:root {
  --bg: #f4f3fb;
  --surface: #ffffff;
  --text: #191733;
  --muted: #5e5c7a;
  --border: #dddaee;
  --accent: #6b46e5;
  --accent-text: #ffffff;
  --accent-soft: #eee9ff;
  --danger: #c53030;
  --ok: #18794e;
  --ok-soft: #e3f6ec;
  --warn: #9a4a12;
  --warn-soft: #fff0e6;
  --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070e1f;
    --surface: #0e1830;
    --text: #eef1ff;
    --muted: #9ea8cf;
    --border: #22305a;
    --accent: #9d82ff;
    --accent-text: #0a0f22;
    --accent-soft: #241d4d;
    --danger: #ff7b7b;
    --ok: #5fd39a;
    --ok-soft: #12302a;
    --warn: #ffb68f;
    --warn-soft: #33201c;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.45;
}

button, input, select, textarea { font: inherit; color: inherit; }

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); font-weight: 600; }
button.ghost { background: transparent; }
button.icon { padding: 4px 9px; font-size: 18px; line-height: 1; background: transparent; border-color: transparent; color: var(--muted); }
button.icon:hover { color: var(--danger); border-color: var(--border); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand strong { display: block; font-size: 17px; }
.tagline { color: var(--muted); font-size: 13px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.actions select { width: auto; border: 1px solid var(--border); border-radius: 8px; padding: 7px 8px; background: var(--surface); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px 18px;
}
.card h2 { font-size: 15px; margin: 0 0 12px; }
.card h2 small { font-weight: 400; color: var(--muted); margin-left: 6px; }
.hint { color: var(--muted); font-size: 13px; margin: 12px 0 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.grid .wide { grid-column: 1 / -1; }

label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
label.inline { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 9px;
  background: var(--bg);
  font-size: 14px;
}
textarea { resize: vertical; min-height: 70px; }
input[type="checkbox"], input[type="radio"] { width: auto; accent-color: var(--accent); }
input[type="range"] { padding: 0; border: 0; background: transparent; accent-color: var(--accent); height: 28px; }
input[type="color"] { padding: 2px; height: 36px; cursor: pointer; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  padding: 20px 22px;
  width: min(560px, calc(100vw - 32px));
}
dialog::backdrop { background: rgba(7, 14, 31, .55); }
dialog h2 { margin: 0 0 14px; font-size: 18px; }
dialog .buttons { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; margin-top: 18px; }
dialog .buttons .left { margin-right: auto; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 50;
  pointer-events: none;
}

.site-footer { padding: 8px 24px 28px; color: var(--muted); font-size: 13px; text-align: center; }
.site-footer a { color: var(--accent); }

@media (max-width: 600px) {
  .topbar { padding: 10px 16px; }
}

/* ---------- layout ---------- */

body { --mode: var(--accent); --mode-soft: var(--accent-soft); --on-mode: var(--accent-text); }
body[data-mode="short"] { --mode: #1f8fff; --mode-soft: #e3f0ff; }
body[data-mode="long"] { --mode: #d6408f; --mode-soft: #fde8f3; }
@media (prefers-color-scheme: dark) {
  body[data-mode="short"] { --mode: #4fa8ff; --mode-soft: #12264a; }
  body[data-mode="long"] { --mode: #f06aae; --mode-soft: #3a1830; }
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 24px;
  padding: 24px;
  max-width: 1500px;
  min-width: 0;
  margin: 0 auto;
  align-items: start;
}
.side { display: grid; gap: 16px; min-width: 0; }

/* ---------- timer ---------- */

.timer-card { display: grid; justify-items: center; padding: 22px 24px 20px; background: linear-gradient(180deg, var(--mode-soft), var(--surface) 55%); transition: background .3s; }
.modes { display: inline-flex; gap: 4px; padding: 4px; border-radius: 99px; background: var(--surface); border: 1px solid var(--border); }
.modes button { border: 0; border-radius: 99px; padding: 7px 16px; background: transparent; color: var(--muted); }
.modes button.on { background: var(--mode); color: var(--on-mode); font-weight: 600; }

