/* ============================================================
   KENVA LAB — AI Projects Hub
   Design System · v1.0
   ============================================================ */

/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  /* Palette */
  --bg:            #050508;
  --bg-2:          #0b0b14;
  --surface:       rgba(255, 255, 255, 0.03);
  --surface-hover: rgba(255, 255, 255, 0.055);
  --border:        rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.13);

  --indigo:        #6366f1;
  --indigo-light:  #818cf8;
  --violet:        #a855f7;
  --cyan:          #00d4ff;
  --green:         #4ade80;

  --text:          #f0f0f8;
  --text-2:        rgba(240, 240, 248, 0.55);
  --text-3:        rgba(240, 240, 248, 0.25);

  /* Gradients */
  --grad:          linear-gradient(135deg, #6366f1, #a855f7, #00d4ff);
  --grad-subtle:   linear-gradient(135deg, rgba(99,102,241,.12), rgba(0,212,255,.04));

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

  /* Spacing */
  --s1:  4px;  --s2:  8px;  --s3:  12px; --s4:  16px;
  --s5:  20px; --s6:  24px; --s8:  32px; --s10: 40px;
  --s12: 48px; --s16: 64px; --s20: 80px; --s24: 96px;
  --s32: 128px;

  /* Shape */
  --r-sm: 8px; --r-md: 12px; --r-lg: 16px;
  --r-xl: 22px; --r-pill: 9999px;

  /* Elevation */
  --shadow-card: 0 1px 0 rgba(255,255,255,.04), 0 24px 48px rgba(0,0,0,.5);
  --glow-indigo: 0 0 40px rgba(99,102,241,.18);

  /* Motion */
  --ease: cubic-bezier(.4, 0, .2, 1);
  --ease-out: cubic-bezier(.0, 0, .2, 1);
  --fast: 150ms; --base: 260ms; --slow: 420ms;

  /* Layout */
  --nav-h:  72px;
  --max-w: 1140px;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}

ul { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
em { font-style: italic; }
button { cursor: pointer; font-family: var(--font); }

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(99,102,241,.4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--indigo); }
::selection { background: rgba(99,102,241,.28); color: var(--text); }

/* ── Layout helpers ────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--s6);
}

/* ── Canvas background ─────────────────────────────────────── */
#neural-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .55;
}

/* ── Gradient utilities ────────────────────────────────────── */
.grad-text {
  background: var(--grad);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.grad-animate { animation: gradShift 5s ease infinite; }

@keyframes gradShift {
  0%,100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}

/* ── Dot indicator ─────────────────────────────────────────── */
.dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot--green {
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: dotPulse 2.2s ease infinite;
}
.dot--sm { width: 5px; height: 5px; }

@keyframes dotPulse {
  0%,100% { opacity: 1; box-shadow: 0 0 8px var(--green); }
  50%      { opacity: .5; box-shadow: 0 0 3px var(--green); }
}

/* ── Cursor (typing) ───────────────────────────────────────── */
.cursor {
  color: var(--cyan);
  animation: blink 1s step-end infinite;
  font-weight: 300;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* ── Entry animations ──────────────────────────────────────── */
.anim-fade-down {
  animation: fadeDown .7s var(--ease-out) both;
}
.anim-fade-up {
  animation: fadeUp .8s var(--ease-out) both;
}
.d1 { animation-delay: .12s; }
.d2 { animation-delay: .22s; }
.d3 { animation-delay: .34s; }

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .75s var(--ease), transform .75s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal.d1 { transition-delay: .1s; }
.reveal.d2 { transition-delay: .2s; }


/* ════════════════════════════════════════════
   NAVIGATION
════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  height: var(--nav-h);
  transition: background var(--base) var(--ease),
              border-color var(--base) var(--ease),
              backdrop-filter var(--base) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5,5,8,.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom-color: var(--border);
}
.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s6);
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--s2);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -.025em;
  flex-shrink: 0;
}
.nav__logo em {
  font-style: normal;
  background: var(--grad);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradShift 5s ease infinite;
}

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--s8);
}
.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: .01em;
  transition: color var(--fast);
}
.nav__link:hover { color: var(--text); }

/* CTA */
.nav__cta { margin-left: auto; }

/* Hamburger (mobile) */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: var(--s2);
}
.nav__hamburger span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--text-2);
  border-radius: 2px;
  transition: all var(--base);
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }


/* ════════════════════════════════════════════
   BUTTONS
════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  padding: 12px var(--s6);
  border-radius: var(--r-pill);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -.01em;
  border: none;
  cursor: pointer;
  transition: all var(--base) var(--ease);
  white-space: nowrap;
}
.btn--sm { font-size: 13px; padding: 8px 16px; }

.btn--primary {
  background: var(--indigo);
  color: #fff;
}
.btn--primary:hover {
  background: var(--indigo-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(99,102,241,.4);
}

