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

:root {
  --bg:          #0a0a14;
  --bg2:         #12121f;
  --card:        #1a1a2e;
  --card2:       #1f1f38;
  --accent:      #7c6fff;
  --accent-l:    #a594ff;
  --accent-glow: rgba(124,111,255,.25);
  --cyan:        #00d4ff;
  --green:       #00e676;
  --yellow:      #ffd54f;
  --red:         #ff5252;
  --t1:          #e8e8f0;
  --t2:          #8888a8;
  --t3:          #55556a;
  --border:      rgba(255,255,255,.07);
  --nav-h:       64px;
  --radius:      16px;
  --radius-sm:   10px;
}

html { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--t1);
  min-height: 100%;
  overflow-x: hidden;
}

/* ── Layout ────────────────────────────────────────── */
#app { display: flex; flex-direction: column; min-height: 100dvh; }

.page {
  display: none;
  flex: 1;
  padding: 0 16px calc(var(--nav-h) + 16px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.page.active { display: block; }

/* ── Bottom Nav ────────────────────────────────────── */
nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: var(--bg2);
  border-top: 1px solid var(--border);
  display: flex;
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: none;
  border: none;
  color: var(--t3);
  cursor: pointer;
  transition: color .2s;
  font-size: 10px;
  letter-spacing: .3px;
  padding: 8px 0;
}
.nav-btn svg { width: 22px; height: 22px; transition: transform .2s; }
.nav-btn.active { color: var(--accent-l); }
.nav-btn.active svg { transform: scale(1.1); }

/* ── Page Headers ──────────────────────────────────── */
.page-header {
  padding: 20px 0 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.page-header h1 { font-size: 22px; font-weight: 700; }
.page-header span { font-size: 13px; color: var(--t2); }

/* ── Cards ─────────────────────────────────────────── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
}
.card + .card { margin-top: 12px; }
.card-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--t2);
  margin-bottom: 12px;
}

/* ── Stats Grid ────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}
.stat-card {
  background: var(--card2);
  border-radius: var(--radius-sm);
  padding: 14px;
  border: 1px solid var(--border);
}
.stat-label { font-size: 11px; color: var(--t2); margin-bottom: 4px; }
.stat-value { font-size: 22px; font-weight: 700; line-height: 1.1; }
.stat-sub   { font-size: 11px; color: var(--t2); margin-top: 2px; }
.stat-value.accent { color: var(--accent-l); }
.stat-value.cyan   { color: var(--cyan); }
.stat-value.green  { color: var(--green); }
.stat-value.yellow { color: var(--yellow); }

/* ── Sleep Score Ring ──────────────────────────────── */
.score-ring-wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 8px 0;
}
.score-ring {
  position: relative;
  width: 90px;
  height: 90px;
  flex-shrink: 0;
}
.score-ring svg { transform: rotate(-90deg); }
.score-ring-text {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.score-ring-text .score-num { font-size: 26px; font-weight: 800; color: var(--accent-l); }
.score-ring-text .score-lbl { font-size: 10px; color: var(--t2); }
.score-meta { flex: 1; }
.score-meta .big-time { font-size: 32px; font-weight: 800; color: var(--t1); }
.score-meta .big-time span { font-size: 16px; font-weight: 400; color: var(--t2); }
.score-meta .time-range { font-size: 13px; color: var(--t2); margin-top: 2px; }

/* ── Sleep Stage Bar ───────────────────────────────── */
.stage-bar {
  display: flex;
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
  margin: 10px 0 6px;
}
.stage-bar-deep  { background: var(--accent); }
.stage-bar-light { background: var(--cyan); opacity: .7; }
.stage-bar-rem   { background: var(--yellow); opacity: .8; }
.stage-bar-awake { background: var(--t3); }
.stage-legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.stage-dot {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--t2);
}
.stage-dot i {
  width: 8px; height: 8px;
  border-radius: 2px;
  display: inline-block;
  flex-shrink: 0;
}
.dot-deep  { background: var(--accent); }
.dot-light { background: var(--cyan); opacity: .7; }
.dot-rem   { background: var(--yellow); opacity: .8; }
.dot-awake { background: var(--t3); }

