/* =========================================================
   OMEDIOS — Futuristic Electronic-Tech Portfolio
   Token system:
   bg        #05070a  near-black base
   surface   rgba(10,22,32,.55) glass panels
   cyan      #29f6ff  primary accent
   blue      #3d7cff  secondary accent
   violet    #7b5cff  tertiary accent (KRD AI)
   text      #e7f6fb  primary text
   muted     #7fa0ad  secondary text
   ========================================================= */

:root {
  --bg: #05070a;
  --bg-alt: #070c11;
  --surface: rgba(12, 24, 34, 0.55);
  --surface-strong: rgba(14, 28, 40, 0.75);
  --border: rgba(122, 214, 255, 0.14);
  --border-strong: rgba(122, 214, 255, 0.3);

  --cyan: #29f6ff;
  --blue: #3d7cff;
  --violet: #8a6bff;

  --text: #e7f6fb;
  --muted: #83a4b1;
  --muted-dim: #4f6a75;

  --grad-primary: linear-gradient(135deg, var(--cyan), var(--blue));
  --grad-radial: radial-gradient(circle at 30% 20%, rgba(41, 246, 255, 0.12), transparent 60%);

  --shadow-glow: 0 0 24px rgba(41, 246, 255, 0.25);
  --shadow-glow-soft: 0 0 40px rgba(61, 124, 255, 0.15);

  --radius: 18px;
  --radius-sm: 10px;

  --font-display: 'Orbitron', 'Space Grotesk', sans-serif;
  --font-body: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * , *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

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

::selection { background: rgba(41, 246, 255, 0.3); color: #fff; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--cyan), var(--blue)); border-radius: 10px; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(1180px, 90%);
  margin-inline: auto;
}

/* ===== Background layers ===== */
#bg-grid {
  position: fixed;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
  background: var(--bg);
}

.noise-overlay {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background: var(--grad-radial);
  opacity: 0.9;
}

.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(41, 246, 255, 0.07), transparent 70%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: -1;
  transition: opacity 0.4s ease;
  will-change: transform;
}

@media (hover: none) {
  .cursor-glow { display: none; }
}

/* ===== Glass utility ===== */
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-radius: var(--radius);
}

.card {
  padding: 2rem;
  transition: transform 0.45s var(--ease), border-color 0.3s ease, box-shadow 0.4s ease;
}

/* ===== Reveal on scroll ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.3s var(--ease), box-shadow 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--grad-primary);
  color: #041014;
  box-shadow: 0 0 0 rgba(41, 246, 255, 0);
}
.btn-primary:hover {
  box-shadow: 0 8px 30px rgba(41, 246, 255, 0.35);
}

.btn-outline {
  border-color: var(--border-strong);
  color: var(--text);
  background: rgba(41, 246, 255, 0.04);
}
.btn-outline:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 24px rgba(41, 246, 255, 0.18);
}

.btn-ghost {
  padding: 0.6rem 1.3rem;
  border: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}
.btn-ghost:hover {
  color: var(--cyan);
  border-color: var(--border-strong);
}

/* ===== Nav ===== */
.nav-wrap {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1rem clamp(1rem, 4vw, 2.5rem) 0;
}

.nav {
  max-width: 1240px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 0.9rem 0.7rem 1.2rem;
  border-radius: 999px;
  transition: box-shadow 0.4s ease, border-color 0.4s ease;
}

.nav.scrolled {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  border-color: var(--border-strong);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--cyan);
}

.logo-mark { color: var(--cyan); filter: drop-shadow(0 0 6px rgba(41, 246, 255, 0.6)); }

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  color: var(--text);
}
.logo-text.small { font-size: 0.95rem; color: var(--cyan); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.9rem;
}

.nav-link {
  font-size: 0.88rem;
  color: var(--muted);
  position: relative;
  padding: 0.3rem 0.1rem;
  transition: color 0.25s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--grad-primary);
  transition: width 0.3s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-cta { flex-shrink: 0; }

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  align-items: center;
}
.burger span {
  width: 16px;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s ease;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  overflow: hidden;
}

.hero-scanline {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(41, 246, 255, 0.55), transparent);
  top: 0;
  animation: scan 7s linear infinite;
  pointer-events: none;
}
@keyframes scan {
  0% { top: -5%; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 105%; opacity: 0; }
}

