:root {
  --bg: #f5f5f5;
  --surface: #ffffff;
  --surface2: #eeeeee;
  --text: #1a1a1a;
  --text-muted: #666666;
  --border: #dddddd;
  --accent: #e94560;
  --accent-fg: #ffffff;
  --btn-bg: #ffffff;
  --btn-border: #cccccc;
  --btn-text: #1a1a1a;
  --btn-disabled-bg: #f0f0f0;
  --btn-disabled-text: #999999;
  --progress-track: #e0e0e0;
  --calm: #888888;
  --warming: #2196f3;
  --building: #ff9800;
  --close: #ff5722;
  --ready: #4caf50;
  --warn-bg: #fff3e0;
  --warn-border: #ff9800;
  --warn-text: #e65100;
  --excited-bg: #e8f5e9;
  --excited-border: #4caf50;
  --excited-text: #2e7d32;
  --session-btn-bg: #fff8e1;
  --session-btn-border: #ffc107;
  --session-btn-text: #7b5800;
  --history-row-alt: #f9f9f9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f1a;
    --surface: #1a1a2e;
    --surface2: #242438;
    --text: #f0f0f0;
    --text-muted: #999999;
    --border: #333355;
    --accent: #e94560;
    --accent-fg: #ffffff;
    --btn-bg: #1e1e35;
    --btn-border: #3a3a55;
    --btn-text: #f0f0f0;
    --btn-disabled-bg: #161625;
    --btn-disabled-text: #555577;
    --progress-track: #2a2a42;
    --calm: #888888;
    --warming: #64b5f6;
    --building: #ffb74d;
    --close: #ff8a65;
    --ready: #81c784;
    --warn-bg: #2a1800;
    --warn-border: #ff9800;
    --warn-text: #ffb74d;
    --excited-bg: #0a2010;
    --excited-border: #4caf50;
    --excited-text: #81c784;
    --session-btn-bg: #1a1500;
    --session-btn-border: #7b6000;
    --session-btn-text: #ffd54f;
    --history-row-alt: #161625;
  }
}

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  padding: 0 0 env(safe-area-inset-bottom);
}

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ── Status bar ── */
.status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.mode-badge {
  font-size: 13px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  background: var(--accent);
  color: var(--accent-fg);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mode-badge.maintaining {
  background: #4caf50;
}

.session-time {
  font-size: 14px;
  color: var(--text-muted);
}

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

/* ── Progress ── */
.progress-section {
  text-align: center;
}

.progress-fraction {
  font-size: 52px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -2px;
  color: var(--calm);
  transition: color 0.3s;
}

.progress-fraction.warming  { color: var(--warming); }
.progress-fraction.building { color: var(--building); }
.progress-fraction.close    { color: var(--close); }
.progress-fraction.ready    { color: var(--ready); }

.progress-fraction.mood-tired,
.progress-fraction.mood-dull    { color: var(--calm); }
.progress-fraction.mood-normal  { color: var(--warming); }
.progress-fraction.mood-happy,
.progress-fraction.mood-smile   { color: var(--building); }
.progress-fraction.mood-fun     { color: var(--close); }
.progress-fraction.mood-excited { color: var(--ready); }

.progress-label {
  font-size: 14px;
  font-weight: 600;
  margin-top: 4px;
  color: var(--text-muted);
}

.progress-bar-track {
  margin: 12px 0 6px;
  height: 10px;
  background: var(--progress-track);
  border-radius: 5px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 5px;
  background: var(--calm);
  transition: width 0.4s, background 0.3s;
}
.progress-bar-fill.warming  { background: var(--warming); }
.progress-bar-fill.building { background: var(--building); }
.progress-bar-fill.close    { background: var(--close); }
.progress-bar-fill.ready    { background: var(--ready); }

.progress-bar-fill.mood-tired,
.progress-bar-fill.mood-dull    { background: var(--calm); }
.progress-bar-fill.mood-normal  { background: var(--warming); }
.progress-bar-fill.mood-happy,
.progress-bar-fill.mood-smile   { background: var(--building); }
.progress-bar-fill.mood-fun     { background: var(--close); }
.progress-bar-fill.mood-excited { background: var(--ready); }

