/* ==========================================================================
   Ba1Kerrr — Portfolio
   ========================================================================== */

:root {
  --bg: #05070d;
  --bg-soft: #0a0e18;
  --surface: #0e1320;
  --surface-2: #131a2b;
  --border: #1e2740;
  --border-soft: #171f33;

  --text: #e8ecf7;
  --text-dim: #9aa4bf;
  --text-faint: #5d6784;

  --accent: #5eead4;
  --accent-2: #818cf8;
  --accent-3: #f472b6;
  --gradient: linear-gradient(120deg, #5eead4 0%, #818cf8 55%, #f472b6 100%);
  --gradient-soft: linear-gradient(120deg, rgba(94,234,212,.14) 0%, rgba(129,140,248,.14) 55%, rgba(244,114,182,.14) 100%);

  --success: #4ade80;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 20px 60px -20px rgba(0,0,0,.6);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-head: 'Space Grotesk', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;

  --container: 1120px;
  --nav-h: 76px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

a, button, .pill, .card {
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 15% 8%, rgba(94,234,212,.10), transparent 40%),
    radial-gradient(circle at 85% 18%, rgba(129,140,248,.12), transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(244,114,182,.08), transparent 40%),
    var(--bg);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

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

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-left: max(24px, env(safe-area-inset-left, 0px));
  padding-right: max(24px, env(safe-area-inset-right, 0px));
}

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

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient);
  color: #06090f;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -8px rgba(94,234,212,.35); }
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: rgba(255,255,255,.02);
}
.btn-ghost:hover { border-color: var(--accent-2); background: rgba(129,140,248,.08); transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
  padding-top: env(safe-area-inset-top, 0px);
  display: flex;
  align-items: center;
  background: rgba(5,7,13,.55);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border-soft);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -.01em;
}
.brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--gradient); box-shadow: 0 0 14px var(--accent); }
.brand span.slash { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  position: relative;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dim);
  transition: color .2s ease, background .2s ease;
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.04); }
.nav-links a.active { color: var(--bg); background: var(--gradient); font-weight: 600; }

.nav-right { display: flex; align-items: center; gap: 10px; }

.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
  background: rgba(255,255,255,.02);
}
.lang-toggle button {
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-faint);
  transition: all .2s ease;
}
.lang-toggle button.active { background: var(--gradient); color: #06090f; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all .25s ease; }

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--nav-h) + 96px) 0 100px;
  position: relative;
}
.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(94,234,212,.06);
  margin-bottom: 24px;
}
.eyebrow .pulse {
  width: 7px; height: 7px; border-radius: 50%; background: var(--success);
  box-shadow: 0 0 0 0 rgba(74,222,128,.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(74,222,128,.55); }
  70% { box-shadow: 0 0 0 8px rgba(74,222,128,0); }
  100% { box-shadow: 0 0 0 0 rgba(74,222,128,0); }
}

.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 4.6vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin-bottom: 22px;
}
.hero p.lead {
  font-size: 1.12rem;
  color: var(--text-dim);
  max-width: 56ch;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 46px; }

.hero-stats { display: flex; gap: 34px; flex-wrap: wrap; }
.hero-stats .stat b {
  display: block;
  font-family: var(--font-head);
  font-size: 1.7rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-stats .stat span { font-size: 0.82rem; color: var(--text-faint); }

