/* ==========================================================================
   Tasfiqur Rahman (Tasfi / Echo) - Modern & Minimal Portfolio Design System
   ========================================================================== */

/* --------------------------------------------------------------------------
   Google Fonts Import
   -------------------------------------------------------------------------- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;500;600&family=Outfit:wght@500;600;700;800&display=swap');

/* --------------------------------------------------------------------------
   Design Tokens & CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette - Dark (Default) */
  --bg-primary: #090a0f;
  --bg-secondary: #0f111a;
  --bg-tertiary: #161926;
  --bg-card: rgba(18, 21, 33, 0.7);
  --bg-card-hover: rgba(26, 31, 48, 0.85);
  --bg-glass: rgba(15, 17, 26, 0.75);
  --bg-input: rgba(12, 14, 22, 0.8);
  
  /* Text Colors */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #090a0f;
  
  /* Accents & Gradients */
  --accent-primary: #6366f1;       /* Indigo */
  --accent-secondary: #8b5cf6;     /* Purple */
  --accent-cyan: #06b6d4;          /* Cyan */
  --accent-emerald: #10b981;       /* Active Green */
  --accent-amber: #f59e0b;         /* Learning Amber */
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #38bdf8 100%);
  --accent-subtle: rgba(99, 102, 241, 0.12);
  --accent-subtle-hover: rgba(99, 102, 241, 0.2);
  --accent-glow: 0 0 25px rgba(99, 102, 241, 0.35);

  /* Borders & Dividers */
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(99, 102, 241, 0.4);
  --border-card: rgba(255, 255, 255, 0.06);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Outfit', 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 10px 30px -10px rgba(99, 102, 241, 0.3);

  /* Dimensions & Spacing */
  --header-height: 72px;
  --container-max-width: 1140px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Overrides */
[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, 0.85);
  --bg-input: #ffffff;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-cyan: #0284c7;
  --accent-subtle: rgba(79, 70, 229, 0.08);
  --accent-subtle-hover: rgba(79, 70, 229, 0.15);
  --accent-glow: 0 0 25px rgba(79, 70, 229, 0.2);

  --border-subtle: rgba(0, 0, 0, 0.07);
  --border-focus: rgba(79, 70, 229, 0.4);
  --border-card: rgba(0, 0, 0, 0.06);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.09);
  --shadow-glow: 0 10px 30px -10px rgba(79, 70, 229, 0.2);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 1rem;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  position: relative;
}

/* Subtle Ambient Background */
.bg-ambient-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-glow-top {
  position: absolute;
  top: -15%;
  left: 20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, rgba(139, 92, 246, 0.05) 50%, transparent 70%);
  filter: blur(80px);
  animation: floatAmbient 18s ease-in-out infinite alternate;
}

.ambient-glow-bottom {
  position: absolute;
  bottom: 10%;
  right: 15%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.08) 0%, rgba(99, 102, 241, 0.04) 50%, transparent 70%);
  filter: blur(90px);
  animation: floatAmbient 22s ease-in-out infinite alternate-reverse;
}

.bg-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, var(--border-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-subtle) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 80%);
  opacity: 0.6;
}

@keyframes floatAmbient {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -25px) scale(1.08); }
  100% { transform: translate(-20px, 20px) scale(0.95); }
}

/* --------------------------------------------------------------------------
   Layout & Container
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

section {
  padding: 100px 0;
  position: relative;
}

@media (max-width: 768px) {
  section {
    padding: 70px 0;
  }
}

/* --------------------------------------------------------------------------
   Typography & Headers
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

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

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

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-primary);
  background: var(--accent-subtle);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  border: 1px solid var(--border-focus);
}

.section-title {
  font-size: 2.25rem;
  margin-bottom: 14px;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.75rem;
  }
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Components: Buttons & Badges
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 1px solid transparent;
  user-select: none;
  text-decoration: none;
  line-height: 1;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn-primary {
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background: #5558e6;
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -6px rgba(99, 102, 241, 0.45);
}

.btn-primary:hover svg {
  transform: translateX(3px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-subtle);
  backdrop-filter: blur(12px);
}

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

.btn-sm {
  padding: 8px 16px;
  font-size: 0.84rem;
  border-radius: var(--radius-sm);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* Status Indicator Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  position: relative;
}

