/* ─── Variables ────────────────────────────────────────────── */
:root {
  --c-primary: #0ea5e9;
  --c-primary-dk: #0284c7;
  --c-primary-lt: #e0f2fe;
  --c-rotate: #22c55e;
  --c-rotate-dk: #16a34a;
  --c-overdue: #f97316;
  --c-overdue-lt: #fff7ed;
  --c-overdue-dk: #c2410c;
  --c-danger: #ef4444;
  --c-danger-dk: #dc2626;
  --c-bg: #f0f9ff;
  --c-card: #ffffff;
  --c-text: #0f172a;
  --c-text-2: #475569;
  --c-text-3: #94a3b8;
  --c-border: #e2e8f0;
  --c-nav-bg: #ffffff;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --shadow: 0 1px 4px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1), 0 12px 36px rgba(0, 0, 0, 0.1);

  --nav-h: 64px;
  --top-bar-h: 56px;
}

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

html,
body {
  height: 100%;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
  color: inherit;
}
input {
  font: inherit;
  color: inherit;
}
img {
  display: block;
}

/* ─── App Shell ─────────────────────────────────────────────── */
#app {
  height: 100dvh;
  height: 100vh;
  overflow: hidden;
}

/* ─── Views ─────────────────────────────────────────────────── */
.view {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
}

.view.hidden {
  display: none;
}

/* ─── Top Bar ───────────────────────────────────────────────── */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--top-bar-h);
  padding: 0 20px;
  background: var(--c-card);
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
}

.top-title {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.2px;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  color: var(--c-text-2);
  transition: background 0.15s;
}
.icon-btn:hover {
  background: var(--c-primary-lt);
  color: var(--c-primary);
}
.icon-btn:active {
  background: var(--c-border);
}

/* ─── Scrollable content ────────────────────────────────────── */
.scroll-content {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px 16px calc(var(--nav-h) + 20px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ─── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--c-card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* Aligner card */
.card-aligner {
}

.aligner-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.aligner-badge {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.aligner-num {
  font-size: 28px;
  font-weight: 700;
  color: white;
  line-height: 1;
}

.aligner-meta {
  flex: 1;
}

.aligner-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--c-text-3);
  margin-bottom: 2px;
}

.aligner-fraction {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-text);
}

.progress-track {
  height: 8px;
  background: var(--c-border);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 6px;
}

.progress-fill {
  height: 100%;
  background: var(--c-primary);
  border-radius: 99px;
  transition: width 0.4s ease;
  width: 0%;
}

.progress-label {
  font-size: 12px;
  color: var(--c-text-3);
  text-align: right;
}

/* Countdown card */
.card-countdown {
  text-align: center;
  padding: 24px 20px;
}

.card-countdown.overdue {
  background: var(--c-overdue-lt);
  border: 1.5px solid #fed7aa;
}

.countdown-top {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--c-text-3);
  margin-bottom: 6px;
}

.card-countdown.overdue .countdown-top {
  color: var(--c-overdue);
}

.countdown-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--c-primary);
  line-height: 1.1;
  letter-spacing: -0.5px;
}

.card-countdown.overdue .countdown-value {
  color: var(--c-overdue-dk);
}

.countdown-date {
  font-size: 13px;
  color: var(--c-text-3);
  margin-top: 4px;
}

.card-countdown.overdue .countdown-date {
  color: var(--c-overdue);
}

/* Remaining card */
.card-remaining {
}

.remaining-cols {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

.remaining-col {
  flex: 1;
  text-align: center;
}

.remaining-divider {
  width: 1px;
  height: 44px;
  background: var(--c-border);
}

.remaining-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.1;
}

.remaining-label {
  font-size: 12px;
  color: var(--c-text-3);
  margin-top: 2px;
}

.est-end {
  font-size: 13px;
  color: var(--c-text-2);
  text-align: center;
  padding-top: 8px;
  border-top: 1px solid var(--c-border);
}

/* ─── Action Buttons ────────────────────────────────────────── */
.actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition:
    background 0.15s,
    transform 0.1s,
    box-shadow 0.15s;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

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

.btn-full {
  width: 100%;
}

.btn-primary {
  background: var(--c-primary);
  color: white;
}
.btn-primary:hover {
  background: var(--c-primary-dk);
}
.btn-primary:active {
  background: var(--c-primary-dk);
}

.btn-ghost {
  background: transparent;
  color: var(--c-text-2);
  border: 1.5px solid var(--c-border);
}
.btn-ghost:hover {
  background: var(--c-bg);
}

