/* ============================================================
   r3tro_n3o — portfolio design system
   Palette: ink + amber (offense) / teal (defense) / violet (systems)
   ============================================================ */

:root {
  color-scheme: dark;

  --bg: #07080a;
  --bg-soft: #0b0d11;
  --ink: #ece9e2;
  --ink-dim: #a3a8b2;
  --ink-faint: #6d727c;

  /* accents: bright = fills/gradients/dots, -ink = text & hairlines */
  --amber: #ffb454;
  --amber-hot: #ff8f3c;
  --teal: #5ad6c8;
  --violet: #9d8cff;
  --sky: #7cc4ff;
  --rose: #ff6b81;
  --amber-ink: var(--amber);
  --teal-ink: var(--teal);
  --violet-ink: var(--violet);
  --sky-ink: var(--sky);
  --rose-ink: var(--rose);

  --stroke: rgba(255, 255, 255, 0.09);
  --stroke-strong: rgba(255, 255, 255, 0.18);
  --stroke-soft: rgba(255, 255, 255, 0.05);
  --surface-1: rgba(255, 255, 255, 0.03);
  --glass-bg: linear-gradient(150deg, rgba(255, 255, 255, 0.065), rgba(255, 255, 255, 0.018));
  --glass-blur: blur(20px) saturate(140%);

  --nav-bg: rgba(10, 11, 14, 0.55);
  --nav-bg-scrolled: rgba(10, 11, 14, 0.82);
  --term-bg: rgba(8, 9, 12, 0.6);
  --code-bg: rgba(0, 0, 0, 0.44);
  --modal-bg: linear-gradient(160deg, rgba(20, 22, 27, 0.96), rgba(12, 13, 17, 0.96));
  --overlay-bg: rgba(5, 6, 8, 0.82);
  --menu-bg: rgba(7, 8, 10, 0.9);
  --input-bg: rgba(0, 0, 0, 0.28);
  --input-bg-focus: rgba(0, 0, 0, 0.4);
  --tint-bg: rgba(255, 255, 255, 0.018);
  --footer-bg: rgba(255, 255, 255, 0.015);
  --hover-bg: rgba(255, 255, 255, 0.03);
  --track-bg: rgba(255, 255, 255, 0.06);
  --line-faint: rgba(255, 255, 255, 0.07);
  --ring-color: rgba(255, 180, 84, 0.35);
  --ring-hot: rgba(255, 180, 84, 0.75);
  --thumb: #2a2c33;

  --radius: 14px;
  --radius-sm: 8px;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --sans: 'Syne', system-ui, sans-serif;
  --serif: 'Instrument Serif', Georgia, serif;

  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --glow-amber: 0 0 0 1px rgba(255, 180, 84, 0.25), 0 12px 40px rgba(255, 143, 60, 0.12);
}

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

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

body {
  background: var(--bg);
  color: var(--ink-dim);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

@media (hover: hover) and (pointer: fine) {
  body, a, button, input, textarea, [data-hover] { cursor: none; }
}

img, svg { max-width: 100%; }
a { color: inherit; }
::selection { background: rgba(255, 180, 84, 0.28); color: #fff; }

::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--thumb); border-radius: 99px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--amber); }

/* ── background layers ─────────────────────────────────── */

#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

.aurora { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.aurora .blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.5;
}
.aurora .b1 { width: 46vw; height: 46vw; top: -12vw; left: -10vw; background: radial-gradient(circle, rgba(255, 143, 60, 0.16), transparent 65%); }
.aurora .b2 { width: 42vw; height: 42vw; top: 30vh; right: -14vw; background: radial-gradient(circle, rgba(90, 214, 200, 0.12), transparent 65%); }
.aurora .b3 { width: 38vw; height: 38vw; bottom: -12vw; left: 25vw; background: radial-gradient(circle, rgba(157, 140, 255, 0.1), transparent 65%); }

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.5;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
}

main, .site-footer, .nav-shell { position: relative; z-index: 3; }

/* ── custom cursor ─────────────────────────────────────── */

#cursor, #cursor-ring { display: none; }
@media (hover: hover) and (pointer: fine) {
  #cursor, #cursor-ring { display: block; position: fixed; pointer-events: none; z-index: 9999; transform: translate(-50%, -50%); border-radius: 50%; }
  #cursor { width: 9px; height: 9px; background: var(--amber-ink); box-shadow: 0 0 12px rgba(255, 180, 84, 0.7); transition: width 0.2s, height 0.2s; }
  #cursor-ring { width: 34px; height: 34px; border: 1px solid var(--ring-color); transition: transform 0.15s ease-out, width 0.2s, height 0.2s, border-color 0.2s; }
  body.cursor-hot #cursor { width: 5px; height: 5px; }
  body.cursor-hot #cursor-ring { width: 50px; height: 50px; border-color: var(--ring-hot); }
}

/* ── layout helpers ────────────────────────────────────── */

.wrap { width: min(1240px, calc(100% - 3rem)); margin-inline: auto; }
.wrap-narrow { width: min(880px, calc(100% - 3rem)); margin-inline: auto; }

.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

section { padding: clamp(4.5rem, 9vw, 7rem) 0; position: relative; }
section.tinted { background: var(--tint-bg); }

.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--stroke-strong), transparent); width: min(1240px, calc(100% - 3rem)); margin: 0 auto; }

/* ── typography ────────────────────────────────────────── */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--amber-ink);
}
.eyebrow .eyebrow-num { color: var(--ink-faint); }
.eyebrow::before { content: ''; width: 26px; height: 1px; background: var(--amber-ink); opacity: 0.6; }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}
.section-title {
  font-family: var(--sans);
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--ink);
  margin-top: 0.8rem;
}
.section-title em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--amber-ink);
  letter-spacing: 0;
}
.sh-note { font-size: 0.95rem; color: var(--ink-faint); max-width: 44ch; justify-self: end; }
.sh-note strong { color: var(--ink-dim); font-weight: 600; }

.lede-serif {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.5;
  color: var(--ink);
}

