/* Pulse — dark "newsroom / instrument cluster" luxury.
   Design tokens via :root. Motion only animates transform/opacity.
   Direction: deep navy ink ground, electric-blue + signal-green accents,
   one warm amber alert color. Bento grid, clear hierarchy. */

:root {
  color-scheme: dark;

  /* --- Ground & surfaces (deep navy ink) --- */
  --ink-900: oklch(16% 0.03 255);
  --ink-850: oklch(19% 0.035 255);
  --ink-800: oklch(22% 0.04 256);
  --ink-750: oklch(26% 0.045 257);
  --ink-700: oklch(31% 0.05 258);
  --surface: oklch(21% 0.038 256);
  --surface-raised: oklch(24% 0.045 257);

  --hairline: oklch(38% 0.04 258 / 0.55);
  --hairline-soft: oklch(40% 0.03 258 / 0.28);

  /* --- Type --- */
  --text-hi: oklch(97% 0.01 250);
  --text: oklch(86% 0.015 250);
  --text-dim: oklch(68% 0.02 252);
  --text-faint: oklch(56% 0.025 254);

  /* --- Accents --- */
  --accent: oklch(70% 0.17 245);          /* electric blue */
  --accent-bright: oklch(78% 0.16 240);
  --signal: oklch(80% 0.19 150);          /* signal green */
  --signal-dim: oklch(66% 0.16 152);
  --alert: oklch(74% 0.18 60);            /* warm amber alert */
  --alert-hot: oklch(64% 0.2 40);

  /* --- Recovery / zone scale --- */
  --zone-red: oklch(64% 0.2 28);
  --zone-yellow: oklch(82% 0.17 88);
  --zone-green: oklch(80% 0.19 150);

  /* --- Type scale (fluid) --- */
  --t-hero: clamp(3rem, 1.4rem + 6vw, 5.5rem);
  --t-gauge: clamp(2rem, 1.2rem + 3vw, 3rem);
  --t-xl: clamp(1.5rem, 1.1rem + 1.6vw, 2.25rem);
  --t-lg: clamp(1.15rem, 1rem + 0.7vw, 1.5rem);
  --t-md: 1rem;
  --t-sm: 0.8125rem;
  --t-xs: 0.6875rem;

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;

  /* --- Rhythm --- */
  --gap: clamp(0.75rem, 0.5rem + 0.8vw, 1.1rem);
  --pad-card: clamp(1rem, 0.7rem + 0.8vw, 1.4rem);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 22px;

  /* --- Motion --- */
  --dur-fast: 140ms;
  --dur: 280ms;
  --dur-slow: 620ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  /* --- Depth --- */
  --shadow: 0 1px 0 oklch(100% 0 0 / 0.04) inset, 0 18px 40px -28px oklch(0% 0 0 / 0.9);
  --shadow-hi: 0 1px 0 oklch(100% 0 0 / 0.07) inset, 0 30px 60px -30px oklch(0% 0 0 / 0.95);
  --glow-accent: 0 0 0 1px oklch(70% 0.17 245 / 0.4), 0 0 36px -8px oklch(70% 0.17 245 / 0.45);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: var(--t-md);
  line-height: 1.5;
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 78% -8%, oklch(30% 0.07 250 / 0.55), transparent 60%),
    radial-gradient(900px 600px at 5% 110%, oklch(28% 0.06 200 / 0.4), transparent 55%),
    var(--ink-900);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* subtle grain/atmosphere overlay — purely cosmetic, no interaction cost */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(0deg, oklch(100% 0 0 / 0.012) 0 1px, transparent 1px 3px);
  mix-blend-mode: overlay;
}

a { color: inherit; }

.app { position: relative; z-index: 1; max-width: 1380px; margin-inline: auto; padding: clamp(0.9rem, 0.5rem + 1.4vw, 2rem); }

