/* ========================================
   ITer Notes – Premium Dark Glassmorphism
   ======================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Core palette */
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.6);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-hover: rgba(255, 255, 255, 0.08);

  /* Accent gradients */
  --accent-1: #6366f1;
  /* Indigo */
  --accent-2: #8b5cf6;
  /* Violet */
  --accent-3: #a78bfa;
  /* Light violet */
  --accent-4: #06b6d4;
  /* Cyan */
  --accent-5: #14b8a6;
  /* Teal */
  --gradient-primary: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-4));
  --gradient-accent: linear-gradient(135deg, var(--accent-4), var(--accent-5));
  --gradient-text: linear-gradient(135deg, #c084fc, #818cf8, #22d3ee);
  --gradient-card-border: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(139, 92, 246, 0.1), rgba(6, 182, 212, 0.3));

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #a78bfa;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-glass: rgba(255, 255, 255, 0.1);
  --border-hover: rgba(139, 92, 246, 0.4);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
  --shadow-glow-accent: 0 0 60px rgba(139, 92, 246, 0.2);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Transition */
  --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-normal: 350ms;
  --duration-slow: 500ms;

  /* Typography */
  --font-sans: 'Inter', 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Layout */
  --max-width: 1140px;
  --nav-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -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: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* Animated mesh gradient background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 50% 50%, rgba(139, 92, 246, 0.06) 0%, transparent 60%);
  z-index: 0;
  pointer-events: none;
  animation: meshFloat 20s ease-in-out infinite alternate;
}

@keyframes meshFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(-20px, 15px) scale(1.02);
  }

  66% {
    transform: translate(15px, -10px) scale(0.98);
  }

  100% {
    transform: translate(-10px, 20px) scale(1.01);
  }
}

/* Grid dots overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: 0;
  pointer-events: none;
}

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

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

ul,
ol {
  list-style: none;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-1), var(--accent-2));
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-3);
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.35rem);
}

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

.mono {
  font-family: var(--font-mono);
}

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 80px 0;
}

.section-sm {
  padding: 48px 0;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(10, 14, 23, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  background: rgba(10, 14, 23, 0.9);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--text-primary);
  transition: transform var(--duration-fast) var(--ease-spring);
}

.nav-logo-link:hover {
  transform: scale(1.02);
}

.nav-logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 2px solid var(--accent-1);
  padding: 2px;
  background: var(--bg-secondary);
  object-fit: cover;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

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

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

.nav-link.active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.12);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 200;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 14, 23, 0.95);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  z-index: 150;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.nav-mobile.open {
  opacity: 1;
  pointer-events: auto;
}

.nav-mobile .nav-link {
  font-size: 1.25rem;
  padding: 12px 32px;
}

/* Search button */
.nav-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-search:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-glass-hover);
}

.nav-search svg {
  width: 18px;
  height: 18px;
}

/* ---------- Hero Section ---------- */
.hero {
  padding-top: calc(var(--nav-height) + 60px);
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

/* Floating orbs behind hero */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  pointer-events: none;
  animation: orbFloat 12s ease-in-out infinite alternate;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  background: var(--accent-1);
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 300px;
  height: 300px;
  background: var(--accent-4);
  bottom: -50px;
  right: -50px;
  animation-delay: -4s;
}

.hero-orb-3 {
  width: 200px;
  height: 200px;
  background: var(--accent-2);
  top: 50%;
  left: 50%;
  animation-delay: -8s;
}

@keyframes orbFloat {
  0% {
    transform: translate(0, 0) scale(1);
  }

  50% {
    transform: translate(30px, -20px) scale(1.1);
  }

  100% {
    transform: translate(-20px, 30px) scale(0.95);
  }
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
}

.hero-avatar-wrap {
  flex-shrink: 0;
  position: relative;
}

.hero-avatar {
  width: 300px;
  height: 300px;
  border-radius: var(--radius-xl);
  object-fit: cover;
  border: 3px solid transparent;
  background-clip: padding-box;
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  animation: avatarGlow 4s ease-in-out infinite alternate;
}