/* ── buttons ───────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.85rem 1.7rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s, border-color 0.25s, color 0.25s;
}
.btn-sm { padding: 0.6rem 1.2rem; font-size: 0.68rem; }

.btn-primary {
  background: linear-gradient(135deg, var(--amber), var(--amber-hot));
  color: #14100a;
  box-shadow: 0 10px 30px rgba(255, 143, 60, 0.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(255, 143, 60, 0.35); }

.btn-ghost {
  color: var(--ink);
  border-color: var(--stroke-strong);
  background: var(--surface-1);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { border-color: var(--amber-ink); color: var(--amber-ink); transform: translateY(-2px); }

.btn-teal { background: linear-gradient(135deg, var(--teal), #3cb9ad); color: #06231f; }
.btn-teal:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(90, 214, 200, 0.25); }

/* ── nav ───────────────────────────────────────────────── */

.nav-shell {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.1rem 1.5rem 0;
  transition: padding 0.35s ease;
}
.nav-shell.scrolled { padding-top: 0.6rem; }

.nav-bar {
  width: min(1240px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.6rem;
  padding: 0.65rem 0.9rem 0.65rem 1.4rem;
  border-radius: 999px;
  background: var(--nav-bg);
  transition: background 0.35s, box-shadow 0.35s;
}
.nav-shell.scrolled .nav-bar {
  background: var(--nav-bg-scrolled);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.brand {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand .caret { color: var(--amber-ink); animation: blink 1.1s step-end infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.nav-links { display: flex; align-items: center; gap: 0.3rem; list-style: none; margin-left: auto; }
.nav-links a {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  text-decoration: none;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: var(--ink); background: rgba(255, 255, 255, 0.05); }
.nav-links a.active { color: #14100a; background: var(--amber); font-weight: 700; }

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

.hamburger {
  display: none;
  background: none;
  border: 1px solid var(--stroke);
  border-radius: 10px;
  color: var(--ink-dim);
  padding: 0.45rem;
  margin-left: auto;
  line-height: 0;
}
.hamburger:hover { color: var(--amber-ink); border-color: var(--amber-ink); }

/* theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface-1);
  border: 1px solid var(--stroke);
  color: var(--amber-ink);
  font-size: 1rem;
  line-height: 1;
  transition: border-color 0.25s, color 0.25s, transform 0.25s, background 0.25s;
}
.theme-toggle:hover { border-color: var(--amber-ink); transform: translateY(-1px); }
.theme-toggle i { line-height: 1; }
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="light"] .theme-icon-sun { display: none; }
#mobile-menu .theme-toggle { margin-top: 0.4rem; }

#mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.4rem;
  background: var(--menu-bg);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
}
#mobile-menu.open { display: flex; }
#mobile-menu a.mm-link {
  font-family: var(--sans);
  font-size: clamp(1.6rem, 7vw, 2.2rem);
  font-weight: 700;
  color: var(--ink-dim);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: color 0.2s, transform 0.2s;
}
#mobile-menu a.mm-link:hover, #mobile-menu a.mm-link.active { color: var(--amber-ink); transform: translateX(6px); }
#mobile-menu .mm-meta { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint); margin-top: 1.5rem; }
#close-menu {
  position: absolute;
  top: 1.4rem; right: 1.6rem;
  background: none;
  border: 1px solid var(--stroke);
  border-radius: 50%;
  width: 42px; height: 42px;
  color: var(--ink-dim);
  font-size: 1rem;
}
#close-menu:hover { color: var(--amber-ink); border-color: var(--amber-ink); }

/* ── page header (interior pages) ──────────────────────── */

.page-head { padding: clamp(9rem, 16vw, 12rem) 0 clamp(3rem, 6vw, 4.5rem); position: relative; overflow: hidden; }
.page-head::after {
  content: '';
  position: absolute;
  top: -30%; right: -10%;
  width: 55vw; height: 55vw;
  background: radial-gradient(circle, rgba(255, 143, 60, 0.1), transparent 62%);
  filter: blur(70px);
  pointer-events: none;
}
.crumbs { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 1.4rem; }
.crumbs a { color: var(--ink-faint); text-decoration: none; }
.crumbs a:hover { color: var(--amber-ink); }
.crumbs .sep { margin: 0 0.5rem; opacity: 0.5; }

.page-head-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 2.5rem; align-items: end; }
.page-title {
  font-family: var(--sans);
  font-size: clamp(2.6rem, 7vw, 5rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 0.95;
  color: var(--ink);
}
.page-title em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--amber-ink); letter-spacing: 0; }
.page-lede { font-size: 1.02rem; color: var(--ink-faint); max-width: 46ch; padding-bottom: 0.5rem; }
.page-lede strong { color: var(--ink-dim); font-weight: 600; }

/* ── hero (home) ───────────────────────────────────────── */

.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: clamp(8rem, 14vw, 10rem) 0 clamp(3rem, 6vw, 5rem);
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber-ink);
  margin-bottom: 1.6rem;
}
.hero-tag-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 10px var(--amber); animation: pulse-dot 2.4s ease-in-out infinite; }
@keyframes pulse-dot { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.35; transform: scale(0.75); } }

.hero-name {
  font-family: var(--sans);
  font-size: clamp(3rem, 8.5vw, 6.4rem);
  font-weight: 800;
  line-height: 0.88;
  letter-spacing: -0.04em;
  color: var(--ink);
}
.hero-alias {
  display: block;
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--teal-ink);
}
.hero-sub { font-size: clamp(1rem, 1.6vw, 1.15rem); color: var(--ink-dim); max-width: 52ch; line-height: 1.75; margin-top: 1.6rem; }
.hero-sub strong { color: var(--ink); font-weight: 600; }

.role-rotator {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1.5rem;
  font-family: var(--mono);
  font-size: clamp(0.75rem, 1.3vw, 0.9rem);
}
.role-prefix { color: var(--ink-faint); white-space: nowrap; }
.role-text-wrapper { position: relative; height: 1.5em; overflow: hidden; min-width: 250px; }
.role-item {
  position: absolute;
  top: 0; left: 0;
  color: var(--teal-ink);
  white-space: nowrap;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.role-item.active { opacity: 1; transform: translateY(0); }
.role-item.exit { opacity: 0; transform: translateY(-100%); }
.role-cursor { display: inline-block; width: 2px; height: 1.05em; background: var(--teal-ink); animation: blink 0.85s step-end infinite; }

