:root {
  --bg: #f6f8fb;
  --card: rgba(255, 255, 255, 0.86);
  --text: #172033;
  --muted: #64748b;
  --line: rgba(99, 116, 139, 0.22);
  --brand: #66ccff;
  --brand-deep: #2c9eda;
  --shadow: 0 18px 48px rgba(15, 23, 42, 0.10);
  --radius: 22px;
}

html[data-theme="dark"] {
  --bg: #0b1020;
  --card: rgba(20, 28, 48, 0.86);
  --text: #e7eefc;
  --muted: #9aa8bd;
  --line: rgba(148, 163, 184, 0.22);
  --brand: #66ccff;
  --brand-deep: #8bdcff;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(102, 204, 255, 0.32), transparent 34rem),
    radial-gradient(circle at bottom right, rgba(155, 135, 245, 0.20), transparent 32rem),
    var(--bg);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  color: #062133;
  background: linear-gradient(135deg, var(--brand), #b8ecff);
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.16s ease, box-shadow 0.16s ease, opacity 0.16s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(102, 204, 255, 0.28);
}

button:active {
  transform: translateY(0);
  opacity: 0.9;
}

input,
textarea {
  width: 100%;
  color: var(--text);
  background: rgba(255, 255, 255, 0.60);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 11px 12px;
  outline: none;
}

html[data-theme="dark"] input,
html[data-theme="dark"] textarea {
  background: rgba(15, 23, 42, 0.68);
}

textarea {
  resize: vertical;
  line-height: 1.7;
}

input:focus,
textarea:focus {
  border-color: rgba(102, 204, 255, 0.92);
  box-shadow: 0 0 0 4px rgba(102, 204, 255, 0.18);
}

a {
  color: var(--text);
  text-decoration: none;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.tools-hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  margin-bottom: 22px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--brand-deep);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.04em;
}

.hero-desc {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.hero-actions a,
.ghost-btn {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.38);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 700;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.tool-card {
  min-height: 260px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.tool-card.wide {
  grid-column: span 2;
}

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.card-head h2 {
  margin: 0;
  font-size: 1.2rem;
}

.card-head span {
  color: var(--muted);
  font-size: 0.86rem;
}

.inline-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.todo-list {
  list-style: none;
  padding: 0;
  margin: 14px 0;
  display: grid;
  gap: 9px;
}

.todo-list li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.todo-list li.done span {
  color: var(--muted);
  text-decoration: line-through;
}

.todo-list .remove {
  padding: 6px 10px;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.field {
  display: grid;
  gap: 7px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.field span b {
  color: var(--text);
}

.two-buttons,
.check-row,
.copy-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.copy-row {
  margin-top: 12px;
}

.copy-row input {
  flex: 1;
  min-width: 180px;
}

.check-row {
  margin: 12px 0;
  color: var(--muted);
}

.check-row label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.check-row input {
  width: auto;
}

.result-box {
  margin-top: 14px;
  padding: 14px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  color: var(--muted);
  line-height: 1.7;
  min-height: 54px;
  background: rgba(102, 204, 255, 0.08);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-top: 14px;
}

.stats-grid div {
  padding: 14px 10px;
  border: 1px solid var(--line);
  border-radius: 16px;
  text-align: center;
}

.stats-grid b {
  display: block;
  font-size: 1.45rem;
}

.stats-grid span {
  color: var(--muted);
  font-size: 0.84rem;
}

.mini-status {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 22px, 1180px);
    padding-top: 14px;
  }

  .tools-hero {
    align-items: flex-start;
    flex-direction: column;
    padding: 22px;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .tool-card.wide {
    grid-column: span 1;
  }

  .inline-form {
    grid-template-columns: 1fr;
  }

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