/* Terminal card */
.terminal {
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 13px 18px;
  background: rgba(255,255,255,.02);
  border-bottom: 1px solid var(--border-soft);
}
.terminal-bar .tdot { width: 11px; height: 11px; border-radius: 50%; }
.terminal-bar .tdot:nth-child(1) { background: #ff5f57; }
.terminal-bar .tdot:nth-child(2) { background: #febc2e; }
.terminal-bar .tdot:nth-child(3) { background: #28c840; }
.terminal-bar span.tlabel { margin-left: auto; font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-faint); }
.terminal-body { padding: 22px 24px; font-family: var(--font-mono); font-size: 0.86rem; }
.terminal-body .ln { display: flex; gap: 10px; margin-bottom: 9px; }
.terminal-body .ln .no { color: var(--text-faint); user-select: none; width: 16px; text-align: right; flex-shrink: 0; }
.terminal-body .k { color: #ff79c6; }
.terminal-body .f { color: #8be9fd; }
.terminal-body .s { color: #f1fa8c; }
.terminal-body .c { color: var(--text-faint); }
.terminal-body .cursor { display: inline-block; width: 7px; height: 15px; background: var(--accent); animation: blink 1s step-end infinite; vertical-align: middle; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Sections ---------- */
section { padding: 92px 0; position: relative; }
.section-head { margin-bottom: 52px; max-width: 62ch; }
.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-2);
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}
.section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  letter-spacing: -.01em;
  margin-bottom: 14px;
}
.section-head p { color: var(--text-dim); font-size: 1.02rem; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(255,255,255,.014) 15%, rgba(255,255,255,.014) 85%, transparent); }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- Cards grid ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: linear-gradient(160deg, var(--surface), rgba(14,19,32,.4));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
  position: relative;
}
.card:hover { transform: translateY(-5px); border-color: rgba(129,140,248,.4); box-shadow: var(--shadow); }
.card .icon-badge {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  margin-bottom: 18px;
  font-size: 1.3rem;
}
.card h3 { font-family: var(--font-head); font-size: 1.12rem; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 0.94rem; }

/* ---------- Skills ---------- */
.skill-group { margin-bottom: 30px; }
.skill-group h4 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 14px;
}
.pills { display: flex; flex-wrap: wrap; gap: 9px; }
.pill {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  color: var(--text-dim);
  transition: all .2s ease;
}
.pill:hover { border-color: var(--accent); color: var(--accent); background: rgba(94,234,212,.06); transform: translateY(-2px); }
.pill.core { border-color: rgba(129,140,248,.45); color: var(--text); background: rgba(129,140,248,.08); }

/* ---------- Timeline (experience) ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 7px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), transparent);
}
.tl-item { position: relative; padding-bottom: 46px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -34px; top: 4px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent-2);
  box-shadow: 0 0 0 4px rgba(129,140,248,.12);
}
.tl-item .tl-period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 6px;
  display: block;
}
.tl-item h3 { font-family: var(--font-head); font-size: 1.28rem; margin-bottom: 2px; }
.tl-item .tl-org { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 16px; display: block; }
.tl-item ul.achievements { display: flex; flex-direction: column; gap: 10px; }
.tl-item ul.achievements li {
  position: relative;
  padding-left: 22px;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.tl-item ul.achievements li::before {
  content: "▹";
  position: absolute; left: 0; top: 0;
  color: var(--accent);
}
.tl-item ul.achievements li b, .tl-item ul.achievements li strong { color: var(--text); font-weight: 600; }
.tl-tech { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

/* ---------- About page extras ---------- */
.about-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: start; }
.about-photo-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(160deg, var(--surface), var(--surface-2));
  padding: 28px;
  position: sticky;
  top: calc(var(--nav-h) + 24px);
}
.avatar-ring {
  width: 96px; height: 96px;
  border-radius: 22px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: #06090f;
  margin-bottom: 20px;
}
.about-photo-card .role { color: var(--text-dim); font-size: .95rem; margin-bottom: 20px; }
.meta-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 22px; }
.meta-list div { display: flex; justify-content: space-between; font-size: 0.86rem; border-bottom: 1px dashed var(--border-soft); padding-bottom: 10px; }
.meta-list div span:first-child { color: var(--text-faint); }
.meta-list div span:last-child { font-family: var(--font-mono); color: var(--text); }
.about-copy p { color: var(--text-dim); margin-bottom: 18px; font-size: 1rem; }
.about-copy h3 { font-family: var(--font-head); font-size: 1.15rem; margin: 30px 0 14px; }