.hero-inner { position: relative; z-index: 2; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid var(--border);
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: rgba(41, 246, 255, 0.05);
  margin-bottom: 1.6rem;
}

.dot-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  position: relative;
  flex-shrink: 0;
}
.dot-pulse::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  animation: pulse-ring 1.8s ease-out infinite;
}
@keyframes pulse-ring {
  0% { transform: scale(0.6); opacity: 0.8; }
  100% { transform: scale(2.4); opacity: 0; }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 11vw, 7.5rem);
  line-height: 0.95;
  letter-spacing: 0.02em;
  margin-bottom: 1.6rem;
}

.glitch-wrap {
  position: relative;
  display: inline-block;
  background: linear-gradient(120deg, var(--text) 30%, var(--cyan) 55%, var(--blue) 75%, var(--text) 100%);
  background-size: 250% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sheen 6s ease-in-out infinite;
  text-shadow: 0 0 50px rgba(41, 246, 255, 0.18);
}
@keyframes sheen {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-sub {
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  margin-bottom: 2.3rem;
}

.accent-text {
  color: var(--cyan);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: clamp(1.4rem, 4vw, 3.2rem);
}

.stat { display: flex; flex-direction: column; gap: 0.2rem; }

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
}
.stat-plus {
  font-family: var(--font-display);
  color: var(--cyan);
  font-weight: 700;
  font-size: 1.2rem;
  margin-left: 2px;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--muted-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.scroll-cue {
  position: absolute;
  bottom: 2.2rem;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 1.5px solid var(--border-strong);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-cue span {
  width: 4px;
  height: 8px;
  border-radius: 3px;
  background: var(--cyan);
  animation: cue 1.8s ease-in-out infinite;
}
@keyframes cue {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { opacity: 0; }
}

/* ===== Sections ===== */
.section { padding: clamp(5rem, 10vw, 8rem) 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(41, 246, 255, 0.025), transparent); }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 0.9rem;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin-bottom: 3rem;
  max-width: 720px;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.about-text { color: var(--muted); margin-bottom: 1.1rem; }
.about-text:last-of-type { margin-bottom: 1.6rem; }

.about-tags { display: flex; flex-wrap: wrap; gap: 0.6rem; }

.tag {
  font-size: 0.78rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--cyan);
  background: rgba(41, 246, 255, 0.04);
}

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

.about-visual {
  position: relative;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.orbit-ring {
  position: absolute;
  border: 1px solid var(--border);
  border-radius: 50%;
  animation: spin linear infinite;
}
.ring-1 { width: 300px; height: 300px; animation-duration: 30s; }
.ring-2 { width: 220px; height: 220px; border-color: var(--border-strong); animation-duration: 22s; animation-direction: reverse; }
.ring-3 { width: 150px; height: 150px; animation-duration: 14s; }
@keyframes spin { to { transform: rotate(360deg); } }

.orbit-core {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  background: radial-gradient(circle, rgba(41, 246, 255, 0.14), transparent 70%);
  box-shadow: 0 0 40px rgba(41, 246, 255, 0.3);
}

.orbit-dot {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}
.dot-a { top: 10%; left: 50%; animation: spin 30s linear infinite; transform-origin: 0 150px; }
.dot-b { top: 50%; left: 8%; background: var(--blue); box-shadow: 0 0 10px var(--blue); animation: spin 22s linear infinite reverse; transform-origin: 110px 0; }
.dot-c { bottom: 12%; right: 20%; animation: spin 14s linear infinite; transform-origin: -30px -75px; }

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}
div.skill-icon:not(.skill-head .skill-icon) { display: none; }

.skill-head {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.9rem;
}
.skill-head h3 { font-size: 1.05rem; font-family: var(--font-display); font-weight: 500; }

.skill-icon {
  font-size: 1.3rem;
  color: var(--cyan);
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(41, 246, 255, 0.08);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.skill-card p { color: var(--muted); font-size: 0.92rem; margin-bottom: 1.3rem; }

.skill-bar {
  height: 5px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.skill-bar span {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 4px;
  background: var(--grad-primary);
  transition: width 1.4s var(--ease);
}
.skill-bar.in-view span { width: var(--val); }

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.8rem;
}

.project-card { position: relative; overflow: hidden; }

.project-glow {
  position: absolute;
  top: -60%;
  right: -30%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(41, 246, 255, 0.16), transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s ease;
}
.project-card:hover .project-glow { opacity: 1; }

