:root {
  --bg: #0f172a;           /* slate-900 */
  --panel: #111827;        /* gray-900 */
  --text: #e5e7eb;         /* gray-200 */
  --muted: #94a3b8;        /* slate-400 */
  --accent: #22c55e;       /* green-500 */
  --accent-2: #10b981;     /* emerald-500 */
  --warn: #f59e0b;         /* amber-500 */
  --danger: #ef4444;       /* red-500 */
  --ok: #60a5fa;           /* blue-400 */
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 18px;
  --btn-radius: 14px;
  --gap: 14px;
  --font: ui-rounded, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --digit-font: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --digit-size: clamp(48px, 13vw, 120px);
}
[data-theme="light"] {
  --bg: #f8fafc;          /* slate-50 */
  --panel: #ffffff;       /* white */
  --text: #0f172a;        /* slate-900 */
  --muted: #475569;       /* slate-600 */
  --shadow: 0 10px 30px rgba(0,0,0,.12);
}

html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 800px at 70% -20%, rgba(34,197,94,.12), transparent 60%),
              radial-gradient(1000px 600px at -10% 110%, rgba(59,130,246,.12), transparent 60%),
              var(--bg);
  color: var(--text);
  display: grid;
  place-items: center;
  padding: 18px;
}

.app {
  width: min(980px, 100%);
  box-shadow: var(--shadow);
  background: var(--panel);
  border-radius: var(--radius);
  overflow: clip;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 800; letter-spacing: .3px;
}
.brand .logo {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid; place-items: center; color: white; font-weight: 900;
  box-shadow: inset 0 2px 8px rgba(0,0,0,.2);
}
.brand small { color: var(--muted); font-weight: 600; }

.controls {
  display: flex; flex-wrap: wrap; gap: var(--gap);
  align-items: center; justify-content: flex-end;
}
.control-btn {
  appearance: none; border: none; cursor: pointer; user-select: none;
  padding: 10px 14px; border-radius: var(--btn-radius);
  font-weight: 800; letter-spacing: .3px;
  background: rgba(255,255,255,.06); color: var(--text);
  transition: transform .06s ease, background .2s ease;
}
.control-btn:hover { transform: translateY(-1px); background: rgba(255,255,255,.1); }
.control-btn:active { transform: translateY(0); }

.main {
  display: grid; gap: 0; grid-template-columns: 1fr; 
}

.display {
  display: grid; place-items: center; text-align: center; padding: 20px 16px 8px;
}

.digits { 
  font-family: var(--digit-font); font-variant-numeric: tabular-nums; 
  font-weight: 800; letter-spacing: -2px; line-height: 1; 
  font-size: var(--digit-size);
  display: inline-flex; gap: .08em;
  background: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.75));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 1px 0 rgba(0,0,0,.2);
}
.status { margin-top: 8px; color: var(--muted); font-weight: 700; letter-spacing: .4px; }

.panel {
  padding: 12px 16px 20px; border-top: 1px solid rgba(255,255,255,.06);
}

.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 12px; }
.tab { 
  padding: 10px 12px; text-align: center; font-weight: 800; letter-spacing: .3px; cursor: pointer;
  border-radius: var(--btn-radius); background: rgba(255,255,255,.06);
  user-select: none;
}
.tab[aria-selected="true"] { background: linear-gradient(135deg, rgba(34,197,94,.3), rgba(16,185,129,.3)); }

.grid { display: grid; gap: var(--gap); grid-template-columns: 1fr; }
@media (min-width: 720px) { .grid { grid-template-columns: 1fr 1fr; } }

.card { background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.06); padding: 12px; border-radius: var(--radius); }

.field { display: grid; gap: 6px; }
.field label { font-weight: 800; color: var(--muted); }
.time-inputs { display: flex; gap: 8px; }
.time-inputs input {
  width: 100%; padding: 12px; border-radius: var(--btn-radius); border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06); color: var(--text); font-weight: 800; font-size: 16px; text-align: center;
}
.time-inputs input:focus { outline: 2px solid var(--accent); border-color: transparent; }

.presets { display: flex; flex-wrap: wrap; gap: 8px; }
.preset {
  padding: 10px 12px; border-radius: var(--btn-radius); border: none; cursor: pointer; color: var(--text);
  background: rgba(34,197,94,.18); font-weight: 800; letter-spacing: .3px;
}
.preset.alt { background: rgba(96,165,250,.18); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.btn {
  flex: 1 1 140px; min-width: 120px; padding: 14px 16px; font-size: 18px; font-weight: 900; letter-spacing: .5px;
  border-radius: var(--btn-radius); border: none; cursor: pointer; color: white; text-transform: uppercase;
  box-shadow: 0 8px 20px rgba(0,0,0,.25);
  transition: transform .06s ease, box-shadow .2s ease, filter .15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 30px rgba(0,0,0,.3); }
.btn:active { transform: translateY(0); filter: brightness(.98); }

.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.btn-warn { background: linear-gradient(135deg, #f59e0b, #f97316); }
.btn-danger { background: linear-gradient(135deg, #ef4444, #dc2626); }
.btn-neutral { background: linear-gradient(135deg, #64748b, #475569); }

.options { display: grid; gap: 10px; grid-template-columns: 1fr 1fr; }
@media (min-width: 720px) { .options { grid-template-columns: 1fr 1fr 1fr 1fr; } }

.option { display: grid; gap: 6px; }
.option select, .option input[type="checkbox"] { 
  padding: 10px; border-radius: var(--btn-radius); border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06); color: var(--text); font-weight: 700;
}

