*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0b0f14;
  --bg-card: #141a22;
  --bg-input: rgba(0, 0, 0, 0.25);
  --border: rgba(255, 255, 255, 0.08);
  --text: #eef2f7;
  --text-muted: rgba(238, 242, 247, 0.55);
  --accent: #3dd6c6;
  --accent-hover: #2fc4b4;
  --accent-soft: rgba(61, 214, 198, 0.12);
  --danger: #ff6b6b;
  --warn: #ffb04a;
  --ok: #7dd87d;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

[data-theme="light"] {
  --bg: #f3f5f7;
  --bg-card: #ffffff;
  --bg-input: #eef1f4;
  --border: rgba(15, 23, 32, 0.12);
  --text: #12181f;
  --text-muted: rgba(18, 24, 31, 0.58);
  --accent: #0d9b8c;
  --accent-hover: #0b877a;
  --accent-soft: rgba(13, 155, 140, 0.12);
  --danger: #d64545;
  --warn: #c47b12;
  --ok: #2a8a3d;
  --shadow: 0 14px 36px rgba(18, 24, 31, 0.08);
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 45% at 80% 0%, rgba(61, 214, 198, 0.1), transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 100%, rgba(94, 179, 255, 0.07), transparent 50%);
}

.page {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.page.wide {
  max-width: 780px;
}

.page.xl {
  max-width: 920px;
}

.topbar {
  margin-bottom: 1.5rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
}

.back-link:hover {
  color: var(--accent);
}

.topbar h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card {
  padding: 1.5rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow);
}

.card + .card {
  margin-top: 1rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}

.row-split {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .row-split {
    grid-template-columns: 1fr 1fr;
  }
}

.btn {
  padding: 0.65rem 1.1rem;
  border-radius: 10px;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  background: transparent;
  color: var(--text);
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--accent);
  color: #061210;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text-muted);
}

.btn-ghost:hover:not(:disabled) {
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text);
}

.btn-accent {
  background: var(--accent-soft);
  border-color: rgba(61, 214, 198, 0.3);
  color: var(--accent);
}

.btn-accent:hover:not(:disabled) {
  background: rgba(61, 214, 198, 0.2);
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.field label,
.field-head label,
legend {
  font-size: 0.9rem;
  font-weight: 500;
}

.field-value {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.85rem;
  color: var(--accent);
}

input[type="text"],
input[type="number"],
input[type="url"],
input[type="email"],
input[type="datetime-local"],
input[type="date"],
input[type="time"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
  font: inherit;
  font-size: 0.95rem;
}

textarea {
  min-height: 10rem;
  resize: vertical;
  line-height: 1.55;
}

textarea.tall {
  min-height: 16rem;
}

textarea.mono,
input.mono,
.mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.88rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

input[type="color"] {
  width: 3rem;
  height: 2.4rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

select {
  cursor: pointer;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(61, 214, 198, 0.35);
  outline-offset: 1px;
  border-color: rgba(61, 214, 198, 0.45);
}

.output,
.password-display {
  display: block;
  width: 100%;
  min-height: 3.25rem;
  padding: 0.85rem 1rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-input);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.95rem;
  font-weight: 500;
  word-break: break-all;
  color: var(--text);
  white-space: pre-wrap;
}

.output.lg {
  min-height: 8rem;
}

.check,
.radio {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0;
  cursor: pointer;
  font-size: 0.92rem;
}

.check input,
.radio input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}

fieldset.options {
  margin: 0;
  padding: 0;
  border: none;
}

.options legend {
  margin-bottom: 0.5rem;
}

.hint {
  min-height: 1.25rem;
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

.hint.success {
  color: var(--accent);
}

.hint.error {
  color: var(--danger);
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

@media (min-width: 560px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat {
  padding: 0.75rem 0.7rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-input);
  text-align: center;
}

.stat-value {
  display: block;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent);
}

.stat-label {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.tabs {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tab {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.tab[aria-selected="true"],
.tab.active {
  background: var(--accent-soft);
  border-color: rgba(61, 214, 198, 0.35);
  color: var(--accent);
}

.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 8rem;
  padding: 1.25rem;
  border-radius: 12px;
  border: 1px dashed var(--border);
  background: var(--bg-input);
  color: var(--text-muted);
  text-align: center;
  cursor: pointer;
}

.drop.over {
  border-color: var(--accent);
  color: var(--accent);
}

.preview {
  display: block;
  max-width: 100%;
  max-height: 280px;
  margin: 0 auto;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.canvas-wrap {
  display: flex;
  justify-content: center;
  padding: 0.75rem;
  border-radius: 12px;
  background: #fff;
}

.canvas-wrap canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.swatch-row {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.swatch {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  cursor: pointer;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-ok {
  background: rgba(125, 216, 125, 0.15);
  color: var(--ok);
}

.badge-fail {
  background: rgba(255, 107, 107, 0.15);
  color: var(--danger);
}

.clock {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: clamp(2.2rem, 8vw, 3.2rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
  tabular-nums: true;
}

.laps {
  margin: 0;
  padding: 0;
  list-style: none;
  max-height: 12rem;
  overflow: auto;
}

.laps li {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.85rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.table th,
.table td {
  padding: 0.45rem 0.35rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.table th {
  color: var(--text-muted);
  font-weight: 500;
}

.muted {
  color: var(--text-muted);
}

.center {
  text-align: center;
}

.result-num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  letter-spacing: -0.03em;
}

.hidden {
  display: none !important;
}

.file-input {
  display: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}