/* =============================================
   CSS CUSTOM PROPERTIES
   ============================================= */
:root {
  /* Background layers */
  --bg:        #0a0a0a;
  --surface:   #111111;
  --surface2:  #181818;
  --surface3:  #222222;

  /* Borders */
  --border:    #1e1e1e;
  --border-h:  #383838;

  /* Text */
  --text:      #ededed;
  --text-2:    #888888;
  --text-3:    #444444;

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

  /* Shape */
  --radius:    4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Elevation */
  --shadow:    0 1px 4px rgba(0,0,0,0.6);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.8);

  /* Motion */
  --nav-h:    64px;
  --dur-fast: 150ms;
  --dur-base: 220ms;
  --dur-slow: 350ms;
  --ease:     cubic-bezier(0.4, 0, 0.2, 1);
  --transition: var(--dur-base) var(--ease);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--surface3) var(--surface);
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--surface3); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-h); }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 1rem;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

::selection { background: rgba(237,237,237,0.15); color: var(--text); }

/* Keyboard focus ring — a11y */
:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
  border-radius: var(--radius);
}

/* Form fields already show a visible ring via border-color on focus */
.form-input:focus-visible,
.form-textarea:focus-visible { outline: none; }

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.025em;
}

/* =============================================
   LAYOUT
   ============================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section { padding: 7rem 0; }

.section-alt { background: var(--surface); }

.section-header { margin-bottom: 4rem; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.85rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text-3);
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1rem;
}

.section-sub {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 480px;
  line-height: 1.75;
}

.section-footer { text-align: center; margin-top: 3rem; }

/* =============================================
   NAVBAR
   ============================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.navbar.scrolled { border-bottom-color: var(--border); }

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.06em;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.nav-logo:hover { border-color: var(--border-h); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0;
  list-style: none;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius);
  transition: color var(--transition);
  position: relative;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 1px;
  left: 0.9rem;
  right: 0.9rem;
  height: 1px;
  background: var(--text);
}

.nav-resume {
  margin-left: 0.75rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--border-h);
  border-radius: var(--radius);
  color: var(--text) !important;
  font-size: 0.8rem;
  transition: all var(--transition) !important;
}

.nav-resume:hover {
  background: var(--text) !important;
  color: var(--bg) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 11px;
  min-width: 44px;
  min-height: 44px;
  z-index: 1001;
  position: relative;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
  border-radius: 1px;
  transition: all var(--transition);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn svg { width: 14px; height: 14px; flex-shrink: 0; }

.btn-primary {
  background: var(--text);
  color: var(--bg);
}

.btn-primary:hover {
  background: #d0d0d0;
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  border-color: var(--text);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--border-h);
  transform: translateY(-1px);
}

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

/* =============================================
   HERO
   ============================================= */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 5rem) 2rem 5rem;
  position: relative;
  overflow: hidden;
}

/* Dot grid texture */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.065) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 80% 70% at 40% 30%, black 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 40% 30%, black 20%, transparent 100%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero-eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--text-3);
  flex-shrink: 0;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: clamp(4rem, 10vw, 9rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 0.92;
  color: var(--text);
  margin-bottom: 2.25rem;
}

.hero-typing-wrapper {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  color: var(--text-3);
  margin-bottom: 2rem;
  min-height: 1.6rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.typing-prefix { color: var(--text-3); }
.typing-text { color: var(--text-2); }

.typing-cursor {
  color: var(--text-2);
  animation: blink 1s step-end infinite;
}

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

.hero-summary {
  font-size: 1.025rem;
  color: var(--text-2);
  max-width: 520px;
  line-height: 1.8;
  margin-bottom: 2.75rem;
}

.hero-cta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* =============================================
   MARQUEE
   ============================================= */
.marquee-section {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  overflow: hidden;
  user-select: none;
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: max-content;
  animation: marquee 35s linear infinite;
}

.marquee-item {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  white-space: nowrap;
}

.marquee-dot {
  width: 3px;
  height: 3px;
  background: var(--surface3);
  border-radius: 50%;
  flex-shrink: 0;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* =============================================
   PROJECT CARDS
   ============================================= */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.projects-grid-full {
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.project-card {
  background: var(--bg);
  padding: 1.75rem;
  transition: background var(--dur-base) var(--ease);
}