.btn-danger {
  background: var(--c-danger);
  color: white;
}
.btn-danger:hover {
  background: var(--c-danger-dk);
}
.btn-danger:active {
  background: var(--c-danger-dk);
}

.btn-cal {
  background: var(--c-primary-lt);
  color: var(--c-primary-dk);
  border: 1.5px solid #bae6fd;
}
.btn-cal:hover {
  background: #bae6fd;
}

.btn-rotate {
  background: var(--c-rotate);
  color: white;
  padding: 20px;
  font-size: 17px;
  font-weight: 700;
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgba(34, 197, 94, 0.35);
  width: 100%;
  letter-spacing: -0.1px;
}
.btn-rotate:hover {
  background: var(--c-rotate-dk);
  box-shadow: 0 4px 18px rgba(34, 197, 94, 0.45);
}
.btn-rotate:active {
  background: var(--c-rotate-dk);
  transform: scale(0.98);
}
.btn-rotate:disabled {
  background: var(--c-border);
  color: var(--c-text-3);
  box-shadow: none;
  cursor: default;
}
.btn-rotate:disabled:active {
  transform: none;
}

/* ─── Bottom Navigation ─────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: var(--c-nav-bg);
  border-top: 1px solid var(--c-border);
  display: flex;
  align-items: stretch;
  padding-bottom: env(safe-area-inset-bottom, 0);
  z-index: 100;
}

.bottom-nav.hidden {
  display: none;
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--c-text-3);
  font-size: 11px;
  font-weight: 500;
  transition: color 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.nav-item span {
  line-height: 1;
}

.nav-item.active {
  color: var(--c-primary);
}

.nav-item svg {
  transition: stroke 0.15s;
}

/* ─── Forms ─────────────────────────────────────────────────── */
.form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text-2);
}

input[type='number'],
input[type='date'] {
  padding: 12px 14px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 16px;
  background: white;
  outline: none;
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
  appearance: none;
  -webkit-appearance: none;
}

input[type='number']:focus,
input[type='date']:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

input.invalid {
  border-color: var(--c-danger);
}

/* ─── Setup View ────────────────────────────────────────────── */
.view[data-view='setup'] {
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.setup-content {
  padding: 48px 24px 40px;
  max-width: 420px;
  margin: 0 auto;
  width: 100%;
}

.setup-logo {
  margin-bottom: 20px;
}

.setup-logo img {
  border-radius: 18px;
}

h1 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.setup-sub {
  font-size: 15px;
  color: var(--c-text-2);
  margin-bottom: 28px;
}

/* ─── History View ──────────────────────────────────────────── */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--c-card);
  border-bottom: 1px solid var(--c-border);
}

.history-item:first-child {
  border-radius: var(--radius) var(--radius) 0 0;
}

.history-item:last-child {
  border-radius: 0 0 var(--radius) var(--radius);
  border-bottom: none;
}

.history-item:only-child {
  border-radius: var(--radius);
}

.history-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--c-primary-lt);
  color: var(--c-primary-dk);
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.history-badge.current {
  background: var(--c-primary);
  color: white;
}

.history-info {
  flex: 1;
}

.history-aligner {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
}

.history-date {
  font-size: 12px;
  color: var(--c-text-3);
  margin-top: 1px;
}

.history-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}

.history-duration {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-text-2);
  text-align: right;
}

.history-edit {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  color: var(--c-text-3);
  transition:
    background 0.15s,
    color 0.15s;
}

.history-edit:hover {
  background: var(--c-primary-lt);
  color: var(--c-primary);
}

.history-series-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 99px;
  background: var(--c-primary-lt);
  color: var(--c-primary-dk);
  margin-left: 5px;
  vertical-align: middle;
  letter-spacing: 0.2px;
}

.empty-msg {
  text-align: center;
  color: var(--c-text-3);
  font-size: 14px;
  padding: 48px 24px;
  line-height: 1.6;
}

/* ─── Settings View ─────────────────────────────────────────── */
.view[data-view='settings'] .scroll-content {
  padding-top: 20px;
}

.danger-zone {
  margin-top: 32px;
  padding: 20px;
  background: var(--c-card);
  border-radius: var(--radius);
  border: 1.5px solid #fecaca;
}

.github-link {
  align-self: flex-end;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--c-text-3);
  text-decoration: none;
  opacity: 0.6;
  padding: 4px 2px;
  transition: opacity 0.15s;
}

