:root {
  --night: #0f1830;
  --night-2: #1b2a52;
  --dawn: #eef2f7;
  --paper: #ffffff;
  --ink: #16213a;
  --soft: #4a5670;
  --line: #cbd5e1;
  --sea: #1f7a8c;
  --amber: #f4b266;
  --amber-dark: #e89c43;
  --ok: #2f8f5b;
  --warn: #b7791f;
  --alarm: #e5482d;
  --alarm-ink: #fff4ee;
  --radius: 20px;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { font-size: 15px; scroll-behavior: smooth; scroll-padding-top: 4rem; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--dawn);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
}

:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }
h1, h2, h3, h4 { font-family: var(--display); margin: 0; line-height: 1.1; }
p { margin: 0; }
a { color: inherit; }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 1.25rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.6rem 1.25rem;
  font: inherit;
  font-weight: 500;
  text-decoration: none;
  border-radius: 12px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover:not(:disabled) { transform: translateY(-2px); }
.btn:active:not(:disabled) { transform: translateY(0); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.amber { background: var(--amber); color: var(--night); }
.btn.amber:hover:not(:disabled) { background: var(--amber-dark); }
.btn.ghost { border-color: rgba(255, 255, 255, 0.6); color: #fff; background: transparent; }
.btn.ghost:hover:not(:disabled) { background: rgba(255, 255, 255, 0.12); }
.btn.dark { background: var(--night); color: #fff; }
.btn.dark:hover { background: var(--night-2); }

.nav {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(0.8rem + env(safe-area-inset-top, 0px)) 1.25rem 0.8rem;
  background: rgba(15, 24, 48, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  flex-wrap: wrap;
}
.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.35rem;
  text-decoration: none;
  letter-spacing: -0.01em;
}
.menu-btn {
  font: inherit;
  color: #fff;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 10px;
  padding: 0.45rem 0.95rem;
  min-height: 44px;
  cursor: pointer;
}
.menu { display: none; width: 100%; flex-direction: column; padding-top: 0.6rem; }
.menu[data-open="true"] { display: flex; }
.menu a {
  display: block;
  padding: 0.85rem 0.25rem;
  text-decoration: none;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.85);
}
.menu a.active { color: var(--amber); }

@media (min-width: 820px) {
  .nav { flex-wrap: nowrap; padding-left: max(1.25rem, calc((100vw - 980px) / 2 + 1.25rem)); padding-right: max(1.25rem, calc((100vw - 980px) / 2 + 1.25rem)); }
  .menu-btn { display: none; }
  .menu { display: flex; flex-direction: row; width: auto; padding: 0; gap: 0.4rem; }
  .menu a { border: 0; padding: 0.5rem 0.8rem; border-radius: 8px; }
  .menu a:hover { background: rgba(255, 255, 255, 0.1); }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  display: grid;
  gap: 2rem;
  align-items: center;
  padding: 2.25rem 1.25rem 3rem;
  color: #fff;
  background:
    radial-gradient(110% 70% at 85% 115%, rgba(244, 178, 102, 0.6), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, var(--night-2) 100%);
  overflow: hidden;
}
@media (min-width: 820px) {
  .hero {
    grid-template-columns: 1.1fr 0.9fr;
    padding: 3.5rem max(1.25rem, calc((100vw - 980px) / 2 + 1.25rem)) 4.25rem;
  }
}

.hero h1 {
  font-size: clamp(2rem, 6.5vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}
.lead { margin-top: 1rem; max-width: 44ch; font-size: 1.05rem; color: rgba(255, 255, 255, 0.85); }
.hero-actions { margin-top: 1.75rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero-note { margin-top: 1.1rem; font-size: 0.9rem; color: rgba(255, 255, 255, 0.65); }

.eye-wrap { display: grid; place-items: center; }
.eye { width: min(100%, 340px); height: auto; overflow: visible; }
.eye-white { fill: #f5f7fb; }
.iris { fill: var(--sea); }
.pupil { fill: var(--night); }
.glint { fill: #fff; opacity: 0.9; }
.eye-outline { fill: none; stroke: #fff; stroke-width: 4; stroke-linejoin: round; }
.lid rect { fill: #24365f; }
.lash { fill: none; stroke: #0b1224; stroke-width: 7; stroke-linecap: round; }
.lid { animation: droop 7s ease-in-out infinite; transform: translateY(-132px); }
.iris, .pupil, .glint { animation: drift 7s ease-in-out infinite; }

