:root {
  --bg: #0f0f1a;
  --card: #1a1a2e;
  --card-alt: #16213e;
  --accent: #7c3aed;
  --accent-light: #a78bfa;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
  --text: #f1f5f9;
  --text-dim: #94a3b8;
  --border: #2d2d44;
  --radius: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  height: 100%;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
}

/* Offline banner */
.offline-banner {
  display: none;
  position: fixed; top: 0; left: 0; right: 0;
  background: var(--yellow); color: #000;
  text-align: center; padding: 6px; font-size: 13px; font-weight: 600;
  z-index: 1000;
}
.offline-banner.show { display: block; }

/* App layout */
.app-container {
  display: flex; flex-direction: column;
  height: 100vh; height: 100dvh;
}

.screen {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px 16px 24px;
  display: none;
}
.screen.active { display: block; }

.screen-title {
  font-size: 28px; font-weight: 800;
  margin-bottom: 16px;
}

/* Bottom nav */
.bottom-nav {
  display: flex;
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 4px 0;
  padding-bottom: calc(4px + env(safe-area-inset-bottom));
  flex-shrink: 0;
}

.nav-btn {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  gap: 2px; padding: 8px 4px;
  background: none; border: none; color: var(--text-dim);
  font-size: 10px; font-weight: 600; cursor: pointer;
  transition: color .15s;
}
.nav-btn.active { color: var(--accent); }
.nav-btn svg { width: 24px; height: 24px; }

/* Cards */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 20px; border-radius: 10px;
  font-size: 15px; font-weight: 600;
  border: none; cursor: pointer;
  min-height: 48px; min-width: 48px;
  transition: opacity .15s, transform .1s;
}
.btn:active { opacity: .8; transform: scale(.97); }

.btn-primary { background: var(--accent); color: #fff; }
.btn-success { background: var(--green); color: #fff; }
.btn-danger { background: var(--red); color: #fff; }
.btn-outline {
  background: transparent; color: var(--accent);
  border: 2px solid var(--accent);
}
.btn-sm { padding: 8px 12px; font-size: 13px; min-height: 40px; }
.btn-block { width: 100%; }
.btn-cancel-workout {
  background: transparent; color: var(--text-dim); border: 1px solid var(--border);
  border-radius: 8px; width: 36px; height: 36px; min-height: 36px; min-width: 36px;
  padding: 0; font-size: 16px; cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: color .15s, border-color .15s;
}
.btn-cancel-workout:active { color: var(--red); border-color: var(--red); }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* Inputs */
input[type="number"], input[type="text"], input[type="password"], textarea, select {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 12px;
  font-size: 16px;
  min-height: 48px;
  width: 100%;
  -webkit-appearance: none;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
textarea { resize: vertical; min-height: 80px; }

label {
  display: block;
  font-size: 13px; font-weight: 600; color: var(--text-dim);
  margin-bottom: 6px;
}

.form-group { margin-bottom: 16px; }

/* ---- TODAY SCREEN ---- */
.workout-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px;
}
.workout-header h2 { font-size: 20px; font-weight: 700; }
.workout-timer-display {
  font-size: 14px; color: var(--accent-light);
  font-variant-numeric: tabular-nums;
}

.exercise-card {
  background: var(--card);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border-left: 4px solid var(--border);
  transition: border-color .3s;
}
/* The set info (label + target) sits on its own line on narrow screens,
   inputs + actions wrap to a second line */
.set-info { flex-shrink: 0; }

@media (max-width: 500px) {
  .set-row {
    flex-wrap: wrap;
  }
  .set-info {
    width: 100%;
    display: flex;
    gap: 8px;
    align-items: baseline;
    margin-bottom: 2px;
  }
  .set-inputs {
    flex: 1;
  }
}
.exercise-card.completed { border-left-color: var(--green); }
.exercise-card.has-failure { border-left-color: var(--red); }