.btn--ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border-strong);
}
.btn--ghost:hover {
  color: var(--text);
  border-color: rgba(255,255,255,.22);
  background: var(--surface-hover);
}

.btn--outline {
  background: rgba(99,102,241,.1);
  border: 1px solid rgba(99,102,241,.28);
  color: var(--indigo-light);
}
.btn--outline:hover {
  background: rgba(99,102,241,.18);
  border-color: rgba(99,102,241,.5);
}


/* ════════════════════════════════════════════
   HERO
════════════════════════════════════════════ */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

/* Background glow */
.hero__radial {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% -5%, rgba(99,102,241,.14) 0%, transparent 65%),
    radial-gradient(ellipse 45% 55% at 85% 55%, rgba(168,85,247,.07) 0%, transparent 60%),
    radial-gradient(ellipse 55% 45% at 15% 80%, rgba(0,212,255,.05) 0%, transparent 60%);
  pointer-events: none;
}

/* Grid overlay */
.hero__grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 75%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  padding: var(--s20) 0 var(--s16);
}

/* Badge */
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  padding: 6px 14px;
  background: rgba(99,102,241,.08);
  border: 1px solid rgba(99,102,241,.22);
  border-radius: var(--r-pill);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--indigo-light);
  margin-bottom: var(--s6);
}

/* Headline */
.hero__title {
  font-size: clamp(46px, 7.5vw, 92px);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: 1.03;
  margin-bottom: var(--s6);
}

/* Subtitle */
.hero__sub {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-2);
  max-width: 540px;
  margin-bottom: var(--s10);
  min-height: 1.65em;
}
.typed { color: var(--cyan); font-weight: 500; }

/* CTAs */
.hero__ctas {
  display: flex;
  align-items: center;
  gap: var(--s4);
  margin-bottom: var(--s16);
  flex-wrap: wrap;
}

/* Stats */
.hero__stats {
  display: flex;
  align-items: center;
  gap: var(--s8);
  flex-wrap: wrap;
}
.hero__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero__stat strong {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -.025em;
  line-height: 1;
}
.hero__stat span {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--text-3);
}
.hero__stat-sep {
  width: 1px;
  height: 44px;
  background: var(--border-strong);
  flex-shrink: 0;
}

/* Scroll hint */
.hero__scroll-hint {
  position: absolute;
  bottom: var(--s8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s2);
  color: var(--text-3);
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  animation: fadeUp 1s ease 1.2s both;
}
.scroll-line {
  width: 1px;
  height: 44px;
  background: linear-gradient(to bottom, transparent, var(--indigo));
  animation: scrollDrop 2.4s ease infinite;
}
@keyframes scrollDrop {
  0%   { transform: scaleY(0); transform-origin: top; }
  49%  { transform: scaleY(1); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}


/* ════════════════════════════════════════════
   SECTION SHARED
════════════════════════════════════════════ */
.section {
  position: relative;
  z-index: 1;
  padding: var(--s32) var(--s6);
}

.section__header {
  max-width: 580px;
  margin-bottom: var(--s12);
}

.section__label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--indigo);
  margin-bottom: var(--s3);
}

.section__title {
  font-size: clamp(30px, 4.5vw, 52px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.08;
  margin-bottom: var(--s4);
}

.section__sub {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.75;
}

/* Grid texture */
.section__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,.025) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}


/* ════════════════════════════════════════════
   CARDS
════════════════════════════════════════════ */
.card {
  position: relative;
  border-radius: var(--r-xl);
  border: 1px solid var(--border);
  background: rgba(11,11,20,.65);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
  transition: border-color var(--slow) var(--ease),
              transform var(--slow) var(--ease),
              box-shadow var(--slow) var(--ease);
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-5px);
  box-shadow: var(--shadow-card), var(--glow-indigo);
}

/* Featured card gradient border */
.card--featured {
  margin-bottom: var(--s5);
  border-color: rgba(99,102,241,.2);
}
.card__border-fx {
  position: absolute;
  inset: 0;
  border-radius: var(--r-xl);
  padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: .35;
  pointer-events: none;
  transition: opacity var(--slow);
}
.card--featured:hover .card__border-fx { opacity: .75; }

/* Mouse-follow glow */
.card__glow-fx {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 50%, rgba(99,102,241,.1) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--base);
}
.card--featured:hover .card__glow-fx { opacity: 1; }

/* Card body */
.card__body {
  padding: var(--s10);
  position: relative;
  z-index: 1;
}

.card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--s6);
}

.card__icon {
  width: 60px; height: 60px;
  background: rgba(99,102,241,.1);
  border: 1px solid rgba(99,102,241,.22);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--base), border-color var(--base);
}
.card--featured:hover .card__icon {
  background: rgba(99,102,241,.18);
  border-color: rgba(99,102,241,.4);
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--s2);
}

.card__title {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -.025em;
  margin-bottom: var(--s3);
  line-height: 1.1;
}
.card__title--dim {
  color: var(--text-3);
  font-size: 20px;
}