.status-dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  opacity: 0.4;
  animation: pulseDot 2s infinite ease-out;
}

@keyframes pulseDot {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(2.2); opacity: 0; }
}

/* --------------------------------------------------------------------------
   Sticky Navigation Bar
   -------------------------------------------------------------------------- */
.navbar-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all var(--transition-normal);
  padding: 16px 0;
}

.navbar-wrapper.scrolled {
  padding: 10px 0;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.brand-symbol {
  width: 36px;
  height: 36px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.brand-symbol img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.nav-avatar-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  background: var(--bg-card);
  flex-shrink: 0;
}

.nav-avatar-btn:hover {
  border-color: var(--border-focus);
  box-shadow: 0 0 14px rgba(99, 102, 241, 0.35);
  transform: translateY(-2px);
}

.nav-avatar-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand-meta {
  display: flex;
  flex-direction: column;
}

.brand-meta .brand-sub {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  background: var(--bg-card);
  padding: 4px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--accent-subtle);
}

.nav-link.active {
  color: #ffffff;
  background: var(--accent-primary);
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.35);
}

[data-theme="light"] .nav-link.active {
  color: #ffffff;
}

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

.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.theme-toggle-btn svg {
  width: 19px;
  height: 19px;
}

.theme-toggle-btn .sun-icon {
  display: none;
}

[data-theme="light"] .theme-toggle-btn .sun-icon {
  display: block;
}

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

.hamburger-btn {
  display: none;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* Mobile Nav Drawer */
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  z-index: 1050;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -300px;
  width: 280px;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  z-index: 1100;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: right var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.mobile-nav-drawer.open {
  right: 0;
}

.mobile-nav-overlay.open {
  display: block;
  opacity: 1;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-nav-links a {
  display: block;
  padding: 10px 14px;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
  background: var(--accent-subtle);
  color: var(--accent-primary);
  padding-left: 18px;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 50px;
}

.hero-meta-top {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.location-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.hero-name-block {
  margin-bottom: 12px;
}

.hero-sub-tag {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--accent-cyan);
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  display: block;
}

.hero-name {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 10px;
}

.hero-headline {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  line-height: 1.25;
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 32px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.hero-stats-row {
  display: flex;
  align-items: center;
  gap: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-value {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 2px;
}

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

.hero-image-card {
  position: relative;
  width: 100%;
  max-width: 380px;
  aspect-ratio: 1 / 1.08;
  border-radius: var(--radius-xl);
  padding: 10px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.08) 0%, rgba(99, 102, 241, 0.15) 100%);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
  transition: transform var(--transition-normal);
}

.hero-image-card:hover {
  transform: translateY(-4px);
}

.hero-image-inner {
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius-xl) - 6px);
  overflow: hidden;
  position: relative;
  background-color: var(--bg-tertiary);
}

.hero-image-inner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform var(--transition-slow) ease;
}

.hero-image-card:hover .hero-image-inner img {
  transform: scale(1.03);
}

.hero-image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(9, 10, 15, 0.75) 0%, transparent 45%);
  pointer-events: none;
}

/* Floating Badges around hero image */
.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  z-index: 2;
  animation: floatCard 6s ease-in-out infinite alternate;
}

.floating-badge-1 {
  bottom: 20px;
  left: -20px;
  animation-delay: 0s;
}

.floating-badge-2 {
  top: 25px;
  right: -20px;
  animation-delay: 3s;
}

@keyframes floatCard {
  0% { transform: translateY(0); }
  100% { transform: translateY(-8px); }
}

.floating-badge-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--border-subtle);
}

.floating-badge-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

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

.floating-badge-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.floating-badge-sub {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: stretch;
}

.about-narrative-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 36px;
  backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.about-intro-text {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.about-quote-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: var(--accent-subtle);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-md);
  margin-top: auto;
}

.about-quote-icon {
  color: var(--accent-primary);
  font-size: 1.5rem;
}

.about-quote-text {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.about-pillars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.pillar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 22px;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.pillar-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.pillar-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.pillar-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.pillar-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   Skills Section
   -------------------------------------------------------------------------- */
.skills-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.skill-tab-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.skill-tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.skill-tab-btn.active {
  background: var(--accent-primary);
  border-color: var(--accent-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(240px, 1fr));
  gap: 16px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.skill-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.skill-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.skill-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  font-size: 1.1rem;
}