@keyframes droop {
  0%, 45%  { transform: translateY(-132px); }
  78%      { transform: translateY(-10px); }
  84%      { transform: translateY(-2px); }
  90%      { transform: translateY(-132px); }
  100%     { transform: translateY(-132px); }
}
@keyframes drift {
  0%, 45%  { transform: translateY(0); }
  80%      { transform: translateY(8px); }
  90%, 100%{ transform: translateY(0); }
}

.block { padding: 3rem 0; }
.block.alt { background: var(--paper); }
.block h2, .detector h2 { font-size: clamp(1.6rem, 4.5vw, 2.2rem); font-weight: 700; letter-spacing: -0.02em; }
.intro { margin-top: 0.7rem; max-width: 56ch; color: var(--soft); font-size: 1.02rem; }

.two { margin-top: 1.75rem; display: grid; gap: 1.25rem; }
.who { background: var(--paper); border-radius: var(--radius); padding: 1.6rem; border-left: 6px solid var(--amber); }
.who h3 { font-size: 1.25rem; margin-bottom: 0.6rem; }
.who p { color: var(--soft); }
@media (min-width: 760px) { .two { grid-template-columns: 1fr 1fr; } }

.steps { list-style: none; margin: 1.75rem 0 0; padding: 0; display: grid; gap: 1.5rem; }
.steps li { border-top: 4px solid var(--sea); padding-top: 1rem; }
.steps h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.steps p { color: var(--soft); }
@media (min-width: 760px) { .steps { grid-template-columns: repeat(3, 1fr); gap: 2rem; } }

.btn.small { min-height: 40px; padding: 0.4rem 1rem; font-size: 0.92rem; }
.tools { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; margin-top: 0.9rem; }
.sens { display: flex; align-items: center; gap: 0.5rem; font-size: 0.92rem; color: rgba(255, 255, 255, 0.85); }
.sens select { font: inherit; color: var(--ink); background: #fff; border: 0; border-radius: 10px; padding: 0.4rem 0.7rem; min-height: 40px; }
.tip { margin-top: 0.9rem; padding: 0.7rem 0.9rem; border-radius: 12px; background: rgba(244, 178, 102, 0.16); border-left: 4px solid var(--amber); font-size: 0.9rem; color: rgba(255, 255, 255, 0.9); }
.bars h5 { font-family: var(--display); font-size: 0.9rem; margin: 0.6rem 0 0.1rem; color: var(--soft); font-weight: 500; }
.bars h5:first-child { margin-top: 0; }

.detector { background: var(--night); color: #fff; padding: 3rem 0; }
.detector .intro { color: rgba(255, 255, 255, 0.75); }
.layout { margin-top: 1.5rem; display: grid; gap: 1.75rem; grid-template-columns: 1fr; }
@media (min-width: 860px) { .layout { grid-template-columns: minmax(0, 400px) minmax(0, 1fr); align-items: start; } }

.frame {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  background: #0a1122;
  border-radius: var(--radius);
  overflow: hidden;
  border: 4px solid rgba(255, 255, 255, 0.2);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
#webcam-container canvas { display: block; width: 100%; height: 100%; object-fit: cover; }
.placeholder { position: absolute; inset: 0; display: grid; place-items: center; padding: 2rem; text-align: center; color: #b8c4d8; }
.placeholder[hidden] { display: none; }
.pill {
  position: absolute; left: 0.9rem; bottom: 0.9rem;
  padding: 0.35rem 0.85rem; border-radius: 999px;
  background: rgba(10, 17, 34, 0.85); color: #fff; font-weight: 500; font-size: 0.95rem;
}
body[data-state="ok"] .frame { border-color: var(--ok); box-shadow: 0 0 0 6px rgba(47, 143, 91, 0.25); }
body[data-state="warn"] .frame { border-color: var(--amber); box-shadow: 0 0 0 6px rgba(244, 178, 102, 0.3); }
body[data-state="alarm"] .frame { border-color: var(--alarm); }

.controls { display: flex; gap: 0.75rem; margin-top: 1rem; flex-wrap: wrap; }
.controls .btn { flex: 1 1 140px; }
.note { margin-top: 0.9rem; font-size: 0.9rem; color: rgba(255, 255, 255, 0.65); }

.panel { background: var(--paper); color: var(--ink); border-radius: var(--radius); padding: 1.75rem; }
.panel h3 { font-size: 1.6rem; letter-spacing: -0.01em; }
.panel h3 + p { margin-top: 0.5rem; color: var(--soft); max-width: 46ch; }
.panel h4 { font-size: 1.05rem; margin: 1.6rem 0 0.7rem; }
body[data-state="ok"] #status-title { color: var(--ok); }
body[data-state="warn"] #status-title { color: var(--warn); }

