:root {
  color-scheme: light;
  --page: #f0fdfa;
  --surface: #ffffff;
  --surface-soft: #ecfeff;
  --text: #134e4a;
  --muted: #4b7b77;
  --line: rgba(19, 78, 74, 0.12);
  --line-strong: rgba(19, 78, 74, 0.2);
  --primary: #0d9488;
  --primary-soft: rgba(13, 148, 136, 0.12);
  --accent: #f97316;
  --danger: #dc2626;
  --success: #0f766e;
  --radius-lg: 28px;
  --radius-md: 18px;
  --shadow: 0 24px 60px rgba(13, 78, 74, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(13, 148, 136, 0.18), transparent 26%),
    linear-gradient(180deg, #ffffff 0%, var(--page) 100%);
  color: var(--text);
  font-family: "Inter", sans-serif;
}

button,
input,
a {
  font: inherit;
}

button,
a {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

.page-shell {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 44px;
}

.hero-card,
.surface-card,
.stat-card,
.metric-card,
.task-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-card {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 18px;
  padding: 26px;
}

.hero-copy h1 {
  margin: 16px 0 14px;
  max-width: 11ch;
  font-size: clamp(2.8rem, 5vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: -0.05em;
}

.hero-copy p,
.section-head p,
.form-feedback,
.task-meta,
.empty-copy,
.metric-card small,
.stat-card small {
  color: var(--muted);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.ghost-button,
.task-form button,
.quick-chip,
.filter-button,
.clear-button,
.task-action,
.text-link {
  min-height: 48px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.ghost-button,
.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
}

.ghost-button {
  background: var(--surface-soft);
  border-color: rgba(13, 148, 136, 0.18);
  color: var(--primary);
  font-weight: 700;
}

.text-link {
  border-color: var(--line);
  color: var(--text);
  font-weight: 600;
}

.hero-panel {
  display: grid;
  gap: 14px;
}

.metric-card {
  padding: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fffe 100%);
}

.metric-card span,
.stat-card span,
.section-label {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.metric-card strong,
.stat-card strong {
  display: block;
  margin-top: 14px;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.metric-card small,
.stat-card small {
  display: block;
  margin-top: 10px;
}

.app-grid {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.surface-card,
.board-card {
  padding: 22px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.section-head p {
  margin: 0;
  max-width: 320px;
}

.task-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
}

.task-form input {
  min-height: 54px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  color: var(--text);
  background: #ffffff;
}

.task-form input:focus-visible,
.filter-button:focus-visible,
.clear-button:focus-visible,
.task-action:focus-visible,
.quick-chip:focus-visible,
.ghost-button:focus-visible,
.text-link:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.18);
  outline-offset: 2px;
}

.task-form button {
  padding: 0 20px;
  border: 0;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
}

.quick-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.quick-chip,
.filter-button,
.clear-button,
.task-action {
  padding: 0 16px;
  border-color: var(--line);
  background: #ffffff;
  color: var(--text);
  font-weight: 600;
}

.form-feedback {
  min-height: 28px;
  margin: 14px 0 0;
}

.form-feedback[data-tone="error"] {
  color: var(--danger);
}

.form-feedback[data-tone="success"] {
  color: var(--success);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 20px;
}

.board-head {
  margin-bottom: 14px;
}

.progress-block {
  margin-bottom: 16px;
}

.progress-track {
  height: 12px;
  border-radius: 999px;
  background: rgba(13, 148, 136, 0.1);
  overflow: hidden;
}

.progress-bar {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary) 0%, #14b8a6 100%);
  transition: width 180ms ease;
}

.board-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-button.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.clear-button {
  color: var(--danger);
}

.ghost-button:hover,
.task-form button:hover,
.quick-chip:hover,
.filter-button:hover,
.clear-button:hover,
.task-action:hover,
.text-link:hover {
  transform: translateY(-1px);
}

.task-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.task-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 16px;
}

.task-toggle {
  width: 22px;
  height: 22px;
  margin: 0;
  accent-color: var(--primary);
}

.task-title {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.task-meta {
  display: block;
  margin-top: 6px;
  font-size: 0.92rem;
}

.task-item.is-done .task-title {
  color: var(--muted);
  text-decoration: line-through;
}

.task-action {
  min-width: 92px;
}

.empty-state {
  padding: 30px 18px;
  border: 1px dashed rgba(13, 148, 136, 0.22);
  border-radius: var(--radius-md);
  background: rgba(13, 148, 136, 0.04);
  text-align: center;
}

.empty-state strong {
  display: block;
  font-size: 1.12rem;
}

.empty-copy {
  margin: 10px 0 0;
}

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

@media (max-width: 860px) {
  .hero-card,
  .stats-grid,
  .task-form {
    grid-template-columns: 1fr;
  }

  .section-head,
  .board-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: min(100% - 20px, 1040px);
    padding: 20px 0 30px;
  }

  .hero-card,
  .surface-card,
  .board-card,
  .stat-card,
  .metric-card {
    padding: 18px;
    border-radius: 24px;
  }

  .hero-copy h1 {
    font-size: clamp(2.2rem, 14vw, 3rem);
  }

  .task-form button,
  .filter-button,
  .clear-button,
  .task-action,
  .ghost-button,
  .text-link {
    width: 100%;
  }

  .hero-actions,
  .quick-row,
  .filter-row {
    display: grid;
    grid-template-columns: 1fr;
  }

  .task-item {
    grid-template-columns: auto 1fr;
  }

  .task-action {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}