@keyframes avatarGlow {
  0% {
    box-shadow: var(--shadow-lg), 0 0 30px rgba(99, 102, 241, 0.2);
  }

  100% {
    box-shadow: var(--shadow-lg), 0 0 50px rgba(139, 92, 246, 0.3);
  }
}

.hero-avatar-ring {
  position: absolute;
  inset: -4px;
  border-radius: calc(var(--radius-xl) + 4px);
  background: var(--gradient-primary);
  z-index: 1;
  animation: ringRotate 6s linear infinite;
}

@keyframes ringRotate {
  0% {
    background: linear-gradient(0deg, var(--accent-1), var(--accent-2), var(--accent-4));
  }

  25% {
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2), var(--accent-4));
  }

  50% {
    background: linear-gradient(180deg, var(--accent-1), var(--accent-2), var(--accent-4));
  }

  75% {
    background: linear-gradient(270deg, var(--accent-1), var(--accent-2), var(--accent-4));
  }

  100% {
    background: linear-gradient(360deg, var(--accent-1), var(--accent-2), var(--accent-4));
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-3);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-full);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin-bottom: 20px;
  animation: fadeInUp 0.6s var(--ease-out) both;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #4ade80;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.5;
    transform: scale(0.8);
  }
}

.hero-title {
  margin-bottom: 20px;
  animation: fadeInUp 0.6s var(--ease-out) 0.1s both;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 32px;
  animation: fadeInUp 0.6s var(--ease-out) 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  animation: fadeInUp 0.6s var(--ease-out) 0.3s both;
}

.hero-socials {
  display: flex;
  gap: 12px;
  animation: fadeInUp 0.6s var(--ease-out) 0.4s both;
}

.hero-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.hero-social-link:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
}

.hero-social-link svg {
  width: 18px;
  height: 18px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15), transparent);
  opacity: 0;
  transition: opacity var(--duration-fast);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-ghost {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-ghost:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

/* ---------- Glass Cards ---------- */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

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

/* ---------- Section Headers ---------- */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.12);
  color: var(--accent-3);
}

.section-title-icon svg {
  width: 18px;
  height: 18px;
}

.section-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--duration-fast) var(--ease-out);
}

.section-link:hover {
  color: var(--accent-3);
}

.section-link svg {
  width: 16px;
  height: 16px;
}

/* ---------- Post Cards ---------- */
.post-card {
  padding: 0;
  display: flex;
  flex-direction: row;
  gap: 0;
}

.post-card-image {
  width: 280px;
  min-height: 200px;
  flex-shrink: 0;
  object-fit: cover;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.post-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}

.post-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  border-radius: var(--radius-full);
  width: fit-content;
  margin-bottom: 12px;
}

.post-badge-design {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-3);
}

.post-badge-devops {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-4);
}

.post-badge-frontend {
  background: rgba(236, 72, 153, 0.15);
  color: #f472b6;
}

.post-badge-ai {
  background: rgba(34, 211, 238, 0.15);
  color: #22d3ee;
}

.post-card-title {
  font-size: 1.2rem;
  margin-bottom: 8px;
  transition: color var(--duration-fast);
}

.post-card:hover .post-card-title {
  color: var(--accent-3);
}

.post-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.post-card-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.post-card-link {
  margin-left: auto;
  font-weight: 600;
  color: var(--accent-3);
  transition: all var(--duration-fast) var(--ease-out);
}

.post-card-link:hover {
  color: var(--accent-1);
}

/* Grid post card (no image) */
.post-card-grid {
  padding: 28px;
  display: flex;
  flex-direction: column;
}

/* ---------- Category Cards ---------- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.category-card {
  padding: 32px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.category-icon {
  font-size: 2.5rem;
  line-height: 1;
  filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.3));
}