.hero-actions { display: flex; gap: 1rem; margin-top: 2.4rem; flex-wrap: wrap; }

.hero-meta {
  display: flex;
  gap: 1.6rem;
  flex-wrap: wrap;
  margin-top: 2.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--stroke);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.hero-meta b { color: var(--amber-ink); font-weight: 500; }

.scroll-hint {
  position: absolute;
  bottom: 2rem; left: 50%;
  transform: translateX(-50%);
  animation: bounce 2.2s ease-in-out infinite;
  color: var(--amber-ink);
  opacity: 0.65;
}
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(7px); } }

/* ── terminal ──────────────────────────────────────────── */

.terminal {
  background: var(--term-bg);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem 1.4rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-dim);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  position: relative;
  overflow: hidden;
}
.terminal::after {
  content: '';
  position: absolute;
  top: 0; left: 8%; right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 180, 84, 0.6), transparent);
}
.terminal-bar { display: flex; align-items: center; gap: 6px; margin-bottom: 1rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--stroke); }
.terminal-dot { width: 10px; height: 10px; border-radius: 50%; }
.terminal-title { margin-left: 0.6rem; font-size: 0.64rem; letter-spacing: 0.1em; color: var(--ink-faint); }
.terminal-line { line-height: 1.85; }
.terminal-line .prompt { color: var(--amber-ink); }
.terminal-line .cmd { color: var(--ink); }
.terminal-line .output { color: var(--ink-faint); }
.terminal-line .success { color: var(--teal-ink); }
#typed-text { color: var(--amber-ink); }
.terminal-cursor-blink { display: inline-block; width: 8px; height: 14px; background: var(--amber-ink); vertical-align: -2px; animation: blink 0.85s step-end infinite; }
.terminal-stack { display: grid; gap: 1.3rem; }

/* ── ticker ────────────────────────────────────────────── */

.ticker {
  border-top: 1px solid var(--stroke);
  border-bottom: 1px solid var(--stroke);
  background: var(--footer-bg);
  overflow: hidden;
  padding: 0.85rem 0;
  position: relative;
  z-index: 3;
}
.ticker-track { display: flex; gap: 3rem; width: max-content; animation: marquee 42s linear infinite; }
.ticker:hover .ticker-track { animation-play-state: paused; }
.ticker span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}
.ticker span i { color: var(--amber-ink); font-style: normal; margin-right: 0.6rem; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ── live ops panel ────────────────────────────────────── */

.ops-panel {
  border-radius: var(--radius);
  padding: clamp(1.4rem, 3vw, 2.2rem);
  margin-top: 2rem;
}
.ops-header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--stroke);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber-ink);
}
.ops-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 8px var(--teal); animation: pulse-dot 2s ease-in-out infinite; }
.ops-clock { margin-left: auto; color: var(--ink-faint); letter-spacing: 0.08em; }
.ops-grid { display: grid; gap: 0.4rem; }
.ops-line {
  display: flex;
  gap: 1rem;
  align-items: baseline;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.9;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  transition: background 0.2s;
}
.ops-line:hover { background: var(--hover-bg); }
.ops-key { color: var(--ink-faint); min-width: 108px; letter-spacing: 0.08em; }
.ops-val { color: var(--ink); }
.ops-badge {
  font-size: 0.58rem;
  padding: 0.14rem 0.55rem;
  border-radius: 999px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  margin-left: auto;
}
.badge-active { background: rgba(90, 214, 200, 0.12); color: var(--teal-ink); border: 1px solid rgba(90, 214, 200, 0.3); }
.badge-progress { background: rgba(255, 180, 84, 0.1); color: var(--amber-ink); border: 1px solid rgba(255, 180, 84, 0.3); }
.badge-planned { background: rgba(255, 107, 129, 0.1); color: var(--rose-ink); border: 1px solid rgba(255, 107, 129, 0.3); }

/* ── case study cards ──────────────────────────────────── */

.filter-bar { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 2.5rem; }
.filter-btn {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  background: var(--surface-1);
  border: 1px solid var(--stroke);
  border-radius: 999px;
  padding: 0.55rem 1.15rem;
  transition: all 0.25s;
}
.filter-btn:hover { color: var(--ink); border-color: var(--stroke-strong); }
.filter-btn.active { color: #14100a; background: var(--amber); border-color: var(--amber-ink); }

.cat-block { margin-bottom: clamp(3rem, 6vw, 4.5rem); }
.cat-block[hidden] { display: none; }
.cat-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 1.4rem; padding-bottom: 0.9rem; border-bottom: 1px solid var(--stroke); flex-wrap: wrap; }
.cat-index { font-family: var(--mono); font-size: 0.7rem; color: var(--amber-ink); letter-spacing: 0.16em; }
.cat-name { font-family: var(--sans); font-size: clamp(1.3rem, 2.6vw, 1.7rem); font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }
.cat-desc { font-size: 0.88rem; color: var(--ink-faint); margin-left: auto; max-width: 46ch; }

.work-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 1.4rem; }

.cs-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
}
.cs-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
  opacity: 0;
  transition: opacity 0.35s;
}
.cs-card:hover { transform: translateY(-5px); border-color: rgba(255, 180, 84, 0.35); box-shadow: var(--shadow), 0 0 30px rgba(255, 143, 60, 0.1); }
.cs-card:hover::before { opacity: 1; }
.cs-card.is-hidden { display: none; }