.card__desc {
  font-size: 15.5px;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: var(--s6);
  max-width: 680px;
}
.card__desc--dim {
  color: var(--text-3);
  font-size: 14px;
}
.card__desc em { color: var(--text); font-weight: 500; }

/* Tags */
.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
  margin-bottom: var(--s6);
}
.tag {
  padding: 4px 12px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-2);
  font-family: var(--mono);
  transition: all var(--fast);
}
.tag:hover {
  background: rgba(99,102,241,.1);
  border-color: rgba(99,102,241,.3);
  color: var(--indigo-light);
}

/* Card footer */
.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s5);
  border-top: 1px solid var(--border);
  gap: var(--s4);
}

.card__cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--indigo-light);
  transition: color var(--fast), gap var(--fast);
}
.card__cta:hover {
  color: var(--cyan);
  gap: 10px;
}

/* Tech stack pills */
.tech-stack { display: flex; gap: var(--s2); align-items: center; }
.tech-pill {
  padding: 3px 9px;
  background: rgba(var(--c),0.1);
  background: color-mix(in srgb, var(--c) 14%, transparent);
  border-radius: var(--r-pill);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--c);
  font-family: var(--mono);
  border: 1px solid color-mix(in srgb, var(--c) 30%, transparent);
}

/* Coming soon card */
.card--soon {
  border-style: dashed;
  border-color: rgba(255,255,255,.06);
  background: rgba(255,255,255,.01);
}
.card--soon:hover {
  border-style: solid;
  border-color: rgba(99,102,241,.22);
}
.card__soon-icon {
  margin-bottom: var(--s6);
}

/* Projects grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--s5);
}

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.badge--live {
  background: rgba(74,222,128,.1);
  color: var(--green);
  border: 1px solid rgba(74,222,128,.22);
}
.badge--year {
  color: var(--text-3);
  font-family: var(--mono);
  border: 1px solid var(--border);
  background: transparent;
}


/* ════════════════════════════════════════════
   ABOUT SECTION
════════════════════════════════════════════ */
.about-section {
  background: rgba(13,13,22,.5);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about__ambient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 60% at 20% 50%, rgba(99,102,241,.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 50%, rgba(0,212,255,.04) 0%, transparent 60%);
  pointer-events: none;
}

.about__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s20);
  align-items: center;
}

.about__copy .section__label { margin-bottom: var(--s3); }

.about__text {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: var(--s5);
}
.about__text em {
  color: var(--text);
  font-style: italic;
}
.about__copy .btn { margin-top: var(--s2); }

/* Values grid */
.values-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s4);
}
.value-card {
  padding: var(--s6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: all var(--base);
}
.value-card:hover {
  background: rgba(99,102,241,.06);
  border-color: rgba(99,102,241,.18);
  transform: translateY(-3px);
}
.value-icon {
  font-size: 22px;
  margin-bottom: var(--s3);
  line-height: 1;
}
.value-card h4 {
  font-size: 14.5px;
  font-weight: 600;
  margin-bottom: var(--s2);
  letter-spacing: -.01em;
}
.value-card p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.6;
}


/* ════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════ */
.footer {
  position: relative;
  z-index: 1;
  padding: var(--s12) var(--s6);
}
.footer__inner { display: flex; flex-direction: column; gap: var(--s8); }

.footer__main {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--s8);
  padding-bottom: var(--s8);
  border-bottom: 1px solid var(--border);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--s3);
}
.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: var(--s2);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -.02em;
}
.footer__logo em {
  font-style: normal;
  background: var(--grad);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradShift 5s ease infinite;
}
.footer__brand p {
  font-size: 13px;
  color: var(--text-3);
}

.footer__nav {
  display: flex;
  gap: var(--s16);
}
.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--s3);
}
.footer__col h5 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: var(--s1);
}
.footer__col a {
  font-size: 13.5px;
  color: var(--text-2);
  transition: color var(--fast);
}
.footer__col a:hover { color: var(--text); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: var(--text-3);
}
.footer__built {
  letter-spacing: .04em;
}


/* ════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════ */
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(5,5,8,.97);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: var(--s6);
    gap: var(--s6);
    z-index: 199;
    animation: fadeDown .2s ease both;
  }
  .nav__hamburger { display: flex; }

  .about__grid { grid-template-columns: 1fr; gap: var(--s12); }

  .footer__main { flex-direction: column; }
  .footer__bottom { flex-direction: column; gap: var(--s3); text-align: center; }
}

@media (max-width: 600px) {
  .hero__ctas { flex-direction: column; align-items: flex-start; }
  .hero__stat-sep:nth-child(4) { display: none; }
  .values-grid { grid-template-columns: 1fr; }
  .card__body { padding: var(--s6); }
  .card__title { font-size: 24px; }
  .footer__nav { gap: var(--s8); }
  .section { padding: var(--s20) var(--s4); }
}