/* ── Recent List ───────────────────────────────────── */
.sleep-list { display: flex; flex-direction: column; gap: 8px; }
.sleep-item {
  background: var(--card2);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background .15s;
}
.sleep-item:active { background: var(--card); }
.sleep-item-date { font-size: 13px; color: var(--t2); min-width: 64px; }
.sleep-item-times { flex: 1; }
.sleep-item-times .times { font-size: 15px; font-weight: 600; }
.sleep-item-times .dur   { font-size: 12px; color: var(--t2); }
.sleep-item-score {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-l);
  min-width: 36px;
  text-align: right;
}
.sleep-item-edit,
.sleep-item-del {
  background: none;
  border: none;
  color: var(--t3);
  cursor: pointer;
  padding: 4px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  transition: color .15s;
}
.sleep-item-edit:hover { color: var(--accent-l); }
.sleep-item-del:hover  { color: var(--red); }

/* ── Upload Area ───────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  background: var(--card);
  position: relative;
}
.upload-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.upload-zone input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.upload-icon { font-size: 48px; margin-bottom: 12px; }
.upload-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.upload-sub   { font-size: 13px; color: var(--t2); }

/* ── Extraction Result ─────────────────────────────── */
.extract-result {
  display: none;
  margin-top: 12px;
}
.extract-result.show { display: block; }

.extract-preview {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid var(--border);
}

.extract-fields { display: flex; flex-direction: column; gap: 10px; }
.field-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.field-row label { font-size: 12px; color: var(--t2); min-width: 80px; }
.field-input {
  flex: 1;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--t1);
  font-size: 14px;
  outline: none;
  transition: border-color .2s;
}
.field-input:focus { border-color: var(--accent); }

/* ── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: opacity .2s, transform .1s;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
  margin-top: 14px;
}
.btn-primary:disabled { opacity: .45; cursor: not-allowed; }
.btn-secondary {
  background: var(--card2);
  color: var(--t1);
  border: 1px solid var(--border);
}
.btn-danger  { background: rgba(255,82,82,.15); color: var(--red); border: 1px solid rgba(255,82,82,.25); }
.btn-sm { padding: 8px 14px; font-size: 13px; }

/* ── Loading Spinner ───────────────────────────────── */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Chart Section ─────────────────────────────────── */
.chart-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  background: var(--card);
  padding: 4px;
  border-radius: var(--radius-sm);
}
.chart-tab {
  flex: 1;
  padding: 8px;
  border: none;
  background: none;
  color: var(--t2);
  font-size: 13px;
  font-weight: 600;
  border-radius: 7px;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.chart-tab.active {
  background: var(--accent);
  color: #fff;
}

.chart-type-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}
.chart-type-tab {
  padding: 6px 14px;
  border: 1px solid var(--border);
  background: none;
  color: var(--t2);
  font-size: 12px;
  font-weight: 600;
  border-radius: 20px;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.chart-type-tab.active { border-color: var(--accent-l); color: var(--accent-l); }

.chart-wrap {
  position: relative;
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
}
#chart-wrapper { width: 100%; }

.chart-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.chart-nav-label { font-size: 14px; font-weight: 600; color: var(--t1); }
.chart-nav-btn {
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--t2);
  width: 32px; height: 32px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .15s;
}
.chart-nav-btn:hover { color: var(--t1); }

.chart-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 12px;
}
.chart-summary-item { text-align: center; }
.chart-summary-item .val { font-size: 18px; font-weight: 700; color: var(--accent-l); }
.chart-summary-item .lbl { font-size: 11px; color: var(--t2); }

