/* ==========================================================================
   StudyCalm — Design System & Stylesheet (Phase 4 Tracking Integrity & Achievements)
   Theme: Calm, Mindful, Earthy Sage & Warm Slate
   ========================================================================== */

:root {
  /* Color Palette */
  --bg-app: #f6f8f6;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #edf3ee;
  --bg-subtle-hover: #e2ede4;

  /* Primary Sage Accents */
  --primary: #2d6a4f;
  --primary-hover: #21543e;
  --primary-subtle: #d8f3dc;
  --primary-glow: rgba(45, 106, 79, 0.15);

  /* Secondary Accents */
  --accent-gold: #b7791f;
  --accent-gold-bg: #fefcbf;
  --accent-blue: #2b6cb0;
  --accent-blue-bg: #ebf8ff;
  --accent-amber: #92400e;
  --accent-amber-bg: #fef3c7;

  /* Neutrals & Text */
  --text-main: #1a202c;
  --text-muted: #5a6a75;
  --text-subtle: #8a99a4;
  --border-light: #e2e8f0;
  --border-card: #e5ece6;

  /* Typography */
  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  --font-mono:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Spacing & Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 6px rgba(45, 106, 79, 0.04);
  --shadow-card: 0 4px 18px rgba(33, 84, 62, 0.06);
  --shadow-elevated: 0 10px 30px rgba(33, 84, 62, 0.08);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body.focus-mode-open {
  overflow: hidden;
}

.focus-mode-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 35%, rgba(216, 243, 220, 0.18), transparent 32rem),
    #14251d;
  color: #fff;
}

.focus-mode-overlay[hidden] {
  display: none;
}

.focus-mode-shell {
  width: min(100%, 62rem);
  min-height: 100%;
  padding: 2rem clamp(1.25rem, 4vw, 4rem);
  display: flex;
  flex-direction: column;
}

.focus-mode-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.focus-mode-brand {
  font-weight: 800;
  letter-spacing: -0.02em;
}

.focus-mode-close {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.focus-mode-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.focus-mode-label {
  margin-top: 1rem;
  color: #b7e4c7;
  font-size: 1rem;
  font-weight: 700;
}

.focus-mode-time {
  margin: 1rem 0;
  color: #fff;
  font-size: clamp(6rem, 20vw, 13rem);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  letter-spacing: -0.08em;
  line-height: .95;
}

.focus-mode-task {
  max-width: 36rem;
  margin: 0 0 2rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.15rem;
}

.focus-mode-actions {
  display: flex;
  gap: .75rem;
}

.focus-mode-actions .btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.focus-mode-hint {
  margin-top: 1.5rem;
  color: rgba(255, 255, 255, 0.52);
  font-size: .8rem;
}

.focus-mode-hint kbd {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

/* --------------------------------------------------------------------------
   Product polish: clearer hierarchy and calmer controls
   -------------------------------------------------------------------------- */
.header-container {
  gap: 1.25rem;
}

.header-right-actions {
  gap: .75rem;
}

.user-status {
  min-height: 42px;
  padding: .55rem .85rem;
  border: 1px solid var(--border-card);
  border-radius: 12px;
  background: var(--bg-subtle);
  box-shadow: none;
  font-size: .82rem;
}

.header-controls {
  gap: .35rem;
  padding: .3rem;
  border: 1px solid var(--border-card);
  border-radius: 14px;
  background: var(--bg-surface);
}

.header-controls .icon-btn {
  width: 36px;
  height: 36px;
  border-color: transparent;
  background: transparent;
}

.header-controls .icon-btn:hover,
.header-controls .icon-btn.is-active {
  background: var(--bg-subtle);
  border-color: var(--border-card);
}

.timer-card {
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 35%, rgba(216, 243, 220, .32), transparent 18rem),
    var(--bg-surface);
}

.timer-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: .35rem;
}

.pomodoro-count {
  color: var(--text-subtle);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.timer-mode-selector {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .45rem;
  padding: .35rem;
  border: 1px solid var(--border-card);
  border-radius: 14px;
  background: var(--bg-subtle);
}

.mode-btn {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: .78rem;
  font-weight: 700;
}

.mode-btn:hover {
  background: var(--bg-surface);
  color: var(--text-main);
}

.mode-btn.active {
  border-color: var(--border-card);
  background: var(--bg-surface);
  color: var(--primary);
  box-shadow: 0 3px 10px rgba(29, 67, 48, .08);
}

.timer-controls .btn {
  min-width: 150px;
}

.settings-overlay {
  background: rgba(12, 24, 18, .5);
}

.settings-card {
  max-height: min(92vh, 44rem);
  overflow: auto;
  padding: 1.75rem;
  border-radius: 20px;
  box-shadow: 0 24px 70px rgba(17, 34, 25, .2);
}