.cs-card-header { padding: 1.5rem 1.5rem 1rem; flex: 1; }
.cs-meta { display: flex; justify-content: space-between; align-items: center; gap: 0.8rem; margin-bottom: 0.9rem; }
.cs-lang { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.1em; color: var(--ink-faint); }
.cs-title { font-family: var(--sans); font-size: 1.08rem; font-weight: 700; color: var(--ink); margin-bottom: 0.55rem; letter-spacing: -0.01em; }
.cs-desc { font-size: 0.85rem; color: var(--ink-faint); line-height: 1.65; margin-bottom: 1rem; }
.cs-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.tech-tag {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  padding: 0.22rem 0.55rem;
  background: rgba(124, 196, 255, 0.07);
  border: 1px solid rgba(124, 196, 255, 0.16);
  border-radius: 4px;
  color: var(--sky-ink);
}
.cs-links { display: flex; gap: 0.6rem; padding: 1rem 1.5rem 1.4rem; flex-wrap: wrap; align-items: center; border-top: 1px solid var(--stroke-soft); }

.project-link, .cs-expand-btn {
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  text-decoration: none;
  transition: all 0.25s;
}
.link-github { color: var(--ink-dim); border: 1px solid var(--stroke); background: var(--surface-1); }
.link-github:hover { color: var(--ink); border-color: var(--stroke-strong); transform: translateY(-2px); }
.link-demo { color: var(--teal-ink); border: 1px solid rgba(90, 214, 200, 0.3); }
.link-demo:hover { background: rgba(90, 214, 200, 0.1); transform: translateY(-2px); }

.cs-expand-btn {
  margin-left: auto;
  color: var(--amber-ink);
  background: rgba(255, 180, 84, 0.07);
  border: 1px solid rgba(255, 180, 84, 0.28);
}
.cs-expand-btn:hover { background: rgba(255, 180, 84, 0.14); }
.expand-arrow { display: inline-block; transition: transform 0.3s; }
.cs-expand-btn.open .expand-arrow { transform: rotate(180deg); }

/* proof content: collapsed in-card, rendered open inside the modal */
.cs-proof { max-height: 0; overflow: hidden; transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1); }
.cs-proof-inner { padding: 1.6rem 1.6rem 1.8rem; }
.proof-section { margin-bottom: 1.4rem; }
.proof-section:last-child { margin-bottom: 0; }
.proof-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teal-ink);
  margin-bottom: 0.6rem;
}
.proof-label::after { content: ''; flex: 1; height: 1px; background: rgba(90, 214, 200, 0.14); }
.proof-text { font-size: 0.86rem; color: var(--ink-dim); line-height: 1.75; }
.proof-text strong { color: var(--ink); }
.proof-terminal {
  background: var(--code-bg);
  border: 1px solid rgba(255, 180, 84, 0.14);
  border-radius: var(--radius-sm);
  padding: 1rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  line-height: 1.95;
  color: var(--ink-dim);
  overflow-x: auto;
}
.t-green { color: var(--teal-ink); }
.t-cyan { color: var(--sky-ink); }
.t-red { color: var(--rose-ink); }
.t-white { color: var(--ink); }
.t-dim { color: var(--ink-faint); }
.impact-wrap { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.impact-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(255, 180, 84, 0.08);
  border: 1px solid rgba(255, 180, 84, 0.22);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--amber-ink);
}

/* ── case study modal ──────────────────────────────────── */

.cs-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: var(--overlay-bg);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  overflow-y: auto;
  padding: 2rem 1rem;
}
.cs-modal-overlay.open { display: flex; align-items: flex-start; justify-content: center; }
.cs-modal-box {
  background: var(--modal-bg);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  border: 1px solid var(--stroke-strong);
  border-radius: 18px;
  width: 100%;
  max-width: 780px;
  position: relative;
  margin: auto;
  box-shadow: var(--shadow), 0 0 60px rgba(255, 143, 60, 0.1);
}
.cs-modal-close { display: flex; justify-content: flex-end; padding: 0.8rem 1rem 0; }
.cs-modal-close button {
  background: var(--surface-1);
  border: 1px solid var(--stroke);
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  transition: all 0.2s;
}
.cs-modal-close button:hover { color: var(--amber-ink); border-color: var(--amber-ink); }
.cs-modal-card-top { padding: 0.6rem 1.6rem 1.3rem; border-bottom: 1px solid var(--stroke); }
.cs-modal-title { font-family: var(--sans); font-size: clamp(1.2rem, 3vw, 1.5rem); font-weight: 700; color: var(--ink); margin: 0.6rem 0 0.5rem; }
.cs-modal-desc { font-size: 0.88rem; color: var(--ink-faint); line-height: 1.7; margin-bottom: 0.9rem; }

/* ── capability modules ────────────────────────────────── */

.cap-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.2rem; align-items: start; }
.cap-module {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.cap-module:hover { border-color: var(--stroke-strong); }
.cap-module.cap-active { border-color: var(--amber-ink); box-shadow: 0 0 32px rgba(255, 143, 60, 0.1); }
.cap-module.cap-teal.cap-active { border-color: var(--teal-ink); box-shadow: 0 0 32px rgba(90, 214, 200, 0.1); }
.cap-module.cap-rose.cap-active { border-color: var(--rose-ink); box-shadow: 0 0 32px rgba(255, 107, 129, 0.1); }
.cap-module.cap-violet.cap-active { border-color: var(--violet-ink); box-shadow: 0 0 32px rgba(157, 140, 255, 0.1); }

.cap-header { padding: 1.2rem 1.4rem; display: flex; justify-content: space-between; align-items: center; user-select: none; }
.cap-left { display: flex; align-items: center; gap: 0.9rem; }
.cap-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.05rem;
  background: rgba(255, 180, 84, 0.08);
  border: 1px solid rgba(255, 180, 84, 0.18);
  border-radius: 11px;
  flex-shrink: 0;
}
.cap-teal .cap-icon { background: rgba(90, 214, 200, 0.08); border-color: rgba(90, 214, 200, 0.18); }
.cap-rose .cap-icon { background: rgba(255, 107, 129, 0.08); border-color: rgba(255, 107, 129, 0.18); }
.cap-violet .cap-icon { background: rgba(157, 140, 255, 0.08); border-color: rgba(157, 140, 255, 0.18); }
.cap-name { font-family: var(--sans); font-size: 0.95rem; font-weight: 700; color: var(--ink); }
.cap-level { font-family: var(--mono); font-size: 0.56rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--amber-ink); margin-top: 0.15rem; }
.cap-teal .cap-level { color: var(--teal-ink); }
.cap-rose .cap-level { color: var(--rose-ink); }
.cap-violet .cap-level { color: var(--violet-ink); }
.cap-chevron { font-size: 0.7rem; color: var(--ink-faint); transition: transform 0.3s, color 0.2s; }
.cap-active .cap-chevron { transform: rotate(180deg); color: var(--amber-ink); }
.cap-teal.cap-active .cap-chevron { color: var(--teal-ink); }
.cap-rose.cap-active .cap-chevron { color: var(--rose-ink); }
.cap-violet.cap-active .cap-chevron { color: var(--violet-ink); }