.project-card:hover { background: var(--surface); }

/* Featured card — spans full width */
.project-card--featured {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  padding: 2.5rem;
  background: var(--surface);
}

.project-card--featured:hover { background: var(--surface2); }

.card-body { flex: 1; min-width: 0; }

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

.card-category {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.card-num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.project-card--featured .card-title {
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  letter-spacing: -0.025em;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.card-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }

/* Clickable project cards (linked to a repo) */
.project-card--link { cursor: pointer; }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-2);
  text-decoration: none;
  transition: color var(--dur-base) var(--ease);
}

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

.card-featured-badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  border: 1px solid var(--border);
  padding: 0.3rem 0.7rem;
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
  align-self: flex-start;
}

/* =============================================
   TAGS
   ============================================= */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-3);
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
  transition: all var(--transition);
  letter-spacing: 0.03em;
}

.tag:hover {
  color: var(--text-2);
  border-color: var(--border-h);
}

/* =============================================
   FILTER BAR
   ============================================= */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  background: transparent;
  border: 1px solid var(--border);
  padding: 0.4rem 1rem;
  border-radius: var(--radius);
  transition: all var(--transition);
  min-height: 36px;
}

.filter-btn:hover {
  color: var(--text-2);
  border-color: var(--border-h);
}

.filter-btn.active {
  color: var(--bg);
  background: var(--text);
  border-color: var(--text);
}

/* =============================================
   PAGE HERO
   ============================================= */
.page-hero {
  padding: calc(var(--nav-h) + 5rem) 0 4rem;
  border-bottom: 1px solid var(--border);
}

.page-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.page-title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  color: var(--text);
  line-height: 0.92;
  margin-bottom: 1.25rem;
}

.page-sub {
  font-size: 1rem;
  color: var(--text-2);
  max-width: 480px;
  line-height: 1.7;
}

/* =============================================
   ABOUT
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-bio {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.85;
}

.about-bio p + p { margin-top: 1.2rem; }
.about-bio strong { color: var(--text); font-weight: 600; }

/* Education Timeline */
.edu-timeline {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.edu-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.edu-year {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.04em;
  padding-top: 0.25rem;
  line-height: 1.4;
}

.edu-content {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.edu-title {
  font-family: var(--font-heading);
  font-size: 0.975rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.edu-sub {
  font-size: 0.85rem;
  color: var(--text-2);
  margin-bottom: 0.75rem;
}

.edu-badges { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.edu-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-3);
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
  border-radius: 2px;
}

/* Skills grid on About */
.skills-section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.skill-block { padding: 1.5rem; background: var(--bg); }

.skill-block-title {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.9rem;
}

.skill-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }

/* =============================================
   LANGUAGE BARS
   ============================================= */
.lang-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.lang-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 0.3rem 0.75rem;
}

.lang-meta {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.lang-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.lang-level {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
}

.lang-pct {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
  grid-row: 1;
  grid-column: 2;
}

.lang-bar {
  grid-column: 1 / -1;
  height: 1px;
  background: var(--surface3);
  overflow: visible;
}

.lang-fill {
  height: 100%;
  background: var(--text-2);
  width: 0;
  transition: width 1s var(--ease);
}

/* =============================================
   EXTRACURRICULARS
   ============================================= */
.extra-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.extra-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

.extra-role {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.4rem;
}

.extra-org {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.extra-period {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
  margin-bottom: 0.75rem;
}

.extra-desc {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.7;
}

/* =============================================
   CONTACT PAGE
   ============================================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.contact-heading {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 0.75rem;
  line-height: 1.1;
}

.contact-tagline {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-links { display: flex; flex-direction: column; gap: 0.6rem; }

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color var(--transition), background var(--transition);
  color: inherit;
}

.contact-link-item:hover {
  border-color: var(--border-h);
  background: var(--surface2);
}

.contact-link-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-2);
  flex-shrink: 0;
}

.contact-link-icon svg { width: 15px; height: 15px; }

.contact-link-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  display: block;
  margin-bottom: 0.1rem;
}