.progress-estimate-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.mood-sprite {
  width: 80px;
  height: 90px;
  background-image: url('./buddy-moods.webp');
  background-size: 500% auto;
  background-repeat: no-repeat;
  margin: 8px auto;
}
.mood-sprite.hidden   { display: none; }
.mood-sprite.sprite-0 { background-position: 0%   0%; }
.mood-sprite.sprite-1 { background-position: 25%  0%; }
.mood-sprite.sprite-2 { background-position: 50%  0%; }
.mood-sprite.sprite-3 { background-position: 75%  0%; }
.mood-sprite.sprite-4 { background-position: 100% 0%; }

/* ── Recommendation ── */
.recommendation {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
}

.recommendation strong {
  color: var(--accent);
}

/* ── Interaction buttons ── */
.buttons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.interaction-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  padding: 10px 8px;
  background: var(--btn-bg);
  border: 2px solid var(--btn-border);
  border-radius: 12px;
  cursor: pointer;
  color: var(--btn-text);
  font-family: inherit;
  transition: border-color 0.2s, background 0.2s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

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

.interaction-btn:disabled {
  background: var(--btn-disabled-bg);
  color: var(--btn-disabled-text);
  border-color: var(--btn-border);
  cursor: not-allowed;
  opacity: 0.7;
}

.interaction-btn.ready {
  border-color: var(--ready);
}

.interaction-btn .btn-label {
  font-size: 15px;
  font-weight: 600;
}

.interaction-btn .btn-cooldown {
  font-size: 12px;
  margin-top: 4px;
  color: var(--text-muted);
}

.interaction-btn.ready .btn-cooldown {
  color: var(--ready);
  font-weight: 600;
}

/* ── Excited controls ── */
.excited-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-confirm-excited {
  width: 100%;
  padding: 18px;
  font-size: 17px;
  font-weight: 700;
  background: var(--ready);
  color: #fff;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn-confirm-excited:active {
  opacity: 0.85;
}

.btn-end-excited {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  font-weight: 600;
  background: transparent;
  color: var(--text-muted);
  border: 2px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn-end-excited:active {
  opacity: 0.7;
}

/* ── Maintenance status ── */
.maintenance-status {
  border-color: var(--excited-border);
  background: var(--excited-bg);
  display: none;
}

.maintenance-status.visible {
  display: block;
}

.maintenance-header {
  font-size: 18px;
  font-weight: 700;
  color: var(--excited-text);
  margin-bottom: 8px;
}

.maintenance-since {
  font-size: 14px;
  color: var(--excited-text);
  margin-bottom: 8px;
}

.risk-warning {
  display: none;
  margin-top: 10px;
  padding: 10px 12px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  border-radius: 8px;
  color: var(--warn-text);
  font-size: 14px;
  font-weight: 600;
}

.risk-warning.visible {
  display: block;
}

/* ── Notifications bar ── */
.notifications-bar {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.notifications-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-notifications {
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  flex-shrink: 0;
}

.notifications-status {
  font-size: 13px;
  color: var(--text-muted);
}

.btn-test-notification {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 600;
  background: var(--surface2);
  border: 1px dashed var(--border);
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-muted);
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  flex-shrink: 0;
}

.notifications-note {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ── History ── */
.history-section h2 {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.history-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.history-item {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: baseline;
  gap: 8px;
  padding: 7px 4px;
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

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

.history-item:nth-child(even) {
  background: var(--history-row-alt);
}

.history-time {
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.history-type {
  font-weight: 500;
}

.history-ep {
  font-size: 13px;
  font-weight: 600;
  color: var(--ready);
  white-space: nowrap;
}

.history-ep.cooldown {
  color: var(--text-muted);
  font-weight: 400;
}

.history-item.history-decay {
  opacity: 0.65;
  font-style: italic;
}

.history-ep.negative {
  color: var(--accent);
  font-weight: 600;
}

.history-empty {
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  padding: 16px 0;
}

/* ── Session controls ── */
.session-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.btn-new-session {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  font-weight: 700;
  background: var(--session-btn-bg);
  border: 2px solid var(--session-btn-border);
  border-radius: 12px;
  cursor: pointer;
  color: var(--session-btn-text);
  font-family: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn-new-session:active {
  opacity: 0.8;
}

.session-note {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}