:root {
  --bg-top: #ecf6ff;
  --bg-bottom: #dbe9f7;
  --card: rgba(248, 252, 255, 0.78);
  --card-strong: rgba(255, 255, 255, 0.9);
  --text: #0f2238;
  --muted: #62748a;
  --line: rgba(93, 130, 166, 0.18);
  --accent: #24a8ff;
  --accent-deep: #1363d7;
  --accent-soft: rgba(36, 168, 255, 0.14);
  --success: #26b67a;
  --shadow: 0 24px 60px rgba(29, 74, 118, 0.14);
  --grid: rgba(104, 160, 208, 0.12);
  --backdrop: rgba(11, 31, 48, 0.3);
  --input-bg: rgba(255, 255, 255, 0.9);
  --chip-bg: rgba(255, 255, 255, 0.58);
  --chip-active-text: #ffffff;
}

body.theme-dark {
  --bg-top: #071726;
  --bg-bottom: #0d2238;
  --card: rgba(10, 24, 39, 0.74);
  --card-strong: rgba(12, 31, 50, 0.92);
  --text: #eef7ff;
  --muted: #94acc3;
  --line: rgba(113, 170, 214, 0.18);
  --accent: #4ac7ff;
  --accent-deep: #1c7cf2;
  --accent-soft: rgba(74, 199, 255, 0.14);
  --success: #39d59a;
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.34);
  --grid: rgba(74, 199, 255, 0.08);
  --backdrop: rgba(2, 9, 16, 0.68);
  --input-bg: rgba(8, 23, 37, 0.95);
  --chip-bg: rgba(13, 32, 52, 0.8);
  --chip-active-text: #071726;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(74, 199, 255, 0.22), transparent 28%),
    radial-gradient(circle at bottom right, rgba(27, 111, 224, 0.18), transparent 25%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  transition: background 220ms ease, color 220ms ease;
}

.bg-orb,
.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.bg-orb {
  filter: blur(18px);
  opacity: 0.75;
}

.orb-1 {
  inset: 5% auto auto -8%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(78, 190, 255, 0.3) 0%, rgba(78, 190, 255, 0) 72%);
}

.orb-2 {
  inset: auto -6% 8% auto;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 116, 223, 0.22) 0%, rgba(26, 116, 223, 0) 72%);
}

.bg-grid {
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.42), transparent 85%);
}

.app-shell {
  width: min(100%, 540px);
  margin: 0 auto;
  padding: 24px 16px 32px;
  position: relative;
  z-index: 1;
}

.hidden {
  display: none;
}

.hero-card,
.stats-card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 30px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px);
}

.hero-card {
  padding: 24px;
}

.stats-card {
  margin-top: 16px;
  padding: 20px;
}

.eyebrow,
.section-label,
.timer-label,
.session-list-title,
.timer-status,
.sync-status,
.stats-pill,
.empty-state,
.field-label {
  letter-spacing: 0.02em;
}

.eyebrow,
.section-label,
.timer-label,
.session-list-title {
  margin: 0;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--muted);
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  margin-top: 16px;
  font-size: 46px;
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.subtitle {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.5;
  max-width: 32ch;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.theme-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: var(--chip-bg);
  border: 1px solid var(--line);
}

.theme-chip {
  min-width: 58px;
  padding: 7px 10px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
  background: transparent;
  box-shadow: none;
}

.theme-chip.active {
  color: var(--chip-active-text);
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  box-shadow: 0 10px 20px rgba(19, 99, 215, 0.22);
}

.timer-block {
  margin-top: 24px;
  padding: 20px;
  border-radius: 26px;
  background: var(--card-strong);
  border: 1px solid var(--line);
}

.timer-value {
  margin-top: 10px;
  font-size: 48px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.05em;
}

.timer-status {
  margin-top: 12px;
  color: var(--muted);
}

.sync-status {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
}

.timer-status.active {
  color: var(--success);
}

.sync-status.ready {
  color: var(--success);
}

.sync-status.error {
  color: #9a3d2a;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}

button {
  appearance: none;
  border: 0;
  border-radius: 20px;
  padding: 16px 18px;
  font: inherit;
  font-size: 16px;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease, box-shadow 120ms ease;
}

button:active {
  transform: translateY(1px);
}

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

.primary-btn {
  color: #f8fcff;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  box-shadow: 0 14px 28px rgba(19, 99, 215, 0.28);
}

.secondary-btn {
  color: var(--text);
  background: var(--accent-soft);
}

.stats-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

h2 {
  margin-top: 6px;
  font-size: 34px;
}

.stats-pill {
  padding: 10px 12px;
  border-radius: 999px;
  background: var(--card-strong);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

.view-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 18px;
  padding: 6px;
  border-radius: 999px;
  background: var(--chip-bg);
  border: 1px solid var(--line);
}

.view-chip {
  min-width: 88px;
  padding: 9px 12px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  background: transparent;
  box-shadow: none;
}

.view-chip.active {
  color: var(--chip-active-text);
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  box-shadow: 0 10px 20px rgba(19, 99, 215, 0.22);
}

.session-list-wrap {
  margin-top: 20px;
}

.session-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 14px 0 0;
  list-style: none;
}

.session-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 14px 16px;
  border-radius: 18px;
  background: var(--card-strong);
  border: 1px solid var(--line);
}

.session-meta {
  color: var(--muted);
  font-size: 14px;
  margin-top: 6px;
}

.session-duration {
  font-variant-numeric: tabular-nums;
  font-size: 16px;
}

.empty-state {
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.4;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: end center;
  padding: 16px;
  background: var(--backdrop);
  overflow-y: auto;
  z-index: 20;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  width: min(100%, 540px);
  padding: 20px;
  border-radius: 26px;
  background: var(--card-strong);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  max-height: min(88vh, 760px);
  overflow-y: auto;
  padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px));
}

.modal-title {
  margin-top: 8px;
  font-size: 30px;
  line-height: 1.02;
}

.modal-subtitle {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.45;
}

.field-label {
  display: block;
  margin-top: 18px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--muted);
}

.report-input {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  font: inherit;
  font-size: 16px;
  color: var(--text);
  background: var(--input-bg);
}

.text-input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px 16px;
  font: inherit;
  font-size: 16px;
  color: var(--text);
  background: var(--input-bg);
}

.report-input:focus,
.text-input:focus {
  outline: 2px solid rgba(217, 107, 43, 0.24);
  border-color: rgba(217, 107, 43, 0.45);
}

.modal-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
  position: sticky;
  bottom: 0;
  padding-top: 12px;
  padding-bottom: 4px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08) 0%, var(--card-strong) 24%);
}

@media (max-width: 480px) {
  .app-shell {
    padding: 16px 12px 24px;
  }

  .hero-card,
  .stats-card {
    border-radius: 24px;
  }

  .hero-card {
    padding: 20px;
  }

  h1 {
    font-size: 38px;
  }

  .timer-value {
    font-size: 40px;
  }

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

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

  .modal-backdrop {
    padding: 10px;
    align-items: end;
  }

  .modal-card {
    width: 100%;
    max-height: 92vh;
    padding: 18px;
    border-radius: 22px 22px 0 0;
  }

  .modal-actions {
    grid-template-columns: 1fr;
  }

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

  .theme-switch {
    width: 100%;
  }

  .theme-chip {
    min-width: 0;
  }

  .view-switch {
    width: 100%;
  }

  .view-chip {
    min-width: 0;
  }
}