/* ── Settings ──────────────────────────────────────── */
.settings-section { margin-bottom: 20px; }
.settings-section h3 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--t2);
  margin-bottom: 10px;
}
.settings-row {
  background: var(--card);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--border);
  margin-bottom: 6px;
}
.settings-row-icon { font-size: 20px; flex-shrink: 0; }
.settings-row-content { flex: 1; }
.settings-row-title { font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.settings-row-sub   { font-size: 12px; color: var(--t2); }
.settings-row-action { flex-shrink: 0; }

.api-key-input {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--t1);
  font-size: 13px;
  font-family: monospace;
  margin-top: 8px;
  outline: none;
  transition: border-color .2s;
}
.api-key-input:focus { border-color: var(--accent); }

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}
.badge-green { background: rgba(0,230,118,.15); color: var(--green); }
.badge-red   { background: rgba(255,82,82,.15);  color: var(--red); }

/* ── Toast ─────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: calc(var(--nav-h) + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--t1);
  opacity: 0;
  transition: opacity .25s, transform .25s;
  pointer-events: none;
  z-index: 200;
  white-space: nowrap;
  max-width: calc(100vw - 32px);
}
#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
#toast.success { border-color: var(--green); color: var(--green); }
#toast.error   { border-color: var(--red);   color: var(--red); }

/* ── Empty State ───────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--t3);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 14px; }

/* ── Modal ─────────────────────────────────────────── */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  z-index: 300;
  align-items: flex-end;
  justify-content: center;
}
.modal-backdrop.show { display: flex; }
.modal {
  background: var(--bg2);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 24px 20px 32px;
  width: 100%;
  max-width: 480px;
  border-top: 1px solid var(--border);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-title { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.modal-actions { display: flex; gap: 10px; margin-top: 20px; }
.modal-actions .btn { flex: 1; }

/* ── Progress Bar ──────────────────────────────────── */
.progress-wrap { margin: 10px 0; }
.progress-bar {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width .3s ease;
  width: 0%;
}
.progress-label { font-size: 12px; color: var(--t2); margin-top: 4px; }

/* ── Scrollbar ─────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── Divider ───────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--border); margin: 14px 0; }

/* ── Today Date Button ──────────────────────────────── */
.today-date-btn {
  font-size: 12px;
  color: var(--accent-l);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 12px;
  cursor: pointer;
  transition: background .2s, border-color .2s;
  white-space: nowrap;
  font-family: inherit;
}
.today-date-btn:hover,
.today-date-btn:active { background: var(--card2); border-color: var(--accent); }

/* ── Calendar Popup ─────────────────────────────────── */
.calendar-popup {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 14px;
  display: none;
}
.calendar-popup.show { display: block; }

.cal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.cal-header > span {
  font-size: 14px;
  font-weight: 700;
  color: var(--t1);
}
.cal-nav-btn {
  background: var(--card2);
  border: 1px solid var(--border);
  color: var(--t2);
  width: 28px; height: 28px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .15s;
}
.cal-nav-btn:hover { color: var(--t1); }

.cal-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  margin-bottom: 4px;
}
.cal-weekdays span {
  text-align: center;
  font-size: 10px;
  color: var(--t3);
  padding: 2px 0;
  font-weight: 600;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}
.cal-day {
  background: none;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--t3);
  font-size: 12px;
  padding: 6px 2px;
  cursor: pointer;
  text-align: center;
  transition: background .15s, color .15s, border-color .15s;
  font-family: inherit;
}
.cal-day:hover:not(:disabled) { background: var(--card2); color: var(--t1); }
.cal-day.has-data {
  color: var(--t1);
  font-weight: 600;
  background: rgba(124,111,255,.12);
  border-color: rgba(124,111,255,.2);
}
.cal-day.has-data:hover { border-color: var(--accent); background: var(--accent-glow); }
.cal-day.is-today {
  border-color: var(--accent-l) !important;
  color: var(--accent-l) !important;
  font-weight: 700;
}
.cal-day:disabled { opacity: 0; pointer-events: none; }