.settings-card .card-title {
  margin-top: .2rem;
  font-size: 1.35rem;
}

.settings-header {
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--border-card);
}

.settings-grid {
  gap: .75rem;
  margin: 1.25rem 0;
}

.settings-grid label {
  padding: .75rem;
  border: 1px solid var(--border-card);
  border-radius: 12px;
  background: var(--bg-subtle);
}

.settings-grid input {
  min-height: 42px;
  box-sizing: border-box;
  background: var(--bg-surface);
}

.preset-section {
  padding-top: .15rem;
}

.preset-btn {
  min-height: 66px;
  padding: .8rem;
}

.settings-toggle {
  padding: .8rem .9rem;
  border: 1px solid var(--border-card);
  border-radius: 12px;
  background: var(--bg-subtle);
}

.settings-actions {
  padding-top: 1.1rem;
  border-top: 1px solid var(--border-card);
}

.settings-actions .btn {
  min-width: 130px;
}

@media (max-width: 960px) {
  .header-container {
    flex-wrap: wrap;
  }

  .main-nav {
    order: 3;
    width: 100%;
  }

  .main-nav .nav-list {
    justify-content: center;
  }

  .header-right-actions {
    margin-left: auto;
    justify-content: space-between;
  }
}

@media (max-width: 720px) {
  .header-container {
    align-items: flex-start;
  }

  .brand {
    flex: 1 1 auto;
  }

  .header-right-actions {
    flex: 0 0 auto;
    width: auto;
    align-items: flex-end;
  }

  .header-controls {
    justify-content: center;
  }

  .user-status {
    display: none;
  }

  .main-nav .nav-list {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    scrollbar-width: none;
  }

  .main-nav .nav-list::-webkit-scrollbar {
    display: none;
  }

  .timer-mode-selector {
    grid-template-columns: 1fr;
  }

  .timer-status {
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .focus-mode-actions {
    width: 100%;
    flex-direction: column;
  }
}

/* Accessibility Focus Outline */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

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

ul {
  list-style: none;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-card);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  font-size: 1.75rem;
  background: var(--primary-subtle);
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-md);
  display: inline-flex;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.main-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary);
  background-color: var(--bg-subtle);
}

.nav-link.active {
  color: var(--primary);
  background-color: var(--primary-subtle);
  font-weight: 600;
}

.user-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-subtle);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 600;
  border: 1px solid var(--border-card);
}

.status-indicator {
  width: 8px;
  height: 8px;
  background-color: #38a169;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(56, 161, 105, 0.2);
}

.status-indicator.pulse {
  animation: indicatorPulse 2.4s ease-in-out infinite;
}

/* Structured header: navigation is a contained control group, not a slider. */
.main-nav {
  padding: 0.3rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.main-nav .nav-list {
  gap: 0.2rem;
  flex-wrap: wrap;
}

.nav-link {
  display: block;
  white-space: nowrap;
  border: 1px solid transparent;
}

.nav-link:hover {
  border-color: var(--border-card);
}

.nav-link.active {
  border-color: rgba(45, 106, 79, 0.16);
  box-shadow: 0 2px 6px rgba(45, 106, 79, 0.08);
}

.user-status {
  min-height: 42px;
  border-radius: 12px;
  white-space: nowrap;
}

@keyframes indicatorPulse {
  0%,
  100% {
    box-shadow: 0 0 0 3px rgba(56, 161, 105, 0.2);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(56, 161, 105, 0.08);
  }
}

/* --------------------------------------------------------------------------
   Main Content Layout
   -------------------------------------------------------------------------- */
.main-layout {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

/* Welcome Banner */
.welcome-banner {
  background: linear-gradient(135deg, #ffffff 0%, #edf7f0 100%);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  box-shadow: var(--shadow-sm);
  animation: calmFadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes calmFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.welcome-title {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.welcome-message {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 650px;
}

.daily-badge {
  background: #ffffff;
  border: 1px solid var(--border-card);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.badge-icon {
  font-size: 1.5rem;
}

.badge-copy {
  display: flex;
  flex-direction: column;
}

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

.badge-copy strong {
  font-size: 0.9rem;
  color: var(--primary);
}

.badge-copy span {
  font-size: 0.775rem;
  color: var(--text-muted);
}

/* Status & streak indicators */
.demo-pill {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  background-color: var(--accent-amber-bg);
  color: var(--accent-amber);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  border: 1px solid #fde68a;
  display: inline-block;
  line-height: 1.2;
}

.streak-pill {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  background-color: var(--primary-subtle);
  color: var(--primary);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid #b7e4c7;
  display: inline-block;
  line-height: 1.2;
}

.live-pill {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
  background-color: var(--accent-blue-bg);
  color: var(--accent-blue);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid #bee3f8;
  display: inline-block;
  line-height: 1.2;
}