.cap-body { max-height: 0; overflow: hidden; transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1); border-top: 1px solid transparent; }
.cap-body.cap-open { max-height: 1400px; border-top-color: var(--stroke-soft); }
.cap-inner { padding: 1.3rem 1.4rem 1.5rem; }
.cap-section { margin-bottom: 1.3rem; }
.cap-section:last-child { margin-bottom: 0; }
.cap-section-title {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.56rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.6rem;
}
.cap-section-title::after { content: ''; flex: 1; height: 1px; background: rgba(255, 255, 255, 0.06); }
.cap-list { list-style: none; }
.cap-list li { font-size: 0.8rem; color: var(--ink-dim); padding: 0.2rem 0; display: flex; gap: 0.55rem; line-height: 1.55; }
.cap-list li::before { content: '→'; color: var(--amber-ink); flex-shrink: 0; }
.cap-teal .cap-list li::before { color: var(--teal-ink); }
.cap-rose .cap-list li::before { color: var(--rose-ink); }
.cap-violet .cap-list li::before { color: var(--violet-ink); }
.cap-tools-wrap { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.cap-tool {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 180, 84, 0.07);
  border: 1px solid rgba(255, 180, 84, 0.18);
  color: var(--amber-ink);
}
.cap-teal .cap-tool { background: rgba(90, 214, 200, 0.07); border-color: rgba(90, 214, 200, 0.18); color: var(--teal-ink); }
.cap-rose .cap-tool { background: rgba(255, 107, 129, 0.07); border-color: rgba(255, 107, 129, 0.18); color: var(--rose-ink); }
.cap-violet .cap-tool { background: rgba(157, 140, 255, 0.07); border-color: rgba(157, 140, 255, 0.18); color: var(--violet-ink); }
.cap-terminal {
  background: var(--code-bg);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.95rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  line-height: 1.85;
  color: var(--ink-dim);
  overflow-x: auto;
}
.cap-thinking {
  font-size: 0.8rem;
  color: var(--ink-dim);
  line-height: 1.75;
  border-left: 2px solid var(--amber);
  padding: 0.5rem 0 0.5rem 0.9rem;
  background: rgba(255, 180, 84, 0.03);
  border-radius: 0 6px 6px 0;
}
.cap-teal .cap-thinking { border-left-color: var(--teal-ink); background: rgba(90, 214, 200, 0.03); }
.cap-rose .cap-thinking { border-left-color: var(--rose-ink); background: rgba(255, 107, 129, 0.03); }
.cap-violet .cap-thinking { border-left-color: var(--violet-ink); background: rgba(157, 140, 255, 0.03); }

/* ── skill bars ────────────────────────────────────────── */

.skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 1.2rem; }
.skill-category {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 1.6rem;
}
.skill-cat-title {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal-ink);
  margin-bottom: 1.4rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--stroke);
}
.skill-cat-title .idx { color: var(--ink-faint); }
.skill-item { margin-bottom: 1.15rem; }
.skill-item:last-child { margin-bottom: 0; }
.skill-header { display: flex; justify-content: space-between; margin-bottom: 0.45rem; font-family: var(--mono); font-size: 0.72rem; }
.skill-name { color: var(--ink); }
.skill-pct { color: var(--ink-faint); }
.skill-bar-track { height: 4px; background: var(--track-bg); border-radius: 99px; overflow: hidden; }
.skill-bar-fill { height: 100%; border-radius: 99px; width: 0; transition: width 1.2s cubic-bezier(0.4, 0, 0.2, 1); }
.fill-amber { background: linear-gradient(90deg, var(--amber), rgba(255, 180, 84, 0.35)); }
.fill-teal { background: linear-gradient(90deg, var(--teal), rgba(90, 214, 200, 0.35)); }
.fill-violet { background: linear-gradient(90deg, var(--violet), rgba(157, 140, 255, 0.35)); }
.fill-sky { background: linear-gradient(90deg, var(--sky), rgba(124, 196, 255, 0.35)); }

/* ── about / prose ─────────────────────────────────────── */

.about-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: clamp(2rem, 4vw, 3.5rem); align-items: start; }
.prose { font-size: 1rem; line-height: 1.85; color: var(--ink-dim); }
.prose p { margin-bottom: 1.3rem; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose .intro {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  line-height: 1.55;
  color: var(--ink);
  border-left: 2px solid var(--amber);
  padding-left: 1.1rem;
  margin-bottom: 1.8rem;
}

.stat-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.stat-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 1.4rem 1.2rem;
  text-align: center;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.stat-card:hover { transform: translateY(-4px); border-color: rgba(255, 180, 84, 0.35); box-shadow: var(--glow-amber); }
.stat-num { font-family: var(--sans); font-size: clamp(1.8rem, 4vw, 2.3rem); font-weight: 800; color: var(--amber-ink); line-height: 1; }
.stat-label { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); margin-top: 0.5rem; }