.exercise-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px;
  cursor: pointer;
}
.exercise-name { font-size: 16px; font-weight: 700; }
.exercise-status-badge {
  font-size: 12px; font-weight: 600; padding: 4px 10px;
  border-radius: 20px;
}
.badge-done { background: var(--green); color: #fff; }
.badge-partial { background: var(--yellow); color: #000; }

.exercise-body { padding: 0 16px 16px; }

.exercise-notes {
  font-size: 13px; color: var(--text-dim);
  margin-bottom: 12px; font-style: italic;
}
.exercise-links {
  display: flex; gap: 12px; margin-bottom: 10px;
}
.exercise-link-btn {
  background: none; border: none; color: var(--accent-light); font-size: 12px;
  cursor: pointer; padding: 0; display: flex; align-items: center; gap: 4px;
  text-decoration: underline; text-underline-offset: 2px;
}
.exercise-link-btn:active { opacity: 0.6; }

/* Set row */
.set-row {
  display: flex; flex-wrap: wrap;
  gap: 6px; align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.set-row:last-of-type { border-bottom: none; }
.set-row.set-done { opacity: .6; }
.set-row.set-failed { opacity: .7; }

.set-label {
  font-size: 13px; font-weight: 700; color: var(--text-dim);
  min-width: 32px;
}
.set-target {
  font-size: 11px; color: var(--text-dim);
}
.set-last-time {
  font-size: 10px; color: var(--text-dim); opacity: 0.5;
}
.warmup-row {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 0; margin-bottom: 4px; opacity: 0.6;
  border-bottom: 1px dashed var(--border);
}
.warmup-row input {
  background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); padding: 6px; font-size: 14px; text-align: center;
}

.set-inputs {
  display: flex; gap: 4px; align-items: center;
  flex: 1; min-width: 0;
}
.set-inputs input {
  width: 52px; flex: 0 0 52px; text-align: center;
  padding: 8px 2px; font-size: 16px; font-weight: 600;
  min-height: 44px;
}
.set-inputs .unit-label {
  font-size: 11px; color: var(--text-dim); white-space: nowrap;
}

.set-actions {
  display: flex; gap: 3px; flex-shrink: 0;
  margin-left: auto;
}
.set-btn {
  width: 36px; height: 36px;
  border-radius: 8px; border: none;
  font-size: 14px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: opacity .15s;
}
.set-btn:active { opacity: .7; }
.set-btn-done { background: var(--green); color: #fff; }
.set-btn-fail { background: var(--red); color: #fff; }
.set-btn-skip { background: var(--border); color: var(--text-dim); }
.set-btn.active { box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.5); }

/* Exercise footer: RPE + rest timer */
.exercise-footer {
  display: flex; gap: 12px; align-items: center;
  padding-top: 12px; margin-top: 8px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.rpe-selector {
  display: flex; align-items: center; gap: 6px;
}
.rpe-selector label { margin: 0; }
.rpe-selector select {
  width: 60px; min-height: 40px;
  padding: 6px; text-align: center;
}

/* Global Rest Timer Bar — fixed at top */
.global-rest-bar {
  display: none;
  position: fixed;
  top: env(safe-area-inset-top, 0px);
  left: 0;
  right: 0;
  height: 56px;
  background: #166534;
  border-bottom: 2px solid #22c55e;
  overflow: hidden;
  z-index: 200;
  cursor: pointer;
}
.global-rest-bar.visible { display: block; }
.global-rest-bar.visible ~ .app-container { padding-top: 56px; }
.global-rest-bar.running {
  background: #7f1d1d;
  border-bottom-color: #ef4444;
}
.global-rest-bar.warning {
  background: #78350f;
  border-bottom-color: var(--yellow);
}
.global-rest-bar.warning .global-rest-progress {
  background: rgba(234,179,8,0.3);
}
.global-rest-bar.ringing {
  background: #166534;
  border-bottom-color: #22c55e;
  animation: pulse-bar .5s infinite alternate;
}
@keyframes pulse-bar { to { opacity: .6; } }