/* ============================= Topbar ============================= */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap);
  padding-block-end: clamp(0.9rem, 0.6rem + 1vw, 1.5rem);
  margin-block-end: clamp(0.9rem, 0.6rem + 1vw, 1.5rem);
  border-bottom: 1px solid var(--hairline);
}

.brand { display: flex; align-items: center; gap: 0.7rem; margin-inline-end: auto; }

.brand__mark {
  inline-size: 38px; block-size: 38px;
  border-radius: 11px;
  display: grid; place-items: center;
  background: linear-gradient(150deg, var(--accent), oklch(62% 0.2 200));
  box-shadow: var(--glow-accent);
}
.brand__mark svg { inline-size: 22px; block-size: 22px; }

.brand__name { font-size: var(--t-lg); font-weight: 650; letter-spacing: -0.02em; color: var(--text-hi); line-height: 1; }
.brand__tag { font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-faint); }

/* Mode switcher (segmented) */
.modes {
  display: inline-flex;
  padding: 4px;
  gap: 2px;
  background: var(--ink-850);
  border: 1px solid var(--hairline-soft);
  border-radius: 999px;
}
.mode-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: var(--t-sm);
  font-weight: 550;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.mode-btn:hover { color: var(--text-hi); }
.mode-btn:active { transform: scale(0.96); }
.mode-btn[aria-pressed="true"] {
  color: var(--ink-900);
  background: linear-gradient(180deg, var(--accent-bright), var(--accent));
  box-shadow: 0 6px 18px -10px var(--accent);
}
.mode-btn:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; }

.feed-input {
  flex: 1 1 180px;
  min-inline-size: 0;
  font: inherit;
  font-size: var(--t-sm);
  color: var(--text-hi);
  background: var(--ink-850);
  border: 1px solid var(--hairline-soft);
  border-radius: 10px;
  padding: 0.45rem 0.7rem;
}
.feed-input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.feed-input[hidden] { display: none; }

/* ============================= Signal log ============================= */
.signal-log {
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  line-height: 1.7;
  color: var(--signal-dim);
  background:
    linear-gradient(180deg, oklch(18% 0.03 255 / 0.9), oklch(15% 0.025 255 / 0.95)),
    var(--ink-900);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  margin-block-end: var(--gap);
  max-block-size: 16rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.signal-log__head {
  display: flex; align-items: center; gap: 0.5rem;
  color: var(--text-faint);
  letter-spacing: 0.16em; text-transform: uppercase;
  margin-block-end: 0.3rem;
}
.signal-log__dot {
  inline-size: 7px; block-size: 7px; border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 10px var(--signal);
  animation: pulse-dot 2.4s var(--ease) infinite;
}
.signal-line { white-space: normal; overflow-wrap: anywhere; word-break: break-word; }
.signal-line .ts { color: var(--text-faint); }
.signal-line.is-ok .tag { color: var(--signal); }
.signal-line.is-info .tag { color: var(--accent-bright); }
.signal-line.is-warn .tag { color: var(--alert); }
.signal-line .tag { font-weight: 600; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.7); }
}

/* ============================= Bento grid ============================= */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gap);
  align-items: stretch;
}

.card {
  position: relative;
  grid-column: span 4;
  background: linear-gradient(180deg, var(--surface-raised), var(--surface));
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: var(--pad-card);
  box-shadow: var(--shadow);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
  overflow: hidden;
  min-inline-size: 0;
}
.card::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  background: radial-gradient(420px 180px at 100% 0%, oklch(70% 0.17 245 / 0.07), transparent 70%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
  pointer-events: none;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hi); border-color: var(--hairline); }
.card:hover::after { opacity: 1; }
.card:focus-within { border-color: oklch(70% 0.17 245 / 0.6); }

/* spans */
.card--hero { grid-column: span 5; grid-row: span 2; }
.card--strain { grid-column: span 3; grid-row: span 2; }
.card--wide { grid-column: span 8; }
.card--sleep { grid-column: span 8; }
.card--load { grid-column: span 4; grid-row: span 2; }
.card--span6 { grid-column: span 6; }

