:root {
  --bg: #141821;
  --bg-card: #1d2330;
  --bg-input: #262e3f;
  --border: #2e3648;
  --text: #eef1f7;
  --text-dim: #9aa4bd;
  --accent: #5ce1a6;
  --accent-dim: #3a9c74;
  --danger: #ef6f6f;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: 72px;
}

/* ---- generic elements ---- */
h1, h2, h3 { margin: 0 0 8px; }
p { color: var(--text-dim); margin: 4px 0 16px; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 600;
}

.btn-primary { background: var(--accent); color: #08150f; width: 100%; }
.btn-primary:disabled { opacity: 0.5; }
.btn-secondary { background: var(--bg-input); color: var(--text); }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
.btn-link { background: none; color: var(--accent); padding: 8px; }

input, select, textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  margin-bottom: 12px;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
label { font-size: 13px; color: var(--text-dim); display: block; margin-bottom: 4px; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
}

.error-box {
  background: rgba(239, 111, 111, 0.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 12px;
}

/* ---- auth screen ---- */
.auth-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
}
.auth-logo { text-align: center; margin-bottom: 24px; font-size: 40px; }
.auth-toggle { text-align: center; margin-top: 16px; }

/* ---- top bar ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
  border-bottom: 1px solid var(--border);
}
.topbar h1 { font-size: 18px; }

main { padding: 16px; }

/* ---- bottom nav ---- */
.tabbar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  max-width: 480px;
  margin: 0 auto;
  padding-bottom: env(safe-area-inset-bottom);
}
.tabbar button {
  flex: 1;
  background: none;
  border-radius: 0;
  color: var(--text-dim);
  font-size: 12px;
  padding: 10px 4px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.tabbar button.active { color: var(--accent); }
.tabbar .icon { font-size: 20px; }

/* ---- workout log form ---- */
.set-row {
  display: grid;
  grid-template-columns: 30px 1fr 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}
.set-row .set-label { color: var(--text-dim); font-size: 13px; }
.set-row input { margin-bottom: 0; }

/* ---- lists ---- */
.log-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.log-item:last-child { border-bottom: none; }
.log-item .meta { color: var(--text-dim); font-size: 13px; }
.log-item .sets { font-size: 13px; color: var(--text-dim); margin-top: 4px; }

.progress-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.progress-row:last-child { border-bottom: none; }
.progress-row .name { font-weight: 600; }
.progress-row .sub { font-size: 12px; color: var(--text-dim); }
.badge {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 700;
}
.badge.yes { background: rgba(92,225,166,0.15); color: var(--accent); }
.badge.no { background: rgba(154,164,189,0.15); color: var(--text-dim); }

.empty-state { text-align: center; color: var(--text-dim); padding: 40px 20px; }

.program-phase-title { color: var(--accent); font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; margin: 20px 0 8px; }
.program-session-title { font-weight: 600; margin: 12px 0 4px; }
.program-ex {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.program-ex .name { flex: 1; }
.program-ex .spec { color: var(--text-dim); font-size: 13px; text-align: right; }

.spinner { text-align: center; padding: 40px; color: var(--text-dim); }