.category-name {
  font-weight: 600;
  font-size: 0.95rem;
}

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

/* ---------- Page Header ---------- */
.page-header {
  padding-top: calc(var(--nav-height) + 50px);
  padding-bottom: 50px;
  position: relative;
  overflow: hidden;
}

.page-header-orb {
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
  pointer-events: none;
}

.page-header-orb-1 {
  background: var(--accent-1);
  top: -80px;
  right: -60px;
}

.page-header-orb-2 {
  background: var(--accent-4);
  bottom: -80px;
  left: -60px;
}

.page-header-inner {
  position: relative;
  z-index: 1;
}

.page-header .hero-badge {
  margin-bottom: 16px;
}

.page-header h1 {
  margin-bottom: 12px;
}

.page-header-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
}

/* ---------- About Page ---------- */
.about-hero {
  display: flex;
  align-items: center;
  gap: 48px;
}

.about-avatar {
  width: 220px;
  height: 220px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  flex-shrink: 0;
}

.about-content {
  flex: 1;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 6px 16px;
  font-size: 0.825rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.skill-tag:nth-child(odd) {
  border-color: rgba(99, 102, 241, 0.2);
  color: var(--accent-3);
}

.skill-tag:nth-child(even) {
  border-color: rgba(6, 182, 212, 0.2);
  color: var(--accent-4);
}

.skill-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* Timeline */
.timeline {
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 27px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-1), var(--accent-4), transparent);
}

.timeline-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  position: relative;
}

.timeline-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent-3);
  min-width: 56px;
  display: flex;
  align-items: flex-start;
  position: relative;
}

.timeline-year::after {
  content: '';
  position: absolute;
  right: -14px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.4);
}

.timeline-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding-top: 1px;
}

/* ---------- Contact Form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

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

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--duration-fast) var(--ease-out);
}

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

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
  background: rgba(255, 255, 255, 0.06);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.contact-info-card {
  padding: 32px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.contact-info-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.contact-info-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-3);
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 16px;
  height: 16px;
}

.contact-channels {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.contact-channels h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.contact-channel-links {
  display: flex;
  gap: 12px;
}

.contact-channel-link {
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.contact-channel-link:hover {
  color: var(--accent-3);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.footer {
  margin-top: 80px;
  padding: 60px 0 32px;
  background: rgba(17, 24, 39, 0.5);
  border-top: 1px solid var(--border-subtle);
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.3rem;
  margin-bottom: 12px;
  display: block;
}

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

.footer-ictu-logo {
  width: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 12px 0;
  opacity: 0.8;
  transition: opacity var(--duration-fast);
}

.footer-ictu-logo:hover {
  opacity: 1;
}

.footer-desc {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-socials {
  display: flex;
  gap: 8px;
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  transition: all var(--duration-fast) var(--ease-out);
}

.footer-social-link:hover {
  color: var(--accent-3);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.footer-social-link svg {
  width: 15px;
  height: 15px;
}

.footer-heading {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: all var(--duration-fast) var(--ease-out);
}

.footer-link:hover {
  color: var(--accent-3);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-contact-item svg {
  width: 14px;
  height: 14px;
  color: var(--accent-3);
  flex-shrink: 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom .heart {
  color: #ef4444;
  animation: heartbeat 1.5s ease-in-out infinite;
  display: inline-block;
}

@keyframes heartbeat {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.2);
  }
}

/* ---------- Stats row ---------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.stat-card {
  padding: 24px;
  text-align: center;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s var(--ease-out) both;
}

.delay-1 {
  animation-delay: 0.1s;
}

.delay-2 {
  animation-delay: 0.2s;
}

.delay-3 {
  animation-delay: 0.3s;
}

.delay-4 {
  animation-delay: 0.4s;
}

.delay-5 {
  animation-delay: 0.5s;
}

/* Intersection Observer animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
    transform var(--duration-slow) var(--ease-out);
}