/* --------------------------------------------------------------------------
   Overview Summary Metrics Strip (Phase 4)
   -------------------------------------------------------------------------- */
.summary-metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
  animation: calmFadeIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) 0.05s backwards;
}

.summary-metric-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

.summary-metric-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.summary-metric-icon {
  font-size: 1.75rem;
  background: var(--bg-subtle);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  display: inline-flex;
  flex-shrink: 0;
  line-height: 1;
}

.summary-metric-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.summary-metric-label {
  font-size: 0.725rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.summary-metric-value {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.summary-metric-sub {
  font-size: 0.75rem;
  color: var(--text-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --------------------------------------------------------------------------
   Dashboard Grid
   -------------------------------------------------------------------------- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
  animation: calmFadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}

.dashboard-grid > .card {
  min-width: 0;
}

.timer-card,
.goal-card,
.timeline-card,
.sync-card,
.history-card {
  overflow: hidden;
}

.timer-card,
.goal-card {
  min-height: 620px;
}

.task-card {
  grid-column: 1 / -1;
  min-height: 260px;
}

.task-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 7rem auto;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.task-form input {
  min-height: 42px;
  padding: 0.6rem 0.75rem;
  color: var(--text-main);
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  font: inherit;
}

.task-count {
  color: var(--text-subtle);
  font-size: 0.75rem;
  font-weight: 700;
}

.task-list {
  display: grid;
  gap: 0.5rem;
}

.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.65rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: 12px;
}

.task-item.is-active {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.task-item.is-done {
  opacity: 0.62;
}

.task-select {
  display: flex;
  align-items: center;
  flex: 1;
  gap: 0.7rem;
  min-width: 0;
  padding: 0.35rem;
  color: var(--text-main);
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
}

.task-check {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  color: var(--primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: 9px;
  font-weight: 800;
}

.task-copy {
  display: grid;
  gap: 0.1rem;
  min-width: 0;
}

.task-copy strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.task-copy small {
  color: var(--text-subtle);
  font-size: 0.72rem;
}

.task-progress {
  display: block;
  width: min(180px, 100%);
  height: 4px;
  margin-top: 0.35rem;
  overflow: hidden;
  background: var(--border-card);
  border-radius: 999px;
}

.task-progress span {
  display: block;
  height: 100%;
  background: var(--primary);
  border-radius: inherit;
  transition: width var(--transition-normal);
}

.task-actions {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.task-actions .icon-btn {
  width: 34px;
  height: 34px;
}

.task-empty {
  padding: 1rem;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px dashed var(--border-card);
  border-radius: 12px;
  text-align: center;
}

.timeline-card,
.sync-card,
.history-card {
  min-height: 300px;
}

.timer-card .card-header,
.goal-card .card-header,
.timeline-card .card-header,
.sync-card .card-header,
.history-card .card-header {
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--border-card);
}

/* Reusable Card Styles */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-elevated);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.card-eyebrow {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.2rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}

.card-description {
  color: var(--text-muted);
  font-size: 0.925rem;
  margin-bottom: 1.25rem;
}

/* --------------------------------------------------------------------------
   Component 1: Pomodoro Timer Card
   -------------------------------------------------------------------------- */
.mode-badge {
  background-color: var(--primary-subtle);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
}

.timer-status {
  display: grid;
  justify-items: end;
  gap: 0.35rem;
}

.pomodoro-count {
  color: var(--text-subtle);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.timer-mode-selector {
  display: flex;
  gap: 0.5rem;
  background-color: var(--bg-subtle);
  padding: 0.35rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.mode-btn {
  flex: 1;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.55rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.mode-btn:hover {
  color: var(--text-main);
}

.mode-btn:active {
  transform: scale(0.97);
}

.mode-btn.active {
  background-color: var(--bg-surface);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.timer-display-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 1rem 0 1.5rem;
}

.timer-circle {
  position: relative;
  width: 220px;
  height: 220px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.progress-ring {
  transform: rotate(-90deg);
}

.ring-bg {
  stroke: var(--bg-subtle);
}

.ring-progress {
  stroke: var(--primary);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.5s ease;
}

.timer-digits-box {
  position: absolute;
  text-align: center;
}

.timer-time {
  display: block;
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
  font-family: var(--font-sans);
}

.timer-subtext {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-subtle);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
}

.timer-controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.keyboard-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.75rem 0 0;
  color: var(--text-subtle);
  font-size: 0.72rem;
}

.keyboard-hint span {
  margin-right: 0.25rem;
  color: var(--text-muted);
  font-weight: 700;
}

kbd {
  min-width: 1.35rem;
  padding: 0.12rem 0.35rem;
  border: 1px solid var(--border-card);
  border-bottom-width: 2px;
  border-radius: 0.35rem;
  background: var(--bg-subtle);
  color: var(--text-main);
  font: 600 0.68rem var(--font-mono);
  text-align: center;
}