.card__label {
  display: flex; align-items: center; gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--t-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-block-end: 0.55rem;
}
.card__label .ico { inline-size: 13px; block-size: 13px; color: var(--accent-bright); flex: none; }

.metric { display: flex; align-items: baseline; gap: 0.4rem; }
.metric__val { font-size: var(--t-gauge); font-weight: 680; letter-spacing: -0.03em; color: var(--text-hi); line-height: 1; font-variant-numeric: tabular-nums; }
.metric__unit { font-size: var(--t-sm); color: var(--text-dim); font-weight: 500; }
.metric__sub { margin-block-start: 0.5rem; font-size: var(--t-sm); color: var(--text-dim); }

.statline { display: flex; flex-wrap: wrap; gap: 0.35rem 1.1rem; margin-block-start: 0.7rem; }
.stat { display: flex; flex-direction: column; gap: 1px; }
.stat__k { font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: 0.08em; color: var(--text-faint); text-transform: uppercase; }
.stat__v { font-size: var(--t-sm); font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; }

.chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: var(--t-xs); font-weight: 600;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  color: var(--text-dim);
}
.chip--good { color: var(--signal); border-color: oklch(80% 0.19 150 / 0.4); background: oklch(80% 0.19 150 / 0.08); }
.chip--warn { color: var(--alert); border-color: oklch(74% 0.18 60 / 0.4); background: oklch(74% 0.18 60 / 0.08); }
.chip--bad  { color: var(--zone-red); border-color: oklch(64% 0.2 28 / 0.45); background: oklch(64% 0.2 28 / 0.08); }
.chip--info { color: var(--accent-bright); border-color: oklch(78% 0.16 240 / 0.4); background: oklch(78% 0.16 240 / 0.08); }

/* ============================= Hero recovery ============================= */
.hero { display: flex; flex-direction: column; gap: 1rem; height: 100%; }
.hero__ring { display: flex; align-items: center; gap: clamp(1rem, 0.5rem + 2vw, 2rem); flex-wrap: wrap; }
.hero__gauge { position: relative; inline-size: clamp(150px, 12vw, 210px); flex: none; }
.hero__gauge svg { display: block; inline-size: 100%; height: auto; }
.hero__center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
}
.hero__score { font-size: var(--t-hero); font-weight: 720; letter-spacing: -0.04em; line-height: 0.9; font-variant-numeric: tabular-nums; }
.hero__zone { font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: 0.2em; text-transform: uppercase; margin-block-start: 0.3rem; }
.hero__meta { display: flex; flex-direction: column; gap: 0.9rem; flex: 1 1 160px; }
.hero__big { display: flex; flex-direction: column; gap: 0.15rem; }
.hero__big .metric__val { font-size: var(--t-xl); }
.hero__contributors { margin-block-start: auto; display: grid; gap: 0.4rem; }
.contrib { display: grid; grid-template-columns: 4.2rem 1fr auto; align-items: center; gap: 0.6rem; font-size: var(--t-sm); }
.contrib__k { color: var(--text-dim); font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: 0.06em; }
.contrib__bar { position: relative; block-size: 5px; border-radius: 999px; background: var(--ink-800); overflow: hidden; }
.contrib__fill { position: absolute; inset-block: 0; inline-size: var(--w, 0%); border-radius: 999px; transform-origin: left; }
.contrib__fill.pos { left: 50%; background: var(--signal); }
.contrib__fill.neg { right: 50%; background: var(--alert); }
.contrib__v { font-variant-numeric: tabular-nums; color: var(--text); font-size: var(--t-xs); font-family: var(--font-mono); }

/* zone coloring for the ring center text */
.zone-red { color: var(--zone-red); }
.zone-yellow { color: var(--zone-yellow); }
.zone-green { color: var(--zone-green); }