.tool-groups { display: grid; gap: 1.6rem; }
.tool-group-title {
  display: flex; align-items: center; gap: 0.7rem;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.7rem;
}
.tool-group-title::after { content: ''; flex: 1; height: 1px; background: var(--stroke); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--surface-1);
  color: var(--ink-dim);
  transition: all 0.25s;
}
.skill-tag:hover { transform: translateY(-2px); }
.tag-code { border-color: rgba(124, 196, 255, 0.2); color: var(--sky-ink); background: rgba(124, 196, 255, 0.05); }
.tag-code:hover { border-color: var(--sky-ink); box-shadow: 0 6px 20px rgba(124, 196, 255, 0.12); }
.tag-offense { border-color: rgba(255, 180, 84, 0.22); color: var(--amber-ink); background: rgba(255, 180, 84, 0.05); }
.tag-offense:hover { border-color: var(--amber-ink); box-shadow: 0 6px 20px rgba(255, 180, 84, 0.12); }
.tag-defense { border-color: rgba(90, 214, 200, 0.22); color: var(--teal-ink); background: rgba(90, 214, 200, 0.05); }
.tag-defense:hover { border-color: var(--teal-ink); box-shadow: 0 6px 20px rgba(90, 214, 200, 0.12); }
.tag-cloud { border-color: rgba(157, 140, 255, 0.22); color: var(--violet-ink); background: rgba(157, 140, 255, 0.05); }
.tag-cloud:hover { border-color: var(--violet-ink); box-shadow: 0 6px 20px rgba(157, 140, 255, 0.12); }

/* principles */
.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.2rem; }
.principle {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 1.6rem;
  transition: transform 0.3s, border-color 0.3s;
}
.principle:hover { transform: translateY(-4px); border-color: var(--stroke-strong); }
.principle .p-num { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.2em; color: var(--amber-ink); }
.principle h3 { font-family: var(--sans); font-size: 1.05rem; font-weight: 700; color: var(--ink); margin: 0.7rem 0 0.5rem; }
.principle p { font-size: 0.85rem; color: var(--ink-faint); line-height: 1.7; }

/* ── timeline ──────────────────────────────────────────── */

.timeline-container { max-width: 780px; margin: 0 auto; position: relative; }
.timeline-line {
  position: absolute;
  left: 108px; top: 6px; bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(255, 180, 84, 0.5), rgba(90, 214, 200, 0.4), transparent);
}
.timeline-item {
  display: grid;
  grid-template-columns: 88px auto;
  gap: 2.2rem;
  margin-bottom: 2rem;
  position: relative;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.timeline-item.visible { opacity: 1; transform: translateY(0); }
.timeline-year { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-faint); text-align: right; padding-top: 1.1rem; letter-spacing: 0.06em; }
.timeline-content {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
  position: relative;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.timeline-content::before {
  content: '';
  position: absolute;
  left: -26px; top: 18px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--amber);
  box-shadow: 0 0 10px rgba(255, 180, 84, 0.6);
}
.timeline-content:hover { border-color: rgba(255, 180, 84, 0.3); transform: translateX(4px); }
.timeline-event { font-family: var(--sans); font-size: 1rem; font-weight: 700; color: var(--ink); margin-bottom: 0.4rem; }
.timeline-detail { font-family: var(--mono); font-size: 0.7rem; color: var(--ink-faint); line-height: 1.75; }
.timeline-current .timeline-content { border-color: rgba(90, 214, 200, 0.3); }
.timeline-current .timeline-content::before { border-color: var(--teal-ink); box-shadow: 0 0 10px rgba(90, 214, 200, 0.6); }

.cert-badges { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--stroke-soft); }
.cert-badge {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: rgba(124, 196, 255, 0.05);
  border: 1px solid rgba(124, 196, 255, 0.16);
  border-radius: 10px;
  padding: 0.55rem 0.85rem;
  text-decoration: none;
  transition: all 0.25s;
  flex: 1;
  min-width: 190px;
}
.cert-badge:hover { background: rgba(124, 196, 255, 0.1); border-color: rgba(124, 196, 255, 0.4); transform: translateY(-2px); }
.cert-badge-gold { background: rgba(255, 180, 84, 0.05); border-color: rgba(255, 180, 84, 0.2); }
.cert-badge-gold:hover { background: rgba(255, 180, 84, 0.1); border-color: rgba(255, 180, 84, 0.45); }
.cert-icon { display: flex; align-items: center; font-size: 1rem; color: var(--sky-ink); flex-shrink: 0; }
.cert-badge-gold .cert-icon { color: var(--amber-ink); }
.cert-info { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.cert-name { font-family: var(--mono); font-size: 0.68rem; font-weight: 700; color: var(--ink); }
.cert-issuer { font-family: var(--mono); font-size: 0.58rem; color: var(--ink-faint); margin-top: 0.1rem; letter-spacing: 0.06em; }
.cert-arrow { font-size: 0.7rem; color: var(--ink-faint); transition: color 0.2s, transform 0.2s; }
.cert-badge:hover .cert-arrow { color: var(--amber-ink); transform: translate(2px, -2px); }

.roadmap { display: flex; flex-wrap: wrap; align-items: center; gap: 0.7rem; justify-content: center; }
.roadmap-step {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--surface-1);
  color: var(--ink-dim);
}
.roadmap-step.done { border-color: rgba(90, 214, 200, 0.35); color: var(--teal-ink); }
.roadmap-step.now { border-color: rgba(255, 180, 84, 0.5); color: var(--amber-ink); background: rgba(255, 180, 84, 0.08); box-shadow: var(--glow-amber); }
.roadmap-arrow { color: var(--ink-faint); font-family: var(--mono); }

/* ── blog ──────────────────────────────────────────────── */

.blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.4rem; }
.blog-card {
  display: flex;
  flex-direction: column;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 1.7rem;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
}
.blog-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.blog-card:hover { transform: translateY(-5px); border-color: rgba(90, 214, 200, 0.35); box-shadow: var(--shadow); }
.blog-card:hover::before { opacity: 1; }
.blog-card.featured { grid-column: 1 / -1; background: linear-gradient(140deg, rgba(90, 214, 200, 0.07), rgba(255, 255, 255, 0.02)); }
.blog-tag {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal-ink);
  background: rgba(90, 214, 200, 0.08);
  border: 1px solid rgba(90, 214, 200, 0.2);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1.1rem;
}
.blog-tag.soon { color: var(--amber-ink); background: rgba(255, 180, 84, 0.08); border-color: rgba(255, 180, 84, 0.22); }
.blog-title { font-family: var(--sans); font-size: clamp(1.05rem, 2vw, 1.3rem); font-weight: 700; color: var(--ink); line-height: 1.35; margin-bottom: 0.7rem; transition: color 0.25s; }
.blog-card:hover .blog-title { color: var(--teal-ink); }
.blog-excerpt { font-size: 0.88rem; color: var(--ink-faint); line-height: 1.7; margin-bottom: 1.4rem; flex: 1; }
.blog-meta { display: flex; justify-content: space-between; align-items: center; gap: 1rem; font-family: var(--mono); font-size: 0.62rem; color: var(--ink-faint); }
.blog-read-more { color: var(--teal-ink); font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; white-space: nowrap; }