.btn {
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

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

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-primary:active {
  transform: scale(0.97) translateY(0);
}

.btn-secondary {
  background-color: var(--bg-subtle);
  color: var(--text-main);
  border-color: var(--border-card);
}

.btn-secondary:hover {
  background-color: var(--bg-subtle-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:active {
  transform: scale(0.97) translateY(0);
}

/* Session Completed State (Phase 4) */
.session-completed-card {
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
  border: 1px solid #86efac;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin: 1rem 0;
  animation: fadeInSlideUp 0.35s ease-out;
}

.completed-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-align: left;
  margin-bottom: 1.15rem;
}

.completed-icon {
  font-size: 1.75rem;
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 0.45rem;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
  line-height: 1;
}

.completed-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #166534;
  margin-bottom: 0.2rem;
}

.completed-subtext {
  font-size: 0.825rem;
  color: #15803d;
  line-height: 1.4;
}

.completed-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

@keyframes fadeInSlideUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.phase-notice {
  font-size: 0.8rem;
  color: var(--text-subtle);
  text-align: center;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-light);
}

/* --------------------------------------------------------------------------
   Component 2: Daily 2-Hour Goal Card (Accessible Progressbar)
   -------------------------------------------------------------------------- */
.goal-pill {
  background-color: var(--accent-gold-bg);
  color: var(--accent-gold);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
}

.goal-stats-summary {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 1.25rem;
  margin: 1rem 0 1.5rem;
}

.stat-block {
  text-align: center;
}

.stat-number {
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  display: block;
}

.stat-unit {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-divider {
  font-size: 2rem;
  color: var(--border-card);
}

.progress-track-wrapper {
  margin-bottom: 2rem;
}

.progress-bar-rail {
  width: 100%;
  height: 14px;
  background-color: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid var(--border-card);
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #40916c 0%, #2d6a4f 100%);
  border-radius: var(--radius-full);
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.milestone-markers {
  position: relative;
  height: 20px;
  margin-top: 0.4rem;
}

.milestone-markers .marker {
  position: absolute;
  transform: translateX(-50%);
  font-size: 0.725rem;
  color: var(--text-subtle);
  font-weight: 500;
}

.goal-encouragement {
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.encouragement-text {
  font-size: 0.875rem;
  color: #166534;
  line-height: 1.5;
}

.goal-breakdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--border-card);
}

.mini-stat {
  display: flex;
  flex-direction: column;
}

.mini-label {
  font-size: 0.775rem;
  color: var(--text-muted);
}

.mini-value {
  font-size: 1.1rem;
  color: var(--text-main);
}

/* Mindful Milestones & Badges (Phase 4) */
.milestones-section {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-card);
}

.milestones-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.85rem;
}

.milestones-heading {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-main);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.milestones-summary {
  font-size: 0.725rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-subtle);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
}

.milestones-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.milestone-badge-item {
  background-color: var(--bg-app);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  opacity: 0.65;
  transition:
    transform var(--transition-normal),
    opacity var(--transition-normal),
    background-color var(--transition-normal),
    border-color var(--transition-normal),
    box-shadow var(--transition-normal);
}

.milestone-badge-item[data-unlocked="true"] {
  background-color: #f0fdf4;
  border-color: #86efac;
  opacity: 1;
  box-shadow: 0 2px 8px rgba(45, 106, 79, 0.08);
  animation: milestoneUnlock 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes milestoneUnlock {
  0% {
    transform: scale(0.97);
  }
  60% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

.milestone-icon {
  font-size: 1.35rem;
  flex-shrink: 0;
  line-height: 1;
}

.milestone-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.milestone-title {
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.milestone-badge-item[data-unlocked="true"] .milestone-title {
  color: #166534;
}

.milestone-status {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.milestone-badge-item[data-unlocked="true"] .milestone-status {
  color: #15803d;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Component 3: Phone & Mac Device Sync Placeholders (Semantic & Stackable)
   -------------------------------------------------------------------------- */
.privacy-badge {
  background-color: var(--accent-blue-bg);
  color: var(--accent-blue);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
}

.sync-dropzones {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

/* Semantically correct placeholder box: clear static affordance, not clickable */
.dropzone-box {
  background: var(--bg-app);
  border: 1px dashed var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  cursor: default;
}

.dropzone-icon {
  font-size: 1.75rem;
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  line-height: 1;
}

.dropzone-info {
  flex: 1;
  min-width: 0;
}

.dropzone-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.3rem;
}

.dropzone-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.placeholder-status-tag {
  font-size: 0.725rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.dropzone-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.sync-reassurance {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.785rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 0.5rem;
  line-height: 1.45;
}

