:root {
  --ink: #15161a;
  --charcoal: #202227;
  --charcoal-2: #262931;
  --chalk: #edeae2;
  --iron: #8a8d95;
  --iron-dim: #5b5e66;
  --plate-red: #e2432e;
  --plate-red-dim: #b8341f;
  --brass: #c9a24b;
  --success: #4c9a6a;
  --border: #34363d;

  --font-display: "Oswald", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--ink);
  color: var(--chalk);
  font-family: var(--font-body);
  -webkit-tap-highlight-color: transparent;
}

button, input, select {
  font-family: inherit;
  color: inherit;
}

.app {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 16px 48px;
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--ink);
  padding: 18px 0 10px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.brand-mark {
  color: var(--plate-red);
  font-size: 10px;
}

.brand h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0.06em;
  margin: 0;
}

.tabs {
  display: flex;
  gap: 4px;
  background: var(--charcoal);
  border-radius: 10px;
  padding: 4px;
}

.tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--iron);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 10px 0;
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.tab.active {
  background: var(--plate-red);
  color: var(--chalk);
}

/* ---------- Views ---------- */
.view { display: none; padding-top: 18px; }
.view.active { display: block; }

/* ---------- Session card (date/day type/weight form) ---------- */
.session-card {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 18px;
}

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

.field label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--iron);
  font-weight: 600;
}

.field input, .field select {
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 12px;
  font-size: 15px;
  color: var(--chalk);
  font-family: var(--font-mono);
}

.field select { font-family: var(--font-body); }

.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--plate-red);
}

/* ---------- Exercise slots ---------- */
.slots { display: flex; flex-direction: column; gap: 10px; }

.slot-card {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
}

.slot-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.plate-badge {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid var(--iron-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--iron);
  position: relative;
}

.plate-badge::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  border: 1px solid var(--iron-dim);
  opacity: 0.5;
}

.slot-card.filled .plate-badge {
  border-color: var(--plate-red);
  color: var(--chalk);
  background: var(--plate-red-dim);
}

.slot-card.filled .plate-badge::before { border-color: var(--plate-red); }

.exercise-name-input {
  flex: 1;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
  font-weight: 500;
}

.exercise-name-input:focus { outline: none; border-color: var(--plate-red); }

.history-btn {
  flex: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--brass);
  border-radius: 8px;
  padding: 9px 10px;
  font-size: 12px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  white-space: nowrap;
}

.history-btn:disabled { opacity: 0.35; cursor: default; }
.history-btn:not(:disabled):active { background: var(--charcoal-2); }

.slot-inputs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.slot-inputs .mini-field { display: flex; flex-direction: column; gap: 4px; }

.slot-inputs label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--iron);
}

.slot-inputs input {
  width: 100%;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  text-align: center;
}

.slot-inputs input:focus { outline: none; border-color: var(--plate-red); }

/* ---------- Save bar ---------- */
.save-bar {
  position: sticky;
  bottom: 0;
  background: linear-gradient(to top, var(--ink) 60%, transparent);
  padding: 16px 0 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.save-status {
  font-size: 12px;
  color: var(--success);
  min-height: 14px;
}

.btn {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 14px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  padding: 14px 22px;
}

.btn-primary { background: var(--plate-red); color: var(--chalk); }
.btn-primary:active { background: var(--plate-red-dim); }
.btn-block { width: 100%; }

.export-link {
  font-size: 12px;
  color: var(--brass);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.export-link:active { opacity: 0.7; }

/* ---------- Body weight view ---------- */
.chart-card, .table-card {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 18px;
}

.chart-head, .table-card h2 {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chart-wrap {
  position: relative;
  width: 100%;
  height: 240px;
}
.chart-wrap canvas {
  width: 100% !important;
  height: 100% !important;
}

.chart-head h2, .table-card h2 {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--chalk);
  margin: 0 0 12px;
}

.import-btn {
  font-size: 11px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--brass);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  cursor: pointer;
}

.empty-note { color: var(--iron); font-size: 13px; text-align: center; padding: 24px 0; }

.table-wrap { max-height: 260px; overflow-y: auto; }

table { width: 100%; border-collapse: collapse; }

th {
  text-align: left;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--iron);
  padding-bottom: 8px;
  position: sticky;
  top: 0;
  background: var(--charcoal);
}

td {
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 7px 0;
  border-top: 1px solid var(--border);
}

/* ---------- History overlay ---------- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: flex-end;
  justify-content: center;
  z-index: 100;
}

.overlay.open { display: flex; }

.history-sheet {
  background: var(--charcoal);
  border: 1px solid var(--border);
  border-radius: 16px 16px 0 0;
  width: 100%;
  max-width: 560px;
  max-height: 70vh;
  overflow-y: auto;
  padding: 18px 16px 28px;
  animation: slide-up 0.18s ease-out;
}