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

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero-inner {
    flex-direction: column-reverse;
    text-align: center;
  }

  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-desc {
    text-align: center;
  }

  .hero-avatar {
    width: 240px;
    height: 240px;
  }

  .about-hero {
    flex-direction: column;
    text-align: center;
  }

  .about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .skills-grid {
    justify-content: center;
  }

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

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

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

  .nav-toggle {
    display: flex;
  }

  .nav-mobile {
    display: flex;
  }

  .hero {
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 60px;
  }

  .hero-avatar {
    width: 200px;
    height: 200px;
  }

  .hero-orb-1 {
    width: 250px;
    height: 250px;
  }

  .hero-orb-2 {
    width: 180px;
    height: 180px;
  }

  .post-card {
    flex-direction: column;
  }

  .post-card-image {
    width: 100%;
    min-height: 180px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }

  .categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .section {
    padding: 50px 0;
  }

  .page-header {
    padding-top: calc(var(--nav-height) + 30px);
    padding-bottom: 30px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .about-avatar {
    width: 180px;
    height: 180px;
  }
}

@media (max-width: 480px) {
  .hero-avatar {
    width: 160px;
    height: 160px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* ---------- Particle Canvas ---------- */
#particles-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ========================================
   Interactive Click Feedback System
   ======================================== */

/* --- Ripple Effect Container --- */
.ripple-container {
  position: relative;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.35) 0%, rgba(255, 255, 255, 0) 70%);
  transform: scale(0);
  animation: rippleExpand 0.6s ease-out forwards;
  pointer-events: none;
  z-index: 10;
}

@keyframes rippleExpand {
  0% {
    transform: scale(0);
    opacity: 0.6;
  }

  100% {
    transform: scale(4);
    opacity: 0;
  }
}

/* --- Button Press Effect --- */
.btn:active {
  transform: scale(0.95) !important;
  transition: transform 0.08s ease-out;
}

.btn-primary:active {
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.2) !important;
  filter: brightness(0.9);
}

.btn-ghost:active {
  background: rgba(255, 255, 255, 0.12) !important;
  filter: brightness(0.9);
}

/* --- Glass Card Click Feedback --- */
.glass-card:active {
  transform: scale(0.98) translateY(0) !important;
  transition: transform 0.1s ease-out;
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.15), inset 0 0 30px rgba(99, 102, 241, 0.04);
}

/* Post card specific click */
.post-card:active .post-card-title {
  color: var(--accent-1) !important;
}

.post-card.clicked {
  animation: cardFlash 0.3s ease-out;
}

@keyframes cardFlash {
  0% {
    border-color: var(--border-glass);
  }

  50% {
    border-color: var(--accent-1);
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.25);
  }

  100% {
    border-color: var(--border-glass);
  }
}

/* --- Category Card Click --- */
.category-card:active {
  transform: scale(0.93) translateY(0) !important;
  transition: transform 0.1s ease-out;
}

.category-card:active .category-icon {
  transform: scale(1.15);
  transition: transform 0.15s var(--ease-spring);
}

/* --- Nav Link Click --- */
.nav-link:active {
  transform: scale(0.92);
  background: rgba(99, 102, 241, 0.2) !important;
  transition: all 0.08s ease-out;
}

/* --- Social Link Click --- */
.hero-social-link:active,
.footer-social-link:active {
  transform: scale(0.85) !important;
  background: rgba(99, 102, 241, 0.2) !important;
  transition: transform 0.08s ease-out;
}

/* --- Contact Channel Link Click --- */
.contact-channel-link:active {
  transform: scale(0.92) !important;
  background: rgba(99, 102, 241, 0.15) !important;
  transition: transform 0.08s ease-out;
}

/* --- Footer Link Click --- */
.footer-link:active {
  color: var(--accent-1) !important;
  padding-left: 8px;
  transition: all 0.08s ease-out;
}