.reassurance-icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

/* --------------------------------------------------------------------------
   Component 4: History Placeholder Card (Demo State)
   -------------------------------------------------------------------------- */
.history-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.demo-state-callout {
  background-color: var(--bg-app);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  background-color: var(--bg-app);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  gap: 0.75rem;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast);
}

.history-item:hover {
  background-color: var(--bg-surface);
  border-color: var(--primary-subtle);
  transform: translateX(2px);
}

.history-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.session-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.session-title {
  display: block;
  font-size: 0.9rem;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-meta {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.history-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.session-duration {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
}

.session-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}

.session-badge.completed {
  background-color: var(--primary-subtle);
  color: var(--primary);
}

.session-badge.break {
  background-color: var(--accent-blue-bg);
  color: var(--accent-blue);
}

.history-footer {
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border-light);
}

.history-note {
  font-size: 0.775rem;
  color: var(--text-subtle);
}

/* --------------------------------------------------------------------------
   Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  background-color: #1a202c;
  color: #ffffff;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-elevated);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: toastSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
  max-width: 360px;
}

.toast.toast-milestone {
  background: linear-gradient(135deg, #1e3a2f 0%, #2d6a4f 100%);
  border: 1px solid #52b788;
  box-shadow: 0 8px 24px rgba(45, 106, 79, 0.25);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --------------------------------------------------------------------------
   Site Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-card);
  padding: 1.5rem;
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.phase-tag {
  background: var(--bg-subtle);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}

.back-to-top {
  color: var(--primary);
  font-weight: 500;
}

.back-to-top:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .summary-metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 720px) {
  .header-container {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .main-nav .nav-list {
    overflow-x: auto;
    padding-bottom: 0.25rem;
  }

  .welcome-banner {
    flex-direction: column;
    align-items: flex-start;
  }

  .daily-badge {
    width: 100%;
  }

  .timer-time {
    font-size: 2.5rem;
  }

  .toast-container {
    left: 1.5rem;
    right: 1.5rem;
    bottom: 1.5rem;
  }
}

/* Safe Mobile Stacking for Narrow Screens (<= 560px) */
@media (max-width: 560px) {
  .summary-metrics-strip {
    grid-template-columns: 1fr;
  }

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

  .completed-actions {
    flex-direction: column;
  }

  .dropzone-box {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .dropzone-title-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .history-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .history-right {
    width: 100%;
    justify-content: space-between;
  }

  .goal-breakdown {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Interaction polish
   -------------------------------------------------------------------------- */
button {
  -webkit-tap-highlight-color: transparent;
}

button:not(:disabled) {
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    color var(--transition-fast);
}

button:not(:disabled):active {
  transform: translateY(1px) scale(0.98);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.btn {
  min-height: 44px;
  letter-spacing: 0.01em;
}

.btn:focus-visible,
.mode-btn:focus-visible,
.icon-btn:focus-visible {
  outline: 3px solid var(--accent-blue);
  outline-offset: 3px;
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-primary:active,
.btn-secondary:active {
  transform: translateY(1px) scale(0.97);
  box-shadow: none;
}

.mode-btn {
  min-height: 42px;
}

.mode-btn:hover {
  background: color-mix(in srgb, var(--bg-surface) 55%, transparent);
}

.timer-controls {
  align-items: center;
}

.timer-controls .btn-primary {
  min-width: 168px;
}

.completed-actions .btn,
.local-backup-actions .btn {
  min-width: 140px;
}

.local-backup {
  align-items: center;
  border-left: 3px solid var(--primary);
}

.local-backup-actions {
  align-items: center;
}

.card-header {
  gap: 1rem;
}

.card-header > :first-child {
  min-width: 0;
}

.summary-metric-card,
.dropzone-box,
.milestone-badge-item {
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast);
}

.summary-metric-card:hover,
.dropzone-box:not(.placeholder-box):hover,
.milestone-badge-item:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border-card));
}

.back-to-top {
  transition:
    color var(--transition-fast),
    transform var(--transition-fast);
}

.back-to-top:hover {
  transform: translateY(-1px);
}

@media (prefers-reduced-motion: reduce) {
  button:not(:disabled):active,
  .btn-primary:hover,
  .summary-metric-card:hover,
  .dropzone-box:not(.placeholder-box):hover,
  .milestone-badge-item:hover,
  .back-to-top:hover {
    transform: none;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   Phase 5: Mindful Polish & Themes
   - Dark Theme (Deep Pine & Charcoal Slate)
   - Header Controls (Sound, Notifications, Theme)
   - First-Use Onboarding Dialog
   - Weekly Activity Timeline (7-Day Focus Rhythm)
   ========================================================================== */