.global-rest-progress {
  position: absolute;
  top: 0; left: 0; bottom: 0;
  background: rgba(239,68,68,0.3);
  width: 100%;
}

.global-rest-content {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  height: 100%;
}

.global-rest-label {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 60%;
}

.global-rest-display {
  font-size: 28px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: #fff;
}

/* Collapsed exercise summary */
.exercise-summary {
  padding: 4px 16px 14px;
  font-size: 13px; color: var(--green);
  display: none;
}
.exercise-card.completed .exercise-summary { display: block; }
.exercise-card.completed .exercise-body { display: none; }

/* Finish workout FAB */
.finish-workout-fab {
  display: none;
  position: fixed;
  bottom: calc(80px + env(safe-area-inset-bottom));
  left: 50%; transform: translateX(-50%);
  z-index: 100;
  transition: bottom 0.2s;
}
.finish-workout-fab.show { display: block; }

/* No workout today */
.rest-day-msg {
  text-align: center; padding: 60px 20px;
  color: var(--text-dim);
}
.rest-day-msg h2 { font-size: 48px; margin-bottom: 12px; }
.rest-day-msg p { font-size: 16px; }

/* ---- HISTORY SCREEN ---- */
.history-swipe-wrap {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  margin-bottom: 10px;
}

.history-swipe-delete {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 80px;
  background: #ef4444;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  z-index: 0;
}

.history-item {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  transition: transform .25s ease, background .15s;
  position: relative;
  z-index: 1;
}
.history-item.swiped { transform: translateX(-80px); }
.history-item:active { background: var(--card-alt); }

.history-date { font-size: 13px; color: var(--text-dim); }
.history-name { font-size: 16px; font-weight: 700; margin-top: 2px; }
.history-meta {
  display: flex; gap: 16px; margin-top: 6px;
  font-size: 13px; color: var(--text-dim);
}

.history-detail {
  display: none;
  padding: 12px 0 0;
  border-top: 1px solid var(--border);
  margin-top: 12px;
}
.history-item.expanded .history-detail { display: block; }

.history-exercise-block { margin-bottom: 12px; }
.history-exercise-name { font-weight: 600; margin-bottom: 4px; }
.history-set-line { font-size: 13px; color: var(--text-dim); padding: 2px 0; }
.history-set-line.failed { color: var(--red); }
.history-set-line.skipped { color: var(--text-dim); opacity: .5; }
.history-rpe { font-size: 12px; color: var(--accent-light); margin-top: 2px; }

/* Chart */
.chart-modal {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.85); z-index: 200;
  flex-direction: column; align-items: center; justify-content: center;
  padding: 20px;
}
.chart-modal.show { display: flex; }
.chart-modal h3 { margin-bottom: 12px; font-size: 18px; }
.chart-modal canvas { width: 100%; max-width: 400px; height: 250px; background: var(--card); border-radius: var(--radius); }
.chart-close {
  margin-top: 16px; padding: 10px 24px;
  background: var(--accent); color: #fff;
  border: none; border-radius: 8px; font-size: 15px; cursor: pointer;
}

.history-chart-btn {
  font-size: 13px; color: var(--accent-light);
  background: none; border: none; cursor: pointer;
  padding: 4px 0; text-decoration: underline;
}

.history-empty {
  text-align: center; padding: 60px 20px; color: var(--text-dim);
}

/* ---- PROGRAMME SCREEN ---- */
.programme-day {
  background: var(--card);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
}
.programme-day-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; cursor: pointer;
}
.programme-day-header h3 { font-size: 16px; font-weight: 700; }
.programme-day-header .day-label {
  font-size: 12px; color: var(--text-dim);
}
.programme-day-body {
  display: none; padding: 0 16px 16px;
}
.programme-day.expanded .programme-day-body { display: block; }

.programme-exercise {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.programme-exercise:last-child { border-bottom: none; }
.programme-ex-name { font-weight: 600; font-size: 14px; }
.programme-ex-sets { font-size: 13px; color: var(--text-dim); margin-top: 2px; }
.programme-ex-notes { font-size: 12px; color: var(--accent-light); margin-top: 2px; }