/* ── contact ───────────────────────────────────────────── */

.contact-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: clamp(1.5rem, 3vw, 2.5rem); align-items: start; }
.contact-form { border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2rem); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1.1rem; }
.form-group label {
  display: block;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.5rem;
}
.form-group input, .form-group textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--stroke);
  border-radius: 10px;
  padding: 0.85rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  resize: vertical;
}
.form-group input:focus, .form-group textarea:focus {
  border-color: rgba(255, 180, 84, 0.5);
  box-shadow: 0 0 0 3px rgba(255, 180, 84, 0.08);
  background: var(--input-bg-focus);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: #4e525b; }
.form-status { display: none; margin-top: 0.9rem; text-align: center; font-family: var(--mono); font-size: 0.72rem; }

.status-panel { border-radius: var(--radius); padding: 1.5rem; margin-bottom: 1.2rem; }
.status-title { display: flex; align-items: center; gap: 0.6rem; font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--teal-ink); margin-bottom: 1.1rem; }
.status-row { display: flex; justify-content: space-between; gap: 1rem; font-family: var(--mono); font-size: 0.72rem; padding: 0.5rem 0; border-bottom: 1px dashed var(--line-faint); }
.status-row:last-child { border-bottom: none; }
.status-row .k { color: var(--ink-faint); letter-spacing: 0.08em; }
.status-row .v { color: var(--ink); text-align: right; }
.status-row .v.hot { color: var(--amber-ink); }

.social-links { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.65rem 1.15rem;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--surface-1);
  color: var(--ink-dim);
  text-decoration: none;
  transition: all 0.25s;
}
.social-link:hover { color: var(--amber-ink); border-color: rgba(255, 180, 84, 0.4); transform: translateY(-2px); box-shadow: var(--shadow); }

/* ── CTA band ──────────────────────────────────────────── */

.cta-band {
  border-radius: 20px;
  padding: clamp(2.2rem, 5vw, 3.5rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta-band::after {
  content: '';
  position: absolute;
  right: -80px; top: -80px;
  width: 260px; height: 260px;
  background: radial-gradient(circle, rgba(255, 143, 60, 0.16), transparent 70%);
  filter: blur(30px);
  pointer-events: none;
}
.cta-title { font-family: var(--sans); font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 800; color: var(--ink); letter-spacing: -0.02em; line-height: 1.1; }
.cta-title em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--amber-ink); }
.cta-sub { font-size: 0.95rem; color: var(--ink-faint); margin-top: 0.7rem; max-width: 52ch; }
.cta-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; }

/* ── footer ────────────────────────────────────────────── */

.site-footer { border-top: 1px solid var(--stroke); background: var(--footer-bg); padding: clamp(3rem, 6vw, 4.5rem) 0 2rem; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 1fr)) minmax(0, 1.2fr); gap: 2.5rem; }
.footer-brand p { font-size: 0.88rem; color: var(--ink-faint); line-height: 1.7; margin-top: 1rem; max-width: 34ch; }
.footer-col h4 { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--amber-ink); margin-bottom: 1.1rem; font-weight: 700; }
.footer-col a { display: block; font-size: 0.86rem; color: var(--ink-faint); text-decoration: none; padding: 0.3rem 0; transition: color 0.2s, transform 0.2s; }
.footer-col a:hover { color: var(--ink); transform: translateX(4px); }
.footer-status .status-line { display: flex; align-items: center; gap: 0.55rem; font-family: var(--mono); font-size: 0.72rem; color: var(--ink-dim); }
.footer-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 8px var(--teal); animation: pulse-dot 2s ease-in-out infinite; flex-shrink: 0; }
.footer-status .status-note { font-family: var(--mono); font-size: 0.66rem; color: var(--ink-faint); margin-top: 0.7rem; line-height: 1.8; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.8rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--stroke);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}
.footer-bottom b { color: var(--amber-ink); font-weight: 500; }

/* ── reveal ────────────────────────────────────────────── */

.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.75s ease, transform 0.75s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── responsive ────────────────────────────────────────── */

@media (max-width: 1080px) {
  .nav-cta { display: none; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cat-desc { margin-left: 0; flex-basis: 100%; }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-bar .theme-toggle { margin-left: auto; }
  .hamburger { display: block; margin-left: 0.6rem; }
  .hero-grid, .page-head-grid, .about-grid, .contact-layout, .section-head, .cta-band { grid-template-columns: 1fr; }
  .section-head { gap: 1.2rem; }
  .sh-note { justify-self: start; }
  .hero { min-height: auto; padding-top: 8rem; }
  .timeline-line { left: 6px; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.4rem; padding-left: 2rem; margin-bottom: 1.6rem; }
  .timeline-year { text-align: left; padding-top: 0; }
  .timeline-content::before { left: -2.6rem; top: 0.4rem; width: 10px; height: 10px; }
}

@media (max-width: 640px) {
  .wrap, .wrap-narrow { width: calc(100% - 2rem); }
  .form-row { grid-template-columns: 1fr; }
  .stat-cards { grid-template-columns: 1fr 1fr; }
  .ops-badge { margin-left: 0; }
  .ops-key { min-width: 92px; font-size: 0.62rem; }
  .ops-val { font-size: 0.68rem; }
  .cs-expand-btn { margin-left: 0; }
  .work-grid, .blog-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; }
  .role-text-wrapper { min-width: 170px; }
  .hero-meta { gap: 1rem; font-size: 0.6rem; }
  .roadmap { justify-content: flex-start; }
}