/* --- Post Card Read-More Link Click --- */
.post-card-link:active {
  color: var(--accent-1) !important;
  transform: translateX(3px);
  transition: all 0.08s ease-out;
}

/* --- Section Link Click --- */
.section-link:active {
  color: var(--accent-1) !important;
  transform: translateX(3px);
  transition: all 0.08s ease-out;
}

/* --- Skill Tag Click --- */
.skill-tag:active {
  transform: scale(0.9) !important;
  background: rgba(99, 102, 241, 0.15) !important;
  transition: transform 0.08s ease-out;
}

/* --- Form Submit Button --- */
.btn-submit:active {
  transform: scale(0.95) !important;
  filter: brightness(0.85);
  transition: all 0.08s ease-out;
}

/* --- Stat Card Hover/Click --- */
.stat-card:active {
  transform: scale(0.96) translateY(0) !important;
  transition: transform 0.08s ease-out;
}

/* --- Search Button Click --- */
.nav-search:active {
  transform: scale(0.88);
  background: rgba(99, 102, 241, 0.2) !important;
  transition: all 0.08s ease-out;
}

/* --- Generic Clickable Feedback --- */
.clickable {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.clickable:active {
  transform: scale(0.97);
  transition: transform 0.08s ease-out;
}

/* --- Touch Feedback (mobile) --- */
@media (hover: none) {

  .btn:active,
  .glass-card:active,
  .category-card:active {
    transition-duration: 0.05s;
  }
}

/* ========================================
   Article Modal / Popup
   ======================================== */
.article-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out);
}

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

.article-modal {
  width: 100%;
  max-width: 760px;
  max-height: 85vh;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg), var(--shadow-glow-accent);
  transform: translateY(40px) scale(0.95);
  transition: transform 0.4s var(--ease-spring);
}

.article-modal-overlay.open .article-modal {
  transform: translateY(0) scale(1);
}

/* Modal Header */
.article-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.article-modal-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--duration-fast) var(--ease-out);
}

.article-modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-glass-hover);
  border-color: var(--border-hover);
}

.article-modal-close:active {
  transform: scale(0.9);
}

/* Modal Body */
.article-modal-body {
  overflow-y: auto;
  padding: 32px 28px 40px;
  flex: 1;
}

.article-modal-body::-webkit-scrollbar { width: 4px; }
.article-modal-body::-webkit-scrollbar-thumb {
  background: rgba(99, 102, 241, 0.3);
  border-radius: 2px;
}

/* Article Content Styling */
.article-modal-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.article-modal-title {
  font-size: 1.6rem;
  line-height: 1.35;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.article-modal-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.article-modal-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Article prose */
.article-prose {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.85;
}

.article-prose h2 {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
}

.article-prose h3 {
  color: var(--text-primary);
  font-size: 1.05rem;
  margin: 24px 0 10px;
}

.article-prose p {
  margin-bottom: 16px;
}

.article-prose ul,
.article-prose ol {
  margin: 12px 0 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-prose ul { list-style: disc; }
.article-prose ol { list-style: decimal; }

.article-prose li {
  padding-left: 4px;
}

.article-prose code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-3);
  border: 1px solid rgba(99, 102, 241, 0.15);
}

.article-prose pre {
  margin: 16px 0;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-glass);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--accent-3);
}

.article-prose pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

.article-prose blockquote {
  margin: 16px 0;
  padding: 12px 20px;
  border-left: 3px solid var(--accent-1);
  background: rgba(99, 102, 241, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}

.article-prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Responsive modal */
@media (max-width: 768px) {
  .article-modal-overlay { padding: 12px; }
  .article-modal {
    max-height: 90vh;
    border-radius: var(--radius-lg);
  }
  .article-modal-body { padding: 24px 20px 32px; }
  .article-modal-header { padding: 16px 20px; }
  .article-modal-title { font-size: 1.3rem; }
}