.project-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  border: 1px solid var(--border);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.project-card h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; margin-bottom: 0.7rem; }
.project-card p { color: var(--muted); margin-bottom: 1.2rem; font-size: 0.95rem; }

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.4rem;
}
.project-stack span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
}

.project-link {
  color: var(--cyan);
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
  transition: gap 0.3s ease;
}
.project-link:hover { gap: 0.7rem; }

/* ===== KRD AI ===== */
.section-feature {
  background: radial-gradient(ellipse at 80% 30%, rgba(138, 107, 255, 0.1), transparent 55%);
}

.krd-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.krd-text { color: var(--muted); margin: 1.3rem 0 1.6rem; max-width: 520px; }

.krd-features { display: flex; flex-direction: column; gap: 0.9rem; margin-bottom: 2rem; }
.krd-features li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text);
  font-size: 0.95rem;
}
.krd-bullet {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--violet);
  box-shadow: 0 0 10px var(--violet);
  flex-shrink: 0;
  transform: rotate(45deg);
}

.krd-visual { display: flex; justify-content: center; }

.krd-core {
  position: relative;
  width: min(420px, 100%);
  aspect-ratio: 1;
  border-radius: 50%;
  overflow: hidden;
  border-color: rgba(138, 107, 255, 0.35);
  box-shadow: 0 0 80px rgba(138, 107, 255, 0.15), inset 0 0 60px rgba(41, 246, 255, 0.06);
}

.krd-core canvas { width: 100%; height: 100%; display: block; }

.krd-core-label {
  position: absolute;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  text-align: center;
}
.krd-core-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
  background: rgba(5, 7, 10, 0.6);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.krd-core-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--text);
}

/* ===== Courses ===== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.6rem;
}

.course-level {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}
.course-card h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.1rem; margin-bottom: 0.6rem; }
.course-card p { color: var(--muted); font-size: 0.88rem; margin-bottom: 1.3rem; }
.course-meta {
  display: flex;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--muted-dim);
  font-family: var(--font-mono);
}

/* ===== Games ===== */
.games-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.game-thumb {
  width: 100%;
  height: 130px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(41, 246, 255, 0.08), rgba(61, 124, 255, 0.08));
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.4rem;
  color: var(--cyan);
  margin-bottom: 1.3rem;
  text-shadow: 0 0 20px rgba(41, 246, 255, 0.5);
}

.game-card h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.15rem; margin-bottom: 0.6rem; }
.game-card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.1rem; }
.game-tags { display: flex; gap: 0.5rem; }
.game-tags span {
  font-size: 0.72rem;
  color: var(--blue);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 2rem;
  align-items: start;
}

.contact-info p { color: var(--muted); margin-bottom: 1.6rem; }

.contact-list { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.8rem; }
.contact-list li {
  display: flex;
  justify-content: space-between;
  font-size: 0.92rem;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 0.8rem;
}
.contact-label { color: var(--muted-dim); text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.08em; align-self: center; }
.contact-list li span:last-child { display: inline-flex; align-items: center; gap: 0.4rem; }

.contact-social { display: flex; gap: 0.7rem; }
.contact-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--muted);
  transition: all 0.3s ease;
}
.contact-social a:hover {
  color: var(--cyan);
  border-color: var(--border-strong);
  box-shadow: 0 0 16px rgba(41, 246, 255, 0.25);
  transform: translateY(-3px);
}

.form-row { margin-bottom: 1.3rem; display: flex; flex-direction: column; gap: 0.5rem; }
.form-row label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted-dim);
}
.form-row input, .form-row textarea {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  font-size: 0.95rem;
  color: var(--text);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  resize: vertical;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(41, 246, 255, 0.12);
}
.form-row input:invalid:not(:placeholder-shown),
.form-row textarea:invalid:not(:placeholder-shown) {
  border-color: #ff6b6b;
}

.form-submit { width: 100%; justify-content: center; border: none; }
.form-status {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--cyan);
  min-height: 1.2em;
}
.form-status.error { color: #ff6b6b; }

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 2.4rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer p { color: var(--muted-dim); font-size: 0.85rem; }