.meter { height: 16px; background: var(--dawn); border-radius: 999px; overflow: hidden; }
.meter-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--amber), var(--alarm)); border-radius: 999px; transition: width 0.12s linear; }
.meter-hint { margin-top: 0.5rem; font-size: 0.9rem; color: var(--soft); }

.bars { display: grid; gap: 0.7rem; }
.bars .empty { color: var(--soft); font-size: 0.95rem; }
.bar-row { display: grid; grid-template-columns: 7.5rem 1fr 3.2rem; align-items: center; gap: 0.75rem; font-size: 0.95rem; }
.bar-track { height: 12px; background: var(--dawn); border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; width: 0%; background: var(--sea); border-radius: 999px; transition: width 0.12s linear; }
.bar-row.is-drowsy .bar-fill { background: var(--alarm); }
.bar-row.is-yawn .bar-fill { background: var(--warn); }
.bar-value { text-align: right; font-variant-numeric: tabular-nums; color: var(--soft); }

.stats { margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem 1.5rem; }
.stats dt { font-size: 0.9rem; color: var(--soft); }
.stats dd { margin: 0; font-family: var(--display); font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }

.about { display: grid; gap: 2rem; }
@media (min-width: 820px) { .about { grid-template-columns: 1.4fr 1fr; gap: 3rem; } }
.about-text p { margin-top: 0.8rem; color: var(--soft); max-width: 60ch; }
.about-text h2 { margin-bottom: 0.5rem; }
.about-side h3 { font-size: 1.3rem; margin-bottom: 1rem; }
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.55rem; }
.chips li { background: var(--paper); border: 2px solid var(--line); border-radius: 999px; padding: 0.3rem 0.95rem; font-weight: 500; font-size: 0.95rem; transition: border-color 0.15s ease, transform 0.15s ease; }
.chips li:hover { border-color: var(--sea); transform: translateY(-2px); }

.sub { margin: 2.5rem 0 1rem; font-size: 1.5rem; }
.projects { display: grid; gap: 1.25rem; }
@media (min-width: 760px) { .projects { grid-template-columns: repeat(3, 1fr); } }
.project { background: var(--paper); border-radius: var(--radius); padding: 1.5rem; display: flex; flex-direction: column; gap: 0.7rem; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.project:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(22, 33, 58, 0.12); }
.project h4 { font-size: 1.3rem; }
.project p { color: var(--soft); flex: 1; }
.project .btn { align-self: flex-start; margin-top: 0.4rem; }

.contact { background: linear-gradient(180deg, var(--night-2), var(--night)); color: #fff; }
.contact .intro { color: rgba(255, 255, 255, 0.75); }
.contact-actions { margin-top: 1.75rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }

.foot { background: var(--night); color: rgba(255, 255, 255, 0.6); padding: 1.5rem 1.25rem calc(2rem + env(safe-area-inset-bottom, 0px)); font-size: 0.88rem; display: grid; gap: 0.5rem; }
.foot p { max-width: 980px; margin: 0 auto; width: 100%; }

/* ---------- Scroll reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

.alarm {
  position: fixed; inset: 0; z-index: 20;
  display: grid; place-items: center;
  padding: calc(1.5rem + env(safe-area-inset-top, 0px)) 1.5rem calc(1.5rem + env(safe-area-inset-bottom, 0px));
  background: var(--alarm); color: var(--alarm-ink); text-align: center;
  animation: flash 0.7s steps(1, end) infinite;
}
.alarm[hidden] { display: none; }
.alarm-inner { max-width: 640px; }
.alarm h2 { font-size: clamp(2.4rem, 10vw, 4.5rem); font-weight: 700; letter-spacing: -0.02em; }
.alarm p { margin: 1.25rem auto 2rem; font-size: 1.25rem; max-width: 36ch; }
.alarm-btn { background: var(--alarm-ink); color: #8f2410; font-size: 1.2rem; padding: 0.9rem 2rem; min-height: 56px; }
.alarm-btn:hover { background: #fff !important; }
.alarm :focus-visible { outline-color: #fff; }
@keyframes flash { 0% { background: var(--alarm); } 50% { background: #c2341b; } }

@media (max-width: 480px) {
  .bar-row { grid-template-columns: 5.5rem 1fr 3rem; gap: 0.5rem; }
  .panel { padding: 1.25rem; }
  .block, .detector { padding: 2.5rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .alarm, .lid, .iris, .pupil, .glint { animation: none; }
  .lid { transform: translateY(-132px); }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .bar-fill, .meter-fill, .btn, .project, .chips li { transition: none; }
}