.skill-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.skill-badge {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.skill-badge.badge-learning {
  background: rgba(245, 158, 11, 0.12);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.skill-badge.badge-proficient {
  background: var(--accent-subtle);
  color: var(--accent-primary);
  border: 1px solid var(--border-focus);
}

/* --------------------------------------------------------------------------
   Projects Section
   -------------------------------------------------------------------------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(460px, 1fr));
  gap: 32px;
}

@media (max-width: 600px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

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

.project-card:hover {
  border-color: var(--border-focus);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.project-media-wrapper {
  width: 100%;
  height: 230px;
  position: relative;
  background-color: var(--bg-tertiary);
  overflow: hidden;
}

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

.project-media-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(9, 10, 15, 0.4) 0%, transparent 60%);
  pointer-events: none;
}

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

.project-category-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(9, 10, 15, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.project-content {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.project-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.project-role-tag {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(6, 182, 212, 0.2);
  white-space: nowrap;
}

.project-description {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.project-responsibilities-box {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 20px;
  border: 1px solid var(--border-subtle);
}

.responsibilities-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.responsibilities-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
}

.responsibilities-list li {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.responsibilities-list li::before {
  content: '▹';
  color: var(--accent-primary);
  font-size: 0.9rem;
}

.project-footer {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  flex: 1;
}

.project-tag {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: var(--bg-tertiary);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.project-cta-btn {
  white-space: nowrap;
  gap: 6px;
  padding: 9px 18px;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.project-cta-btn svg {
  transition: transform var(--transition-fast);
}

.project-cta-btn:hover svg {
  transform: translate(2px, -2px);
}

/* --------------------------------------------------------------------------
   Experience Section
   -------------------------------------------------------------------------- */
.experience-timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 36px;
}

.experience-timeline::before {
  content: '';
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 11px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-primary) 0%, var(--accent-cyan) 60%, var(--border-subtle) 100%);
}

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

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

.timeline-marker {
  position: absolute;
  left: -36px;
  top: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 2px solid var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}

.timeline-marker-inner {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 26px;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.timeline-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateX(4px);
}

.timeline-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 6px;
}

.timeline-brand-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.timeline-brand-img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--border-subtle);
  background: var(--bg-tertiary);
  flex-shrink: 0;
}

.timeline-company {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-primary);
  background: var(--accent-subtle);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-focus);
}

.timeline-role {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.timeline-description {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Services Section ("What I Do")
   -------------------------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 26px;
  backdrop-filter: blur(10px);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

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

.service-icon-box {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 18px;
  transition: transform var(--transition-fast);
}

.service-card:hover .service-icon-box {
  transform: scale(1.1);
  background: var(--accent-primary);
  color: #ffffff;
}

.service-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.service-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Contact Section ("Let's Work Together")
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
}

.contact-info-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-channel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(10px);
  transition: all var(--transition-fast);
}

.contact-channel-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.contact-channel-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.contact-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
}

.contact-val {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
}

.copy-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
}

/* Contact Interactive Form */
.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(12px);
}

.contact-form-header {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
  outline: none;
}

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

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

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  padding: 60px 0 36px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 1;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.footer-brand h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-social-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.social-link-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.84rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-focus);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  transition: all var(--transition-normal);
}

.toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

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

/* --------------------------------------------------------------------------
   Scroll Animations
   -------------------------------------------------------------------------- */
.reveal-init {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* --------------------------------------------------------------------------
   Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-meta-top {
    justify-content: center;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-ctas {
    justify-content: center;
  }

  .hero-stats-row {
    justify-content: center;
  }

  .hero-visual-wrapper {
    order: -1;
  }

  .hero-image-card {
    max-width: 320px;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }
}

@media (max-width: 576px) {
  .hero-name {
    font-size: 2.25rem;
  }

  .hero-headline {
    font-size: 1.35rem;
  }

  .about-pillars-grid {
    grid-template-columns: 1fr;
  }

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

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

  .responsibilities-list {
    grid-template-columns: 1fr;
  }
}