.contact-link-value {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
}

/* =============================================
   CONTACT FORM
   ============================================= */
.contact-form-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 2rem;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
}

.form-input,
.form-textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem 1rem;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  width: 100%;
  transition: border-color var(--transition);
  outline: none;
  resize: none;
  min-height: 44px;
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-3); }

.form-input:focus,
.form-textarea:focus { border-color: var(--border-h); }

.form-note {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  text-align: center;
  margin-top: 0.75rem;
  letter-spacing: 0.04em;
}

/* =============================================
   SOCIAL BUTTONS
   ============================================= */
.social-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-3);
  transition: all var(--transition);
}

.social-btn svg { width: 16px; height: 16px; }

.social-btn:hover {
  color: var(--text);
  border-color: var(--border-h);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-2);
  letter-spacing: 0.06em;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.footer-links { display: flex; gap: 0; }

.footer-link {
  font-size: 0.8rem;
  color: var(--text-3);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius);
  transition: color var(--transition);
}

.footer-link:hover { color: var(--text-2); }

.footer-social { display: flex; gap: 0.4rem; }

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 2rem 0;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

/* =============================================
   404 PAGE
   ============================================= */
.not-found {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--nav-h) 2rem 4rem;
}

.not-found-content { text-align: center; }

.not-found-code {
  font-family: var(--font-heading);
  font-size: clamp(7rem, 20vw, 14rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 1;
  display: block;
  color: transparent;
  -webkit-text-stroke: 1px var(--surface3);
  margin-bottom: 1.5rem;
}

.not-found-title {
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.not-found-desc {
  color: var(--text-2);
  margin-bottom: 2.5rem;
  font-size: 0.95rem;
}

.not-found-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* =============================================
   NO RESULTS
   ============================================= */
.no-results {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  grid-column: 1 / -1;
}

/* =============================================
   ANIMATIONS
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  animation: fadeUp 0.6s var(--ease) forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.05s; }
.fade-in:nth-child(2) { animation-delay: 0.13s; }
.fade-in:nth-child(3) { animation-delay: 0.21s; }
.fade-in:nth-child(4) { animation-delay: 0.29s; }
.fade-in:nth-child(5) { animation-delay: 0.37s; }
.fade-in:nth-child(6) { animation-delay: 0.45s; }

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

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease) var(--delay, 0s),
              transform 0.6s var(--ease) var(--delay, 0s);
}

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

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .about-grid     { grid-template-columns: 1fr; gap: 3.5rem; }
  .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
  :root { --nav-h: 56px; }

  /* Full-screen overlay nav */
  .nav-links {
    position: fixed;
    inset: 0;
    background: var(--bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    transform: translateX(100%);
    transition: transform var(--dur-slow) var(--ease);
    z-index: 999;
    list-style: none;
  }

  .nav-links.open { transform: translateX(0); }

  .nav-links .nav-link {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-2);
    padding: 0.6rem 1.5rem;
  }

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

  .nav-links .nav-link.active::after { display: none; }

  .nav-resume { display: none; }
  .nav-toggle { display: flex; }

  .hero { padding-top: calc(var(--nav-h) + 3rem); }
  .page-hero { padding-top: calc(var(--nav-h) + 3rem); }

  .projects-grid,
  .projects-grid-full { grid-template-columns: 1fr; }

  .project-card--featured {
    flex-direction: column;
    gap: 1rem;
  }

  .section { padding: 5rem 0; }
  .container { padding: 0 1.25rem; }

  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .footer-links { flex-wrap: wrap; }
  .skills-section-grid { grid-template-columns: 1fr 1fr; }
  .edu-item { grid-template-columns: 1fr; gap: 0.5rem; }
  .edu-year { padding-top: 0; }
}

@media (max-width: 480px) {
  .hero-name { font-size: clamp(3.2rem, 16vw, 5rem); }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .skills-section-grid { grid-template-columns: 1fr; }
  .extra-grid { grid-template-columns: 1fr; }
}

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

  .fade-in { opacity: 1; transform: none; animation: none; }
  .reveal  { opacity: 1; transform: none; transition: none; }
  .lang-fill    { transition: none; }
  .marquee-track { animation: none; }
  html { scroll-behavior: auto; }
}