:root {
  --bg: #f7f6fb;
  --fg: #1a1530;
  --muted: #6b6a85;
  --card: #ffffff;
  --border: #e6e3f0;
  --primary: #6d28d9;
  --primary-fg: #ffffff;
  --focus: #6d28d9;
  --short: #16a34a;
  --long: #2563eb;
  --shadow: 0 10px 40px -10px rgba(40, 20, 90, 0.18);
}
[data-theme='dark'] {
  --bg: #14111e;
  --fg: #f3f0ff;
  --muted: #a39fbf;
  --card: #1e1a2c;
  --border: rgba(255, 255, 255, 0.1);
  --primary: #a78bfa;
  --primary-fg: #14111e;
  --focus: #a78bfa;
  --short: #4ade80;
  --long: #60a5fa;
  --shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Space Grotesk', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  min-height: 100vh;
  transition: background 0.6s ease, color 0.3s ease;
}
body[data-phase='focus'] { background: radial-gradient(60% 50% at 50% 0%, color-mix(in oklab, var(--focus) 22%, transparent), transparent 70%), var(--bg); }
body[data-phase='short'] { background: radial-gradient(60% 50% at 50% 0%, color-mix(in oklab, var(--short) 22%, transparent), transparent 70%), var(--bg); }
body[data-phase='long']  { background: radial-gradient(60% 50% at 50% 0%, color-mix(in oklab, var(--long) 22%, transparent), transparent 70%), var(--bg); }

.site-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 1.5rem; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10; background: color-mix(in oklab, var(--bg) 80%, transparent);
  backdrop-filter: blur(10px);
}
.brand { display: flex; gap: .75rem; align-items: center; text-decoration: none; color: inherit; }
.brand-mark {
  display: inline-flex; width: 36px; height: 36px; align-items: center; justify-content: center;
  border-radius: 12px; background: var(--primary); color: var(--primary-fg); font-size: 1.2rem;
}
.brand strong { display: block; font-size: .9rem; }
.brand small { color: var(--muted); font-size: .7rem; }
.tabs { display: flex; gap: .25rem; }
.tab {
  background: transparent; border: 0; cursor: pointer; padding: .5rem 1rem; border-radius: 999px;
  font: inherit; color: var(--muted); transition: all .2s;
}
.tab:hover { color: var(--fg); background: color-mix(in oklab, var(--fg) 5%, transparent); }
.tab.active { background: color-mix(in oklab, var(--fg) 8%, transparent); color: var(--fg); font-weight: 600; }

.icon-btn {
  border: 1px solid var(--border); background: var(--card); cursor: pointer;
  width: 40px; height: 40px; border-radius: 999px; font-size: 1.1rem;
  display: inline-flex; align-items: center; justify-content: center;
}

main { max-width: 980px; margin: 0 auto; padding: 2rem 1.5rem 4rem; }
.page { display: none; }
.page.active { display: block; }

#page-timer { display: none; flex-direction: column; align-items: center; }
#page-timer.active { display: flex; }

.phase-tabs {
  display: inline-flex; padding: 4px; border-radius: 999px;
  border: 1px solid var(--border); background: color-mix(in oklab, var(--card) 80%, transparent);
  margin-bottom: 2rem;
}
.phase-tab {
  border: 0; background: transparent; padding: .4rem 1rem; border-radius: 999px;
  font: inherit; cursor: pointer; color: var(--muted); font-size: .85rem;
}
.phase-tab.active { background: var(--fg); color: var(--bg); font-weight: 600; }

.motivation {
  min-height: 80px; width: 100%; max-width: 560px; display: flex; align-items: center; justify-content: center;
}
.motivation .toast {
  border: 1px solid var(--border); background: color-mix(in oklab, var(--card) 90%, transparent);
  border-radius: 16px; padding: .75rem 1.25rem; text-align: center; box-shadow: var(--shadow);
  animation: floatIn .4s ease-out;
}
.motivation .toast strong { display: block; font-size: .7rem; text-transform: uppercase; letter-spacing: .2em; color: var(--primary); margin-bottom: .25rem; }
@keyframes floatIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.ring-wrap { position: relative; width: 340px; height: 340px; }
/* SVG is sized larger than the wrapper and overflows it so the glow is not clipped */
.ring {
  position: absolute;
  inset: -40px;
  width: calc(100% + 80px);
  height: calc(100% + 80px);
  transform: rotate(-90deg);
  overflow: visible;
}
.ring-bg { fill: none; stroke: var(--border); stroke-width: 14; opacity: .5; }
.ring-fg {
  fill: none; stroke-width: 14; stroke-linecap: round; transition: stroke-dashoffset 1s linear, stroke 0.4s ease;
  overflow: visible;
}
body[data-phase='focus'] .ring-fg { stroke: var(--focus); filter: drop-shadow(0 0 14px color-mix(in oklab, var(--focus) 70%, transparent)) drop-shadow(0 0 28px color-mix(in oklab, var(--focus) 35%, transparent)); }
body[data-phase='short'] .ring-fg { stroke: var(--short); filter: drop-shadow(0 0 14px color-mix(in oklab, var(--short) 70%, transparent)) drop-shadow(0 0 28px color-mix(in oklab, var(--short) 35%, transparent)); }
body[data-phase='long']  .ring-fg { stroke: var(--long);  filter: drop-shadow(0 0 14px color-mix(in oklab, var(--long) 70%, transparent)) drop-shadow(0 0 28px color-mix(in oklab, var(--long) 35%, transparent)); }