/* strain gauge (secondary hero) */
.strain { display: flex; flex-direction: column; gap: 0.8rem; height: 100%; }
.strain__gauge { display: grid; place-items: center; }
.strain__gauge svg { inline-size: clamp(120px, 9vw, 160px); height: auto; }
.strain__scale { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: var(--t-xs); color: var(--text-faint); }
.strain__sessions { margin-block-start: auto; display: grid; gap: 0.4rem; }
.session-row { display: flex; align-items: center; justify-content: space-between; font-size: var(--t-sm); padding-block: 0.25rem; border-top: 1px solid var(--hairline-soft); }
.session-row__name { color: var(--text); }
.session-row__meta { color: var(--text-dim); font-variant-numeric: tabular-nums; font-family: var(--font-mono); font-size: var(--t-xs); }

/* ============================= Sparkline / charts ============================= */
.spark { inline-size: 100%; height: auto; display: block; margin-block-start: 0.6rem; }
.ring-svg .track { fill: none; stroke: var(--ink-800); }
.ring-svg .value { fill: none; stroke-linecap: round; transition: stroke-dashoffset var(--dur-slow) var(--ease); }

/* hypnogram */
.hypno { inline-size: 100%; height: auto; display: block; }
.hypno-legend { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; margin-block-start: 0.7rem; font-size: var(--t-xs); color: var(--text-dim); }
.hypno-legend .lk { display: inline-flex; align-items: center; gap: 0.4rem; font-family: var(--font-mono); }
.hypno-legend .sw { inline-size: 11px; block-size: 11px; border-radius: 3px; }
.sleep-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: clamp(0.8rem, 0.4rem + 1.5vw, 1.6rem); align-items: start; }
.sleep-stats { display: grid; gap: 0.55rem; }
.sleep-stat { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; padding-block: 0.4rem; border-bottom: 1px solid var(--hairline-soft); }
.sleep-stat:last-child { border-bottom: 0; }
.sleep-stat__k { color: var(--text-dim); font-size: var(--t-sm); display: flex; align-items: center; gap: 0.45rem; }
.sleep-stat__k .sw { inline-size: 10px; block-size: 10px; border-radius: 3px; }
.sleep-stat__v { font-weight: 650; font-variant-numeric: tabular-nums; color: var(--text-hi); }

/* load card */
.load-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 0.6rem 1rem; margin-block: 0.8rem; }
.load-stat { display: flex; flex-direction: column; gap: 2px; }
.load-stat__k { font-family: var(--font-mono); font-size: var(--t-xs); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); }
.load-stat__v { font-size: var(--t-lg); font-weight: 660; color: var(--text-hi); font-variant-numeric: tabular-nums; line-height: 1; }
.load-stat__v small { font-size: var(--t-sm); color: var(--text-dim); font-weight: 500; }

.footer { margin-block-start: clamp(1.2rem, 0.8rem + 1.5vw, 2.2rem); padding-block-start: 1rem; border-top: 1px solid var(--hairline); color: var(--text-faint); font-size: var(--t-xs); line-height: 1.6; }
.footer code { font-family: var(--font-mono); color: var(--text-dim); }

/* ============================= Responsive ============================= */
@media (max-width: 1024px) {
  .card { grid-column: span 6; }
  .card--hero { grid-column: span 12; grid-row: auto; }
  .card--strain { grid-column: span 6; grid-row: auto; }
  .card--wide, .card--sleep { grid-column: span 12; }
  .card--load { grid-column: span 6; grid-row: auto; }
  .card--span6 { grid-column: span 6; }
}
@media (max-width: 768px) {
  .card, .card--strain, .card--load, .card--span6 { grid-column: span 12; }
  .sleep-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .topbar { gap: 0.6rem; }
  .modes { inline-size: 100%; justify-content: space-between; }
  .mode-btn { flex: 1; padding-inline: 0.4rem; }
}

/* ============================= Accessibility ============================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}
.sr-only {
  position: absolute; inline-size: 1px; block-size: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
:focus-visible { outline: 2px solid var(--accent-bright); outline-offset: 2px; border-radius: 4px; }