@keyframes slide-up {
  from { transform: translateY(16px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.history-head h2 {
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.03em;
  margin: 0;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--iron);
  font-size: 16px;
  cursor: pointer;
  padding: 4px 8px;
}

.history-row {
  display: grid;
  grid-template-columns: 84px 1fr 1fr 1fr;
  gap: 8px;
  align-items: center;
  padding: 10px 0;
  border-top: 1px solid var(--border);
}

.history-row:first-of-type { border-top: none; }

.history-row .h-date {
  font-size: 12px;
  color: var(--iron);
}

.history-row .h-stat {
  font-family: var(--font-mono);
  font-size: 13px;
  text-align: center;
}

.history-row .h-stat .h-label {
  display: block;
  font-size: 9px;
  color: var(--iron);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

.history-empty { color: var(--iron); font-size: 13px; text-align: center; padding: 20px 0; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--charcoal-2);
  border: 1px solid var(--border);
  color: var(--chalk);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 200;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

@media (min-width: 600px) {
  .slot-inputs { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Profile + past workouts additions ---------- */
.profile-line { display:flex; justify-content:space-between; align-items:center; margin:-6px 0 12px; color:var(--iron); font-size:11px; text-transform:uppercase; letter-spacing:.06em; }
.profile-edit { border:1px solid var(--border); background:transparent; color:var(--brass); border-radius:7px; padding:5px 8px; font-size:10px; cursor:pointer; text-transform:uppercase; }
.section-head { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:14px; }
.section-head h2 { font-family:var(--font-display); text-transform:uppercase; letter-spacing:.04em; margin:0 0 4px; font-size:18px; }
.section-head p { margin:0; color:var(--iron); font-size:12px; }
.btn-secondary { background:var(--charcoal); color:var(--chalk); border:1px solid var(--border); padding:9px 13px; }
.past-list { display:flex; flex-direction:column; gap:10px; }
.past-card { background:var(--charcoal); border:1px solid var(--border); border-radius:14px; overflow:hidden; }
.past-card summary { list-style:none; cursor:pointer; display:grid; grid-template-columns:1fr 1fr auto auto; align-items:center; gap:8px; padding:14px; }
.past-card summary::-webkit-details-marker { display:none; }
.past-card summary span { color:var(--iron); font-family:var(--font-mono); font-size:12px; }
.past-card summary strong { font-family:var(--font-display); text-transform:uppercase; font-size:14px; }
.past-card summary small { color:var(--iron); font-size:10px; text-align:right; }
.delete-session-btn { background:transparent; border:1px solid var(--border); color:var(--iron); border-radius:8px; width:30px; height:30px; font-size:13px; cursor:pointer; display:flex; align-items:center; justify-content:center; }
.delete-session-btn:hover { border-color:var(--plate-red); color:var(--plate-red); }
.past-exercises { border-top:1px solid var(--border); padding:0 14px 8px; }
.past-exercise { display:grid; grid-template-columns:1fr repeat(3,auto); gap:10px; align-items:center; padding:10px 0; border-bottom:1px solid var(--border); font-size:12px; }
.past-exercise:last-child { border-bottom:0; }
.past-exercise b { font-family:var(--font-mono); font-weight:500; color:var(--chalk); }
.suggestion-box { margin:-3px 0 9px 40px; background:var(--ink); border:1px solid var(--border); border-radius:9px; overflow:hidden; }
.suggestion-title { padding:8px 10px; color:var(--iron); font-size:10px; text-transform:uppercase; letter-spacing:.05em; }
.suggestion-row { width:100%; border:0; border-top:1px solid var(--border); background:transparent; color:var(--chalk); display:grid; grid-template-columns:1.2fr 1fr 1fr 1fr; gap:6px; padding:9px 10px; font-family:var(--font-mono); font-size:10px; text-align:left; }
.suggestion-row:first-of-type { border-top:0; }
.suggestion-row b { font-weight:500; text-align:right; }
.onboarding-card { width:min(92vw,420px); background:var(--charcoal); border:1px solid var(--border); border-radius:18px; padding:24px; box-shadow:0 20px 60px rgba(0,0,0,.45); }
.onboarding-card h2 { font-family:var(--font-display); text-transform:uppercase; letter-spacing:.04em; margin:6px 0; }
.onboarding-card p { color:var(--iron); font-size:13px; line-height:1.5; margin:0 0 18px; }
.brand-mark.large { font-size:14px; }
.overlay#onboarding { align-items:center; }
.overlay#onboarding:not([hidden]) { display:flex; }
@media (max-width:430px) { .past-card summary { grid-template-columns:1fr auto auto; } .past-card summary strong { grid-column:1; } .past-card summary small { grid-column:2; grid-row:1 / span 2; } .suggestion-row { grid-template-columns:1.1fr 1fr 1fr; } .suggestion-row b:last-child { display:none; } }