.to-top {
  position: fixed;
  bottom: 1.8rem;
  right: 1.8rem;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--surface-strong);
  backdrop-filter: blur(10px);
  color: var(--cyan);
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.35s var(--ease);
  z-index: 90;
}
.to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { box-shadow: 0 0 20px rgba(41, 246, 255, 0.3); transform: translateY(-3px); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-visual { height: 240px; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .courses-grid { grid-template-columns: repeat(2, 1fr); }
  .games-grid { grid-template-columns: repeat(2, 1fr); }
  .krd-grid { grid-template-columns: 1fr; }
  .krd-visual { order: -1; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); row-gap: 1.8rem; }
}

@media (max-width: 780px) {
  .nav-links {
    position: fixed;
    top: 5.2rem;
    right: 1rem;
    left: 1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface-strong);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.6rem;
    backdrop-filter: blur(22px);
    transform: translateY(-14px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.35s var(--ease);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .nav-links li { width: 100%; }
  .nav-link {
    display: block;
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm);
  }
  .nav-link::after { display: none; }
  .nav-link.active, .nav-link:hover { background: rgba(41, 246, 255, 0.08); }

  .nav-cta { display: none; }
  .burger { display: flex; }

  .skills-grid { grid-template-columns: 1fr; }
  .courses-grid { grid-template-columns: 1fr; }
  .games-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
}

@media (max-width: 480px) {
  .hero-title { letter-spacing: 0; }
  .card { padding: 1.5rem; }
  .to-top { right: 1rem; bottom: 1.2rem; width: 42px; height: 42px; }
}