.ring-wrap { position: relative; width: min(100%, 380px); aspect-ratio: 1; margin: 22px 0 10px; }
.ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 12; }
.ring-bg { stroke: color-mix(in srgb, var(--mode) 16%, transparent); }
.ring-fg { stroke: var(--mode); stroke-linecap: round; stroke-dasharray: 741.42; transition: stroke-dashoffset .3s linear, stroke .3s; }
.ring-text { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.clock { font-size: clamp(56px, 9vw, 86px); font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -0.03em; line-height: 1; }
.phase { color: var(--muted); margin-top: 8px; }

.dots { display: flex; gap: 8px; margin-bottom: 6px; }
.dots span { width: 10px; height: 10px; border-radius: 50%; background: color-mix(in srgb, var(--mode) 22%, transparent); }
.dots span.on { background: var(--mode); }

.working { margin: 8px 0 16px; color: var(--muted); text-align: center; min-height: 1.4em; }
.working strong { color: var(--text); }

.controls { display: flex; align-items: center; gap: 12px; }
.big-btn { min-width: 180px; padding: 13px 28px; font-size: 18px; border-radius: 99px; background: var(--mode); border-color: var(--mode); color: var(--on-mode); }
.keys { margin-top: 14px; }

/* ---------- tasks ---------- */

.add-task { display: grid; grid-template-columns: minmax(0, 1fr) 80px auto; gap: 8px; align-items: end; }
.add-task .est input { text-align: center; }
.tasks { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 6px; }
.task { display: grid; grid-template-columns: 22px minmax(0, 1fr) auto 30px; align-items: center; gap: 8px; padding: 6px 6px 6px 10px; border-radius: 8px; border: 1px solid var(--border); }
.task.active { border-color: var(--accent); background: var(--accent-soft); }
.task-title { justify-content: flex-start; border: 0; background: transparent; padding: 4px 0; text-align: left; white-space: normal; }
.task.done .task-title { text-decoration: line-through; color: var(--muted); }
.now { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--accent); margin-left: 6px; }
.count { display: flex; gap: 3px; flex-wrap: wrap; max-width: 120px; }
.count i { width: 9px; height: 9px; border-radius: 3px; border: 1.5px solid var(--accent); }
.count i.on { background: var(--accent); }
.tasks .empty { color: var(--muted); font-size: 14px; padding: 6px 0; }
.task-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 10px; font-size: 13px; color: var(--muted); min-height: 30px; }
button.small { padding: 4px 10px; font-size: 13px; }

/* ---------- stats ---------- */

.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.stat { background: var(--bg); border-radius: 8px; padding: 10px 12px; display: grid; gap: 2px; }
.stat span { font-size: 12px; color: var(--muted); }
.stat strong { font-size: 20px; font-variant-numeric: tabular-nums; }
.week p { margin: 16px 0 8px; font-size: 13px; color: var(--muted); }
.bars { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; height: 150px; }
.bar-col { display: grid; grid-template-rows: 18px 1fr 18px; justify-items: center; align-items: end; }
.bar-val { font-size: 11px; color: var(--muted); white-space: nowrap; }
.bar { width: 70%; max-width: 34px; border-radius: 6px 6px 2px 2px; background: color-mix(in srgb, var(--accent) 45%, transparent); align-self: end; }
.bar-col.today .bar { background: var(--accent); }
.bar-day { font-size: 12px; color: var(--muted); text-transform: capitalize; }
.bar-col.today .bar-day { color: var(--text); font-weight: 600; }

@media (max-width: 1000px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 600px) {
  .layout { padding: 14px; gap: 14px; }
  .modes button { padding: 6px 10px; font-size: 14px; }
  .timer-card { padding: 18px 12px; }
  .controls { gap: 8px; }
  .big-btn { min-width: 0; padding: 12px 30px; }
  .add-task { grid-template-columns: 1fr 70px; }
  .add-task button { grid-column: 1 / -1; }
}