/* --------------------------------------------------------------------------
   Dark Theme Palette Overrides
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
  --bg-app: #111815;
  --bg-surface: #17211c;
  --bg-surface-elevated: #1f2c25;
  --bg-subtle: #212e27;
  --bg-subtle-hover: #293a31;

  --primary: #52b788;
  --primary-hover: #74c69d;
  --primary-subtle: rgba(82, 183, 136, 0.2);
  --primary-glow: rgba(82, 183, 136, 0.25);

  --accent-gold: #ecc94b;
  --accent-gold-bg: rgba(236, 201, 75, 0.16);
  --accent-blue: #63b3ed;
  --accent-blue-bg: rgba(99, 179, 237, 0.16);
  --accent-amber: #f6ad55;
  --accent-amber-bg: rgba(246, 173, 85, 0.16);

  --text-main: #f0fdf4;
  --text-muted: #9bb0a4;
  --text-subtle: #72877b;
  --border-light: #2b3b32;
  --border-card: #27362d;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.45);
  --shadow-elevated: 0 10px 32px rgba(0, 0, 0, 0.55);
}

[data-theme="dark"] .welcome-banner {
  background: linear-gradient(135deg, #17211c 0%, #1a2a22 100%);
}

[data-theme="dark"] .daily-badge {
  background: #1f2c25;
}

[data-theme="dark"] .timer-circle {
  background: radial-gradient(circle, #1a2721 0%, #151e19 100%);
  border-color: #27382f;
}

[data-theme="dark"] .progress-bar-rail,
[data-theme="dark"] .timeline-bar-rail {
  background-color: #212f27;
}

[data-theme="dark"] .device-item {
  background: #19241e;
}

/* --------------------------------------------------------------------------
   Header Right Actions & Preferences Controls
   -------------------------------------------------------------------------- */
.header-right-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.icon-btn {
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: var(--bg-subtle-hover);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.icon-btn:active {
  transform: scale(0.94);
}

.icon-btn:focus-visible,
.onboarding-card button:focus-visible {
  outline: 3px solid var(--accent-blue);
  outline-offset: 3px;
}

.icon-btn.is-active {
  background: var(--primary-subtle);
  border-color: var(--primary);
  color: var(--primary);
}

/* --------------------------------------------------------------------------
   First-Use Onboarding Dialog
   -------------------------------------------------------------------------- */
.onboarding-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 18, 14, 0.72);
  backdrop-filter: blur(5px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  animation: fadeInOverlay 0.25s ease-out;
}

.onboarding-overlay[hidden] {
  display: none !important;
}

.onboarding-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  padding: 2.25rem 2rem;
  box-shadow: var(--shadow-elevated);
  animation: slideUpCard 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.onboarding-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.onboarding-badge {
  font-size: 2.25rem;
  display: inline-block;
  margin-bottom: 0.5rem;
  background: var(--primary-subtle);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
}

.onboarding-title {
  font-size: 1.5rem;
  color: var(--text-main);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.onboarding-subtitle {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.onboarding-steps {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 1.75rem;
}

.onboarding-step {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.825rem;
  flex-shrink: 0;
}

.step-body strong {
  display: block;
  font-size: 0.925rem;
  color: var(--text-main);
  margin-bottom: 0.2rem;
}

.step-body p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin: 0;
}

.onboarding-footer {
  text-align: center;
}

.onboarding-footer .btn {
  width: 100%;
  justify-content: center;
  padding: 0.85rem;
  font-size: 1rem;
}

@keyframes fadeInOverlay {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUpCard {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --------------------------------------------------------------------------
   Weekly Activity Timeline Card (7-Day Focus Rhythm)
   -------------------------------------------------------------------------- */
.timeline-card {
  grid-column: 1 / -1;
}

.local-backup {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.25rem;
  padding: 1rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
}

.local-backup-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .local-backup {
    align-items: stretch;
    flex-direction: column;
  }

  .local-backup-actions .btn {
    flex: 1;
  }
}

.feedback-card {
  grid-column: 1 / -1;
}

.feedback-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feedback-feeling {
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.feedback-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.feedback-option {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text-main);
  font-size: 0.95rem;
}

.feedback-form textarea {
  width: 100%;
  resize: vertical;
  min-height: 6rem;
  font-family: inherit;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-main);
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 0.8rem 0.9rem;
}

.feedback-form textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.feedback-hint {
  font-size: 0.85rem;
  color: var(--text-subtle);
}

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.timeline-summary-badge {
  font-size: 0.775rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  background: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid rgba(45, 106, 79, 0.2);
}

[data-theme="dark"] .timeline-summary-badge {
  border-color: rgba(82, 183, 136, 0.3);
}

.timeline-chart-container {
  margin: 1.25rem 0 1.5rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.25rem 1rem;
}

.timeline-bars {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.85rem;
  align-items: flex-end;
  height: 170px;
}