/* ---------- Projects ---------- */
.project-card { display: flex; flex-direction: column; height: 100%; }
.project-card .top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 16px; }
.project-card .status {
  font-family: var(--font-mono); font-size: 0.7rem; padding: 4px 10px; border-radius: 999px;
  border: 1px solid rgba(74,222,128,.35); color: var(--success); background: rgba(74,222,128,.08);
  text-transform: uppercase; letter-spacing: .04em;
}
.project-card .status.dim { border-color: var(--border); color: var(--text-faint); background: transparent; }
.project-card h3 { font-family: var(--font-head); font-size: 1.25rem; margin-bottom: 10px; }
.project-card p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 18px; }
.project-card .pills { margin-bottom: 22px; }
.project-card .links { margin-top: auto; display: flex; gap: 12px; }
.project-card .links a { font-size: 0.86rem; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; color: var(--accent-2); }
.project-card .links a:hover { color: var(--accent); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.contact-card { text-align: center; padding: 38px 24px; }
.contact-card .icon-badge { margin: 0 auto 18px; }
.contact-card h3 { margin-bottom: 6px; }
.contact-card p { margin-bottom: 20px; }
.availability-banner {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--gradient-soft);
  padding: 40px;
  text-align: center;
  margin-top: 60px;
}
.availability-banner h3 { font-family: var(--font-head); font-size: 1.4rem; margin-bottom: 12px; }
.availability-banner p { color: var(--text-dim); margin-bottom: 24px; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border-soft);
  padding: 40px 0 max(40px, calc(env(safe-area-inset-bottom, 0px) + 24px));
  margin-top: 40px;
}
footer .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
footer .foot-links { display: flex; gap: 22px; flex-wrap: wrap; }
footer .foot-links a { color: var(--text-dim); font-size: 0.88rem; transition: color .2s ease; }
footer .foot-links a:hover { color: var(--accent); }
footer .copy { color: var(--text-faint); font-size: 0.82rem; font-family: var(--font-mono); }

/* ---------- Page hero (non-home pages) ---------- */
.page-hero { padding: calc(var(--nav-h) + 70px) 0 60px; }
.page-hero h1 { font-family: var(--font-head); font-size: clamp(2.1rem, 4vw, 2.9rem); letter-spacing: -.02em; margin-bottom: 16px; }
.page-hero p { color: var(--text-dim); max-width: 60ch; font-size: 1.05rem; }
.breadcrumb { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-faint); margin-bottom: 18px; }
.breadcrumb a { color: var(--accent); }

/* ---------- 404 ---------- */
.error-page {
  min-height: 100vh;
  min-height: 100dvh;
  padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
  display: flex; align-items: center; justify-content: center; text-align: center;
}
.error-page .code {
  font-family: var(--font-head); font-size: clamp(5rem, 16vw, 9rem); font-weight: 700; line-height: 1;
  background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo-card { position: static; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: calc(var(--nav-h) + env(safe-area-inset-top, 0px));
    left: 0; right: 0; bottom: 0;
    height: calc(100vh - var(--nav-h) - env(safe-area-inset-top, 0px));
    height: calc(100dvh - var(--nav-h) - env(safe-area-inset-top, 0px));
    flex-direction: column; align-items: stretch; justify-content: flex-start;
    padding: 28px max(24px, env(safe-area-inset-right, 0px)) max(28px, env(safe-area-inset-bottom, 0px)) max(24px, env(safe-area-inset-left, 0px));
    background: rgba(5,7,13,.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(100%); transition: transform .3s ease; gap: 6px;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { padding: 16px; font-size: 1.05rem; text-align: left; min-height: 44px; display: flex; align-items: center; }
  .nav-toggle { display: flex; padding: 11px; }
  .lang-toggle button { padding: 9px 13px; min-width: 38px; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  section { padding: 64px 0; }
  footer .container { flex-direction: column; text-align: center; }
}

/* ---------- Reduced motion (OS-level accessibility setting, iOS/Android/desktop) ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .eyebrow .pulse { animation: none; }
  .terminal-body .cursor { animation: none; opacity: 1; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}