.footer { padding: 12px 16px; color: var(--muted); font-size: 14px; display: flex; justify-content: space-between; gap: 10px; align-items: center; }
.kbd { font-family: var(--digit-font); background: rgba(255,255,255,.08); padding: 2px 6px; border-radius: 6px; border: 1px solid rgba(255,255,255,.12); }

/* finish flash */
.flash { animation: flash 1s steps(2, start) 4; }
@keyframes flash { to { background: #111 !important; } }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--panel);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.site-header::after {
  content: "";
  display: block;
  height: 1px;
  background: rgba(255,255,255,.08);
  box-shadow: 0 2px 4px rgba(0,0,0,.35);
}
.nav-wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 10px 18px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 900;
}
.logo {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--accent);
  color: #0f172a;
}
.site-nav {
  display: flex;
  gap: 14px;
  justify-content: flex-end;
}
.site-nav .nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  opacity: .9;
}
.site-nav .nav-link:hover {
  opacity: 1;
}
.nav-toggle {
  display: none;
  background: #0b1220;
  color: #fff;
  border: 1px solid #1f2937;
  border-radius: 10px;
  padding: .4rem .6rem;
  font-weight: 900;
}

/* Mobile Drawer */
.mobile-drawer {
  background: var(--panel);
  border-bottom: 1px solid #1f2937;
}
.mobile-nav {
  max-width: 980px;
  margin: 0 auto;
  padding: 10px 18px;
  display: grid;
  gap: 8px;
}
.mobile-nav .nav-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  padding: .4rem 0;
  border-bottom: 1px dashed #233047;
}
.mobile-nav .nav-link:last-child {
  border-bottom: none;
}
@media (max-width: 760px) {
  .site-nav { display: none; }
  .nav-toggle { display: inline-block; }
}

/* Pomodoro ring + big screen */
.ring-wrap { display:grid; place-items:center; margin:.25rem 0; }
.ring { position:relative; width:min(340px,82vw); aspect-ratio:1; }
.ring-svg { width:100%; height:100%; transform:rotate(-90deg); }
.ring-bg  { fill:none; stroke:#1f2937; stroke-width:12; }      /* matches gray-800 feel */
.ring-fg  { fill:none; stroke:var(--accent); stroke-width:12; stroke-linecap:round; transition:stroke .25s ease; }
.ring-label { position:absolute; inset:0; display:grid; place-items:center; font-weight:900; letter-spacing:-.5px; font-size:clamp(26px,5vw,36px); color:var(--text); }
.hide { display:none!important; }

/* Big Screen: simply crank the CSS variable for digits size */
.big { --digit-size: clamp(80px, 22vw, 200px); }

/* ===== Page namespaces: keep page tweaks isolated ===== */
.home .card,
.pomodoro .card,
.countdown .card,
.stopwatch .card {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Centered card layout for all timers */
.pomodoro .card,
.countdown .card,
.stopwatch .card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Space harmony inside cards */
.card .title { margin: 0 0 8px; }
.card .status { margin: 0 0 12px; color: var(--muted); font-weight: 800; }
.card .actions, .card .row { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* Inputs block: stacked labels above inputs, consistent widths */
.card .field { display: grid; gap: .35rem; min-width: 120px; text-align: center; }
.card input[type="number"] {
  width: 100%;
  padding: 12px;
  border-radius: var(--btn-radius);
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.06);
  color: var(--text);
  font-weight: 800;
  text-align: center;
}

/* Preset/aux cards look lighter and never double up borders */
.card .card {
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
}

/* Ring: single source of truth */
.ring-wrap { display: grid; place-items: center; margin: .25rem 0; }
.ring { position: relative; width: min(340px, 82vw); aspect-ratio: 1; }
.ring-svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: #1f2937; stroke-width: 12; } /* gray-800 */
.ring-fg { fill: none; stroke: var(--accent); stroke-width: 12; stroke-linecap: round; transition: stroke .25s ease; }
.ring-label { position: absolute; inset: 0; display: grid; place-items: center; font-weight: 900; letter-spacing: -.5px; font-size: clamp(26px, 5vw, 36px); color: var(--text); }
.hide { display: none !important; }

/* Digits everywhere */
.digits { font-size: var(--digit-size); font-family: var(--digit-font); font-weight: 900; letter-spacing: -2px; }

/* Header line/shadow: avoid double separators with first card */
.site-header { border-bottom: 1px solid rgba(255,255,255,.12); box-shadow: 0 6px 20px rgba(0,0,0,.25); }
.wrap > .card:first-of-type { margin-top: 14px; } /* space off the header line */

/* Button polish consistency */
.btn { border: none; border-radius: var(--btn-radius); padding: .75rem 1.15rem; font-weight: 900; cursor: pointer; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.btn-neutral { background: #2b3343; color: #fff; }
.btn-danger  { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; }

/* Checkbox alignment everywhere */
.checkbox-label { display: flex; align-items: center; gap: .6rem; font-weight: 800; color: var(--text); }
.checkbox-label input[type="checkbox"] { width: 1.5rem; height: 1.5rem; accent-color: var(--accent); margin: 0; }

/* Prevent accidental global left-aligns */
.status, .title { text-align: center; }

/* Optional: dark-first paint (if any page still flashes on nav) */
@media (prefers-reduced-motion: no-preference) {
  html { background: #0f172a; }       /* slate-900 */
  body { background: transparent; color: #e5e7eb; }
}