
    display: flex !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    transform: translateY(0) scale(1) !important;
  }

  .toast-container {
    top: 20px;
    bottom: auto;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 380px;
    z-index: 10000;
    pointer-events: none;
  }

  .toast {
    pointer-events: auto;
  }
}

/* --- Ultra-Compact Devices (<= 380px, down to 320px) --- */
@media (max-width: 380px) {
  .container {
    padding: 0 12px;
  }

  .hero-title {
    font-size: 1.85rem;
    line-height: 1.2;
  }

  .hero-greeting {
    font-size: 0.85rem;
  }

  .hero-badge {
    font-size: 0.72rem;
    padding: 4px 10px;
  }

  .logo-brand-name {
    font-size: 1.35rem;
  }

  .logo-code-prefix {
    font-size: 1.15rem;
  }

  .nav-container {
    padding: 0 12px;
  }

  .skill-card {
    padding: 14px 12px;
  }

  .modal-window {
    width: 98%;
    max-width: 98%;
    padding: 18px 12px;
  }

  .timeline-item {
    padding-left: 45px !important;
  }

  .timeline-item .timeline-dot {
    left: 6px !important;
  }

  .timeline-container::before {
    left: 15px;
  }

  .contact-form-box {
    padding: 18px 12px;
  }

  .glass-card {
    padding: 18px 12px;
  }
}

/* --- Light Theme Contrast Fixes --- */
[data-theme="light"] .hero-turnaround-badge {
  color: #7e22ce !important;
  border-color: rgba(126, 34, 206, 0.35) !important;
  background: rgba(126, 34, 206, 0.08) !important;
}

[data-theme="light"] #contact-whatsapp-btn {
  color: #059669 !important;
  border-color: #059669 !important;
}