.ring-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.phase-label { margin: 0; font-size: .7rem; text-transform: uppercase; letter-spacing: .25em; font-weight: 700; }
body[data-phase='focus'] .phase-label { color: var(--focus); }
body[data-phase='short'] .phase-label { color: var(--short); }
body[data-phase='long']  .phase-label { color: var(--long); }
.time { margin: .5rem 0 0; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 4.5rem; font-weight: 700; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.session-info { margin: .25rem 0 0; font-size: .8rem; color: var(--muted); }

.dots { display: flex; gap: .5rem; margin-top: 1.5rem; }
.dots span { width: 12px; height: 12px; border-radius: 999px; border: 1px solid var(--border); }
.dots span.done { background: var(--fg); border-color: transparent; }

.controls { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; justify-content: center; }
.btn {
  font: inherit; border: 1px solid var(--border); background: var(--card); color: var(--fg);
  padding: .85rem 1.5rem; border-radius: 999px; cursor: pointer; font-weight: 600;
  display: inline-flex; align-items: center; gap: .35rem; transition: all .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-primary { background: var(--primary); color: var(--primary-fg); border-color: transparent; min-width: 160px; justify-content: center; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-ghost:hover { color: #ef4444; }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; margin-top: 2.5rem; width: 100%; max-width: 420px; }
.stat { border: 1px solid var(--border); background: color-mix(in oklab, var(--card) 80%, transparent); border-radius: 16px; padding: 1rem; text-align: center; }
.stat small { display: block; font-size: .7rem; text-transform: uppercase; letter-spacing: .15em; color: var(--muted); }
.stat strong { display: block; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 1.5rem; margin-top: .25rem; }

/* Page heads */
.page-head { max-width: 640px; margin-bottom: 3rem; }
.eyebrow { color: var(--primary); font-size: .75rem; text-transform: uppercase; letter-spacing: .25em; font-weight: 700; margin: 0; }
.page-head h1, .dev h1 { font-size: clamp(2rem, 4vw, 3rem); margin: .5rem 0; line-height: 1.1; }
.page-head h1 span { color: var(--primary); }
.lead { color: var(--muted); font-size: 1.05rem; line-height: 1.6; }

.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { border: 1px solid var(--border); background: var(--card); padding: 1.5rem; border-radius: 16px; transition: all .2s; }
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card h3 { margin: 0 0 .5rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.5; }

.h2 { margin: 3rem 0 1rem; font-size: 1.75rem; }
.steps { list-style: none; padding: 0; display: grid; gap: .75rem; }
.steps li { display: flex; gap: 1rem; align-items: center; border: 1px solid var(--border); background: var(--card); padding: 1rem 1.25rem; border-radius: 16px; }
.steps li span { width: 36px; height: 36px; border-radius: 999px; background: var(--primary); color: var(--primary-fg); display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-family: 'JetBrains Mono', monospace; }

.dev { display: grid; gap: 2.5rem; grid-template-columns: minmax(0, 1fr); align-items: center; }
@media (min-width: 720px) { .dev { grid-template-columns: minmax(0,1fr) minmax(0,1.2fr); } }
.dev-photo {
  position: relative; max-width: 360px; margin: 0 auto; border-radius: 28px; overflow: hidden;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.dev-photo img { width: 100%; height: auto; display: block; }

dialog#settings { border: 1px solid var(--border); border-radius: 20px; padding: 0; max-width: 420px; width: 90%; background: var(--card); color: var(--fg); }
dialog#settings::backdrop { background: rgba(0,0,0,.5); backdrop-filter: blur(4px); }
dialog#settings form { padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem; }
dialog#settings h3 { margin: 0; font-size: 1.25rem; }
dialog#settings label { display: flex; flex-direction: column; gap: .35rem; font-size: .85rem; font-weight: 600; }
dialog#settings input { font: inherit; padding: .65rem .9rem; border-radius: 12px; border: 1px solid var(--border); background: var(--bg); color: var(--fg); }
.dialog-actions { display: flex; gap: .5rem; justify-content: flex-end; }

.site-footer { text-align: center; padding: 1.5rem; color: var(--muted); font-size: .8rem; border-top: 1px solid var(--border); }

.header-actions { display: flex; align-items: center; gap: .35rem; }
.menu-btn { display: none; }
.mobile-nav { display: none; flex-direction: column; gap: .25rem; padding: .75rem 1.5rem; border-bottom: 1px solid var(--border); background: color-mix(in oklab, var(--bg) 95%, transparent); position: sticky; top: 65px; z-index: 9; }
.mobile-nav .tab { text-align: left; padding: .85rem 1rem; border-radius: .75rem; font-size: 1rem; }

@media (max-width: 640px) {
  .tabs { display: none; }
  .menu-btn { display: inline-flex; }
  .mobile-nav:not([hidden]) { display: flex; }
  .ring-wrap { width: 280px; height: 280px; }
  .time { font-size: 3.5rem; }
}

.stats-head { display: flex; align-items: center; justify-content: space-between; margin: 1.25rem 0 .5rem; }
.stats-head small { font-size: .7rem; text-transform: uppercase; letter-spacing: .2em; color: var(--muted-fg); }
.btn-mini { padding: .25rem .6rem; font-size: .72rem; border-radius: 999px; background: transparent; border: 1px solid var(--border); color: var(--muted-fg); cursor: pointer; }
.btn-mini:hover { color: #ef4444; border-color: #ef4444; }