.timeline-bar-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
  gap: 0.4rem;
}

.timeline-bar-val {
  font-size: 0.725rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
  min-height: 1rem;
  white-space: nowrap;
}

.timeline-bar-rail {
  width: 100%;
  max-width: 42px;
  height: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  position: relative;
}

.timeline-bar-fill {
  width: 100%;
  background: linear-gradient(180deg, #52b788 0%, #2d6a4f 100%);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
  transition: height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  min-height: 0px;
}

.timeline-bar-column.is-today .timeline-bar-fill {
  background: linear-gradient(180deg, #74c69d 0%, #2d6a4f 100%);
  box-shadow: 0 0 10px rgba(82, 183, 136, 0.45);
}

.timeline-bar-day {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 0.25rem;
}

.timeline-bar-column.is-today .timeline-bar-day {
  color: var(--primary);
  font-weight: 700;
}

.timeline-bar-column.is-today .timeline-bar-rail {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary-subtle);
}

.timeline-footer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border-light);
}

.timeline-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.timeline-stat-label {
  font-size: 0.75rem;
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.timeline-stat-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

@media (max-width: 560px) {
  .timeline-bars {
    gap: 0.4rem;
  }

  .timeline-bar-val {
    font-size: 0.65rem;
  }

  .timeline-bar-day {
    font-size: 0.68rem;
  }

  .timeline-footer {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .header-right-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}

/* --------------------------------------------------------------------------
   Professional SaaS refinement
   -------------------------------------------------------------------------- */
:root {
  --bg-app: #f5f7f6;
  --bg-surface: #ffffff;
  --bg-subtle: #f0f5f1;
  --bg-subtle-hover: #e6efe8;
  --border-card: #dfe8e1;
  --shadow-card: 0 8px 24px rgba(29, 67, 48, 0.055);
  --shadow-elevated: 0 14px 34px rgba(29, 67, 48, 0.09);
  --transition-fast: 0.16s ease;
  --transition-normal: 0.22s ease;
}

body {
  background:
    radial-gradient(circle at 8% 0%, rgba(216, 243, 220, 0.34), transparent 28rem),
    var(--bg-app);
}

.site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom-color: rgba(223, 232, 225, 0.9);
}

.header-container {
  min-height: 72px;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.brand {
  min-width: 210px;
}

.brand-icon {
  border: 1px solid rgba(45, 106, 79, 0.12);
  box-shadow: 0 4px 12px rgba(45, 106, 79, 0.08);
}

.main-nav .nav-list {
  gap: 0.2rem;
}

.nav-link {
  font-size: 0.875rem;
  padding: 0.5rem 0.7rem;
}

.main-layout {
  padding-top: 1.5rem;
}

.welcome-banner {
  min-height: 190px;
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.25rem;
  background: linear-gradient(110deg, #ffffff 0%, #f0f8f2 100%);
  box-shadow: var(--shadow-card);
}

.welcome-title {
  font-size: clamp(1.35rem, 2.3vw, 1.8rem);
  letter-spacing: -0.025em;
}

.welcome-message {
  max-width: 560px;
  font-size: 0.95rem;
}

.daily-badge {
  min-width: 250px;
  box-shadow: none;
}

.summary-metrics-strip {
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.summary-metric-card {
  min-height: 104px;
  padding: 1rem;
  gap: 0.8rem;
}

.summary-metric-icon {
  font-size: 1.45rem;
  padding: 0.45rem;
}

.summary-metric-value {
  font-size: 1.3rem;
}

.dashboard-grid {
  gap: 1.25rem;
}

.card {
  padding: 1.4rem;
  border-radius: 16px;
}

.card-header {
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.15rem;
  letter-spacing: -0.015em;
}

.timer-mode-selector {
  margin-bottom: 1.1rem;
}

.timer-display-container {
  margin: 0.75rem 0 1.1rem;
}

.timer-controls {
  margin-bottom: 0.75rem;
}

.btn {
  border-radius: 10px;
  font-size: 0.875rem;
  padding: 0.65rem 1.1rem;
}

.btn-primary {
  box-shadow: 0 5px 14px var(--primary-glow);
}

.local-backup {
  margin-top: 1rem;
  padding: 0.9rem;
}

.timeline-chart-container {
  margin-top: 1rem;
}

.focus-duration-control {
  display: grid;
  gap: 0.35rem;
  margin: -0.5rem 0 1rem;
  padding: 0.75rem 0.85rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
}

.daily-goal-control {
  display: grid;
  gap: 0.35rem;
  margin: 1rem 0;
  padding: 0.75rem 0.85rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
}

.daily-goal-control label {
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 700;
}

.daily-goal-fields {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#dailyGoalInput {
  width: 5.25rem;
  min-height: 40px;
  padding: 0.5rem 0.65rem;
  color: var(--text-main);
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
}