.programme-edit-btn {
  margin-top: 8px;
}

/* ---- AI COACH SCREEN ---- */
.ai-coach-cards { display: flex; flex-direction: column; gap: 12px; }

.ai-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: background .15s;
}
.ai-card:active { background: var(--card-alt); }
.ai-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.ai-card p { font-size: 13px; color: var(--text-dim); }

.ai-response {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 16px;
  white-space: pre-wrap;
  font-size: 14px;
  line-height: 1.6;
  display: none;
}
.ai-response.show { display: block; }

.ai-loading {
  display: none;
  text-align: center; padding: 20px;
  color: var(--accent-light); font-size: 14px;
}
.ai-loading.show { display: block; }

.ai-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid var(--red);
  border-radius: var(--radius);
  padding: 12px; margin-top: 12px;
  font-size: 13px; color: var(--red);
  display: none;
}
.ai-error.show { display: block; }

/* ---- SETTINGS SCREEN ---- */
.settings-section {
  margin-bottom: 24px;
}
.settings-section h3 {
  font-size: 14px; font-weight: 700; color: var(--text-dim);
  text-transform: uppercase; letter-spacing: 1px;
  margin-bottom: 12px;
}

.settings-actions {
  display: flex; flex-direction: column; gap: 10px;
  margin-top: 24px;
}

.version-info {
  text-align: center;
  font-size: 12px; color: var(--text-dim);
  margin-top: 32px;
}

/* ---- MODAL ---- */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.7); z-index: 300;
  align-items: flex-end; justify-content: center;
}
.modal-overlay.show { display: flex; }

.modal-sheet {
  background: var(--card);
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%; max-width: 500px;
  max-height: 85vh; overflow-y: auto;
  padding: 24px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom));
}
.modal-sheet h2 {
  font-size: 20px; font-weight: 700; margin-bottom: 16px;
}

/* Workout complete modal */
.workout-complete-stat {
  display: flex; justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.workout-complete-stat:last-child { border-bottom: none; }
.stat-label { color: var(--text-dim); font-size: 14px; }
.stat-value { font-weight: 700; font-size: 14px; }

/* Progression summary */
.progression-summary {
  margin: 16px 0; padding: 12px;
  background: var(--bg); border-radius: var(--radius);
  border: 1px solid var(--border);
}
.progression-summary h3 { font-size: 14px; margin-bottom: 10px; color: var(--text-dim); }
.prog-item {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 0; font-size: 13px;
}
.prog-icon { width: 16px; text-align: center; font-size: 10px; }
.prog-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.prog-detail { font-weight: 600; white-space: nowrap; }
.prog-increase .prog-icon { color: var(--green); }
.prog-increase .prog-detail { color: var(--green); }
.prog-decrease .prog-icon { color: var(--red); }
.prog-decrease .prog-detail { color: var(--red); }
.prog-hold .prog-icon { color: var(--yellow); }
.prog-hold .prog-detail { color: var(--text-dim); }
.prog-plateau .prog-icon { color: var(--yellow); }
.prog-plateau .prog-name { color: var(--yellow); }
.prog-reason { margin-top: 8px; font-size: 11px; color: var(--text-dim); opacity: 0.7; line-height: 1.5; }

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

/* Safe area */
@supports (padding: env(safe-area-inset-top)) {
  .screen { padding-top: calc(16px + env(safe-area-inset-top)); }
}

/* Edit programme modal */
.edit-set-row {
  display: flex; gap: 8px; align-items: center;
  margin-bottom: 8px;
}
.edit-set-row input { width: 80px; }
.edit-set-row .remove-set-btn {
  width: 36px; height: 36px; border-radius: 6px;
  background: var(--red); color: #fff; border: none;
  font-size: 18px; cursor: pointer;
}

/* Sync status */
.sync-status-ok { color: #22c55e; }
.sync-status-error { color: #ef4444; cursor: pointer; }