.github-link:hover {
  opacity: 1;
}

.danger-zone h3 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--c-danger);
  margin-bottom: 14px;
}

/* ─── Modal ─────────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: flex-end;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
}

.modal-box {
  position: relative;
  background: var(--c-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  padding: 28px 24px calc(28px + env(safe-area-inset-bottom, 0));
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.modal-box h2 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.modal-box p {
  font-size: 15px;
  color: var(--c-text-2);
  margin-bottom: 24px;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
}

.modal-actions .btn {
  flex: 1;
}

/* ─── Toast ─────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: calc(var(--nav-h) + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: #1e293b;
  color: white;
  padding: 10px 18px;
  border-radius: 99px;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition:
    opacity 0.2s,
    transform 0.2s;
  z-index: 300;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ─── Utility ───────────────────────────────────────────────── */
.hidden {
  display: none !important;
}

/* ─── Top bar subtitle (series name) ───────────────────────── */
.top-bar-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
}

.top-sub {
  font-size: 11px;
  color: var(--c-text-3);
  font-weight: 500;
  line-height: 1;
  min-height: 11px;
}

/* ─── Section labels ────────────────────────────────────────── */
.section-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--c-text-3);
  padding: 8px 4px 2px;
}

/* ─── Series list ───────────────────────────────────────────── */
.series-list {
  display: flex;
  flex-direction: column;
  margin-bottom: 10px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.series-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 16px;
  background: var(--c-card);
  border-bottom: 1px solid var(--c-border);
}

.series-item:last-child {
  border-bottom: none;
}

.series-item.series-active {
  background: var(--c-primary-lt);
}

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

.series-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.series-desc {
  font-size: 12px;
  color: var(--c-text-3);
  margin-top: 1px;
}

.series-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.series-tag {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--c-primary);
  padding: 3px 8px;
  border-radius: 99px;
  border: 1.5px solid var(--c-primary);
}

.btn-sm {
  font-size: 12px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 8px;
  border: 1.5px solid var(--c-border);
  color: var(--c-text-2);
  transition: background 0.15s;
}

.btn-sm:hover {
  background: var(--c-bg);
}

.series-del {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  color: var(--c-text-3);
  transition:
    background 0.15s,
    color 0.15s;
}

.series-del:hover {
  background: #fee2e2;
  color: var(--c-danger);
}

/* ─── Data card (export/import) ─────────────────────────────── */
.data-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: var(--c-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ─── Settings card wrapper ─────────────────────────────────── */
.view[data-view='settings'] .card {
  padding: 20px;
  margin-bottom: 0;
}

/* ─── Dark Mode ─────────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --c-primary-lt: #082f49;
    --c-overdue-lt: #431407;
    --c-bg: #0f172a;
    --c-card: #1e293b;
    --c-text: #f1f5f9;
    --c-text-2: #94a3b8;
    --c-text-3: #475569;
    --c-border: #334155;
    --c-nav-bg: #1e293b;
    --shadow: 0 1px 0 rgba(255, 255, 255, 0.04), 0 4px 12px rgba(0, 0, 0, 0.3);
  }

  input[type='number'],
  input[type='date'] {
    background: #0f172a;
    color-scheme: dark;
  }

  .card-countdown.overdue {
    border-color: #7c2d12;
  }

  .btn-cal {
    border-color: #0369a1;
  }

  .btn-cal:hover {
    background: #075985;
  }

  .danger-zone {
    border-color: #7f1d1d;
  }

  .toast {
    background: #475569;
  }
}

/* ─── Desktop layout (3-column side-by-side) ────────────────── */
@media (min-width: 900px) {
  #app {
    display: flex;
    flex-direction: row;
    position: relative;
  }

  /* All 3 main views always visible, ignoring JS hide/show */
  #view-home,
  #view-history,
  #view-settings {
    display: flex !important;
    position: static;
    flex: 1;
    min-width: 0;
    border-right: 1px solid var(--c-border);
  }

  #view-settings {
    border-right: none;
  }

  /* Setup stays as a full-screen overlay */
  #view-setup {
    position: absolute;
    inset: 0;
  }

  .bottom-nav {
    display: none !important;
  }

  .scroll-content {
    padding-bottom: 20px;
  }

  /* Center modal as a dialog instead of a bottom sheet */
  .modal {
    align-items: center;
    padding: 24px;
  }

  .modal-box {
    border-radius: var(--radius-lg);
  }

  .toast {
    bottom: 24px;
  }
}