/* hide custom cursor on touch devices */
@media (hover: none) and (pointer: coarse) {
  #cursor, #cursor-ring { display: none !important; }
  body, a, button, input, textarea { cursor: auto !important; }
}

@media (prefers-reduced-motion: reduce) {
  .ticker-track, .scroll-hint, .hero-tag-dot, .ops-dot, .brand .caret, .terminal-cursor-blink, .role-cursor { animation: none !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   LIGHT THEME — [data-theme="light"] on <html>
   Same palette: bright accents stay as fills/gradients, *-ink
   variants carry text and hairlines so contrast holds on paper.
   ============================================================ */

[data-theme="light"] {
  color-scheme: light;

  --bg: #f4f2ec;
  --bg-soft: #ebe8e0;
  --ink: #16181d;
  --ink-dim: #454a54;
  --ink-faint: #767c87;

  --amber-ink: #a3540a;
  --teal-ink: #0c7a70;
  --violet-ink: #5940c9;
  --sky-ink: #1665b8;
  --rose-ink: #cc2743;

  --stroke: rgba(22, 24, 29, 0.11);
  --stroke-strong: rgba(22, 24, 29, 0.22);
  --stroke-soft: rgba(22, 24, 29, 0.07);
  --surface-1: rgba(255, 255, 255, 0.65);
  --glass-bg: linear-gradient(150deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.45));

  --nav-bg: rgba(255, 255, 255, 0.68);
  --nav-bg-scrolled: rgba(255, 255, 255, 0.9);
  --term-bg: rgba(255, 255, 255, 0.6);
  --code-bg: rgba(22, 24, 29, 0.04);
  --modal-bg: linear-gradient(160deg, rgba(255, 255, 255, 0.97), rgba(248, 247, 243, 0.97));
  --overlay-bg: rgba(240, 238, 232, 0.82);
  --menu-bg: rgba(246, 244, 238, 0.95);
  --input-bg: rgba(255, 255, 255, 0.75);
  --input-bg-focus: rgba(255, 255, 255, 0.95);
  --tint-bg: rgba(22, 24, 29, 0.028);
  --footer-bg: rgba(22, 24, 29, 0.03);
  --hover-bg: rgba(22, 24, 29, 0.035);
  --track-bg: rgba(22, 24, 29, 0.1);
  --line-faint: rgba(22, 24, 29, 0.11);
  --ring-color: rgba(163, 84, 10, 0.4);
  --ring-hot: rgba(163, 84, 10, 0.75);
  --thumb: #cfc9bd;

  --shadow: 0 18px 40px rgba(22, 24, 29, 0.1);
  --glow-amber: 0 0 0 1px rgba(163, 84, 10, 0.28), 0 10px 26px rgba(243, 150, 40, 0.18);
}

[data-theme="light"] ::selection { background: rgba(163, 84, 10, 0.2); color: var(--ink); }
[data-theme="light"] ::-webkit-scrollbar-thumb:hover { background: var(--amber-ink); }

/* hover/focus states that carry raw rgba from dark mode */
[data-theme="light"] .nav-links a:hover { background: rgba(22, 24, 29, 0.05); }
[data-theme="light"] .stat-card:hover { border-color: rgba(163, 84, 10, 0.4); }
[data-theme="light"] .cs-card:hover { border-color: rgba(163, 84, 10, 0.45); }
[data-theme="light"] .blog-card:hover { border-color: rgba(12, 122, 112, 0.45); }
[data-theme="light"] .timeline-content:hover,
[data-theme="light"] .timeline-current .timeline-content { border-color: rgba(163, 84, 10, 0.4); }
[data-theme="light"] .cert-badge:hover { border-color: rgba(22, 101, 184, 0.5); }
[data-theme="light"] .cert-badge-gold:hover { border-color: rgba(163, 84, 10, 0.5); }
[data-theme="light"] .form-group input:focus,
[data-theme="light"] .form-group textarea:focus { border-color: rgba(163, 84, 10, 0.55); box-shadow: 0 0 0 3px rgba(163, 84, 10, 0.1); }
[data-theme="light"] .cs-expand-btn { border-color: rgba(163, 84, 10, 0.32); background: rgba(163, 84, 10, 0.06); }
[data-theme="light"] .cs-expand-btn:hover { background: rgba(163, 84, 10, 0.12); }

/* accent hairlines read stronger on paper */
[data-theme="light"] .cs-card::before { background: linear-gradient(90deg, transparent, var(--amber-ink), transparent); }
[data-theme="light"] .blog-card::before { background: linear-gradient(90deg, transparent, var(--teal-ink), transparent); }
[data-theme="light"] .terminal::after { background: linear-gradient(90deg, transparent, rgba(163, 84, 10, 0.5), transparent); }
[data-theme="light"] .timeline-line { background: linear-gradient(180deg, transparent, rgba(163, 84, 10, 0.45), rgba(12, 122, 112, 0.4), transparent); }
[data-theme="light"] .proof-label::after { background: rgba(12, 122, 112, 0.3); }
[data-theme="light"] .proof-terminal { background: rgba(22, 24, 29, 0.035); border-color: rgba(163, 84, 10, 0.22); }
[data-theme="light"] .cap-terminal { background: rgba(22, 24, 29, 0.035); border-color: rgba(22, 24, 29, 0.1); }
[data-theme="light"] .cap-section-title::after { background: rgba(22, 24, 29, 0.1); }

/* deepen translucent tints so pills keep their edges on white */
[data-theme="light"] .impact-badge { background: rgba(163, 84, 10, 0.07); border-color: rgba(163, 84, 10, 0.28); }
[data-theme="light"] .badge-active { background: rgba(12, 122, 112, 0.1); border-color: rgba(12, 122, 112, 0.35); }
[data-theme="light"] .badge-progress { background: rgba(163, 84, 10, 0.09); border-color: rgba(163, 84, 10, 0.35); }
[data-theme="light"] .badge-planned { background: rgba(204, 39, 67, 0.08); border-color: rgba(204, 39, 67, 0.32); }