.daily-goal-fields > span,
.daily-goal-hint {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.daily-goal-hint {
  font-size: 0.75rem;
}

.focus-duration-control label {
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 700;
}

.focus-duration-fields {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#focusDurationInput {
  width: 5.25rem;
  min-height: 40px;
  padding: 0.5rem 0.65rem;
  color: var(--text-main);
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
}

.focus-duration-fields > span {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.focus-duration-hint {
  color: var(--text-subtle);
  font-size: 0.75rem;
}

@media (max-width: 560px) {
  .focus-duration-fields {
    align-items: stretch;
  }

  .focus-duration-fields .btn {
    margin-left: auto;
  }
}

@media (max-width: 960px) {
  .brand {
    min-width: auto;
  }
}

@media (max-width: 720px) {
  .header-container {
    min-height: auto;
  }

  .main-layout {
    padding-top: 1rem;
  }

  .welcome-banner {
    min-height: auto;
    padding: 1.25rem;
  }

  .daily-badge {
    min-width: 0;
  }

  .main-nav {
    width: 100%;
  }

  .main-nav .nav-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .nav-link {
    text-align: center;
    padding-inline: 0.45rem;
  }

  .timer-card,
  .goal-card,
  .task-card,
  .timeline-card,
  .sync-card,
  .history-card {
    min-height: auto;
  }

  .task-form {
    grid-template-columns: 1fr 5.5rem;
  }

  .task-form .btn {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header {
    backdrop-filter: none;
  }
}

/* Consistent interaction language for every native button */
button:not(:disabled) {
  will-change: transform;
}

button:not(:disabled):hover {
  transform: translateY(-1px);
}

button:not(:disabled):active {
  transform: translateY(1px) scale(0.98);
}

button:disabled {
  pointer-events: none;
}

.settings-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: rgba(15, 23, 42, 0.42);
  backdrop-filter: blur(8px);
}

.settings-overlay[hidden] { display: none; }

.settings-card {
  width: min(100%, 38rem);
  padding: 1.5rem;
  border: 1px solid var(--border-card);
  border-radius: 1.5rem;
  background: var(--bg-surface);
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.2);
}

.settings-header, .settings-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.settings-grid label, .settings-toggle {
  display: grid;
  gap: .45rem;
  color: var(--text-muted);
  font-size: .85rem;
  font-weight: 700;
}

.settings-grid input {
  width: 100%;
  padding: .75rem .8rem;
  border: 1px solid var(--border-light);
  border-radius: .8rem;
  background: var(--bg-app);
  color: var(--text-main);
  font: inherit;
}

.preset-section {
  margin: 0 0 1.25rem;
}

.settings-label {
  display: block;
  margin-bottom: .55rem;
  color: var(--text-muted);
  font-size: .85rem;
  font-weight: 700;
}

.preset-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .6rem;
}

.preset-btn {
  display: grid;
  gap: .25rem;
  padding: .7rem .65rem;
  border: 1px solid var(--border-card);
  border-radius: .8rem;
  background: var(--bg-subtle);
  color: var(--text-main);
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: all var(--transition-fast);
}

.preset-btn span {
  color: var(--text-muted);
  font-size: .72rem;
}

.preset-btn:hover,
.preset-btn.is-selected {
  border-color: var(--primary);
  background: var(--primary-subtle);
  transform: translateY(-1px);
}

.settings-toggle {
  display: flex;
  align-items: center;
}

.settings-note {
  margin: 1rem 0 1.5rem;
  color: var(--text-muted);
  font-size: .85rem;
}

@media (max-width: 560px) {
  .settings-grid { grid-template-columns: 1fr; }
  .preset-list { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  button:not(:disabled):hover,
  button:not(:disabled):active {
    transform: none;
  }
}

.focus-insights {
  margin-top: 1.5rem;
  padding-top: 1.35rem;
  border-top: 1px solid var(--border-card);
}

.insights-heading-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.insights-title {
  margin: .2rem 0 0;
  color: var(--text-main);
  font-size: 1.05rem;
}

.insights-caption {
  color: var(--text-subtle);
  font-size: .78rem;
}

.insights-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .7rem;
}

.insight-stat {
  padding: .85rem;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
}

.insight-label {
  display: block;
  margin-bottom: .35rem;
  color: var(--text-muted);
  font-size: .72rem;
  font-weight: 700;
}

.insight-stat strong {
  display: block;
  overflow: hidden;
  color: var(--text-main);
  font-size: 1rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.insights-message {
  margin: 1rem 0 0;
  color: var(--text-muted);
  font-size: .85rem;
}

@media (max-width: 720px) {
  .insights-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .insights-heading-row { align-items: flex-start; flex-direction: column; gap: .35rem; }
}