/* ===== KRD AI CHAT LAB ===== */
.ai-lab-section{position:relative;overflow:hidden}
.ai-lab-section::before{content:"";position:absolute;inset:10% -20% auto;height:420px;background:radial-gradient(circle,rgba(41,246,255,.10),transparent 62%);pointer-events:none}
.ai-lab-head{display:flex;align-items:end;justify-content:space-between;gap:2rem;margin-bottom:2.4rem;position:relative}
.ai-lab-intro{max-width:720px;color:var(--text-muted);line-height:1.8;margin-top:.8rem}
.ai-status-pill{border:1px solid rgba(41,246,255,.25);background:rgba(41,246,255,.05);padding:.65rem 1rem;border-radius:999px;color:#9ffaff;font-family:'JetBrains Mono',monospace;font-size:.72rem;letter-spacing:.08em;white-space:nowrap}
.ai-console{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:620px;overflow:hidden;position:relative;border:1px solid rgba(41,246,255,.16)}
.ai-console-side{padding:2rem;background:linear-gradient(180deg,rgba(8,18,25,.95),rgba(5,9,14,.92));border-right:1px solid rgba(41,246,255,.12);display:flex;flex-direction:column;gap:.75rem}
.ai-brand-orb{width:72px;height:72px;border:1px solid rgba(41,246,255,.45);border-radius:50%;display:grid;place-items:center;margin-bottom:.5rem;box-shadow:0 0 35px rgba(41,246,255,.13),inset 0 0 25px rgba(41,246,255,.08);position:relative}
.ai-brand-orb::before{content:"";position:absolute;inset:8px;border:1px dashed rgba(138,107,255,.55);border-radius:50%;animation:spin 10s linear infinite}
.ai-brand-orb span{font-family:'Orbitron',sans-serif;font-size:1.5rem;color:#dffcff;text-shadow:0 0 15px rgba(41,246,255,.8)}
.ai-kicker{font:500 .62rem 'JetBrains Mono',monospace;letter-spacing:.12em;color:#68dce7}
.ai-console-side h3{font:700 1.5rem 'Orbitron',sans-serif;letter-spacing:.06em;margin:.15rem 0 1rem;color:#eaffff}
.ai-console-side p{font:400 .78rem 'JetBrains Mono',monospace;color:#718b95;margin:0}
.ai-console-side p strong{color:#b7faff;font-weight:500}
.ai-side-line{height:1px;background:linear-gradient(90deg,rgba(41,246,255,.3),transparent);margin:1rem 0}
.ai-side-note{margin-top:auto;padding:1rem;border:1px solid rgba(138,107,255,.16);background:rgba(138,107,255,.04);color:#71828b;font-size:.72rem;line-height:1.65;border-radius:12px}
.ai-chat-shell{display:flex;flex-direction:column;min-width:0;background:rgba(3,7,11,.72)}
.ai-chat-topbar{height:54px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 1.25rem;border-bottom:1px solid rgba(255,255,255,.06);font:500 .68rem 'JetBrains Mono',monospace;color:#89a5ae;letter-spacing:.08em}
.ai-chat-topbar>div{display:flex;gap:5px}.terminal-dot{width:7px;height:7px;border-radius:50%;background:#1d5158;box-shadow:0 0 7px rgba(41,246,255,.3)}
.ai-live-label{justify-self:end;color:#6cf5bd;font-size:.62rem}
.ai-messages{flex:1;overflow:auto;padding:1.6rem;display:flex;flex-direction:column;gap:1rem;min-height:390px;max-height:430px;background-image:linear-gradient(rgba(41,246,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(41,246,255,.025) 1px,transparent 1px);background-size:38px 38px}
.ai-message{display:flex;gap:.75rem;max-width:88%;animation:aiIn .25s ease both}.ai-message-user{align-self:flex-end;flex-direction:row-reverse}.ai-avatar{width:32px;height:32px;flex:0 0 32px;border:1px solid rgba(41,246,255,.3);display:grid;place-items:center;border-radius:8px;color:#bdfaff;font:700 .75rem 'Orbitron',sans-serif;background:rgba(41,246,255,.06)}
.ai-message-user .ai-avatar{border-color:rgba(138,107,255,.35);background:rgba(138,107,255,.08);color:#ddd3ff}
.ai-bubble{padding:.8rem .95rem;border:1px solid rgba(255,255,255,.07);background:rgba(8,15,21,.82);border-radius:4px 14px 14px 14px;color:#c4d5da;line-height:1.65;font-size:.86rem;box-shadow:0 10px 30px rgba(0,0,0,.15)}
.ai-message-user .ai-bubble{border-radius:14px 4px 14px 14px;border-color:rgba(138,107,255,.18);background:rgba(35,24,65,.25)}
.ai-msg-meta{display:block;font:500 .6rem 'JetBrains Mono',monospace;color:#54dbe5;letter-spacing:.08em;margin-bottom:.3rem}.ai-message-user .ai-msg-meta{color:#b7a0ff}.ai-bubble p{margin:0}
.ai-suggestions{display:flex;gap:.55rem;flex-wrap:wrap;padding:.85rem 1.4rem;border-top:1px solid rgba(255,255,255,.05)}
.ai-suggestions button{font:500 .68rem 'JetBrains Mono',monospace;color:#87a9b1;background:rgba(255,255,255,.025);border:1px solid rgba(255,255,255,.07);padding:.5rem .7rem;border-radius:8px;cursor:pointer;transition:.2s}.ai-suggestions button:hover{color:#bffcff;border-color:rgba(41,246,255,.28);background:rgba(41,246,255,.05)}
.ai-input-row{display:flex;align-items:center;gap:.7rem;padding:1rem 1.2rem;border-top:1px solid rgba(41,246,255,.1);background:rgba(2,6,9,.9)}
.ai-prompt-symbol{color:#36f0ff;font:700 1rem 'JetBrains Mono',monospace}.ai-input-row input{flex:1;min-width:0;background:transparent;border:0;outline:0;color:#eaffff;font:400 .85rem 'JetBrains Mono',monospace}.ai-input-row input::placeholder{color:#49626a}
.ai-send{border:1px solid rgba(41,246,255,.28);background:rgba(41,246,255,.07);color:#aefaff;padding:.65rem .9rem;border-radius:8px;font:600 .65rem 'JetBrains Mono',monospace;letter-spacing:.06em;cursor:pointer;transition:.2s}.ai-send:hover{background:rgba(41,246,255,.14);box-shadow:0 0 20px rgba(41,246,255,.1)}
.ai-disclaimer{margin:0;padding:0 1.2rem .9rem;color:#4f676f;font:400 .58rem 'JetBrains Mono',monospace}
@keyframes aiIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:820px){.ai-lab-head{align-items:start;flex-direction:column}.ai-console{grid-template-columns:1fr}.ai-console-side{display:none}.ai-messages{min-height:380px}.ai-chat-topbar{grid-template-columns:1fr auto 1fr}.ai-message{max-width:96%}}
@media(max-width:520px){.ai-suggestions{overflow:auto;flex-wrap:nowrap}.ai-suggestions button{white-space:nowrap}.ai-input-row{padding:.8rem}.ai-send{padding:.6rem .7rem}.ai-disclaimer{font-size:.52rem}}