/* ============================================================
   IRON LOG — Industrial / utilitarian gym aesthetic
   Heavy condensed display type, monospace numerals,
   matte-black surfaces, hot orange accent like a barbell collar.
   ============================================================ */

:root {
  /* Color */
  --bg: #0a0a0a;
  --bg-elev: #141414;
  --bg-elev-2: #1c1c1c;
  --line: #262626;
  --line-strong: #383838;
  --text: #f4f4f0;
  --text-dim: #8a8a82;
  --text-faint: #555550;
  --accent: #ff5a1f;        /* hot orange — collar/plate red */
  --accent-soft: #ff5a1f22;
  --accent-strong: #ff7a3d;
  --danger: #e0405a;
  --good: #5be0a0;
  --warn: #ffc857;

  /* Type */
  --font-display: "Bebas Neue", "Oswald", "Arial Narrow", sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  /* Geometry */
  --radius: 4px;
  --radius-lg: 8px;
  --grid: 8px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 20% 0%, rgba(255, 90, 31, 0.06), transparent 40%),
    radial-gradient(circle at 90% 100%, rgba(255, 90, 31, 0.04), transparent 40%);
  background-attachment: fixed;
}

/* Subtle grain overlay — gives it the "old gym wall" feel */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.04 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: 0.5;
  z-index: 1;
  mix-blend-mode: overlay;
}

/* ----- Topbar ----- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: calc(var(--grid) * 3);
  padding: calc(var(--grid) * 2) calc(var(--grid) * 3);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--grid);
}
.brand-mark {
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: -2px;
}
.brand h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 28px;
  letter-spacing: 3px;
  font-weight: 400;
}

.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 3px;
  width: max-content;
  justify-self: center;
}
.tab {
  padding: 8px 18px;
  background: transparent;
  color: var(--text-dim);
  border: 0;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 2px;
  cursor: pointer;
  border-radius: calc(var(--radius) - 1px);
  transition: all 0.15s;
}
.tab:hover { color: var(--text); }
.tab.active {
  background: var(--accent);
  color: #1a0a02;
  font-weight: 400;
}

.topbar-actions { display: flex; gap: 6px; }

/* ----- Buttons ----- */
.primary-btn, .secondary-btn, .ghost-btn, .danger-btn {
  font-family: var(--font-display);
  letter-spacing: 2px;
  cursor: pointer;
  border-radius: var(--radius);
  transition: all 0.15s;
  border: 0;
}
.primary-btn {
  background: var(--accent);
  color: #1a0a02;
  padding: 12px 22px;
  font-size: 16px;
  border: 1px solid var(--accent);
}
.primary-btn:hover { background: var(--accent-strong); }

.secondary-btn {
  background: transparent;
  color: var(--text);
  padding: 12px 22px;
  font-size: 16px;
  border: 1px solid var(--line-strong);
}
.secondary-btn:hover { border-color: var(--text-dim); }

.ghost-btn {
  background: transparent;
  color: var(--text-dim);
  padding: 8px 12px;
  font-size: 14px;
  border: 1px solid transparent;
}
.ghost-btn:hover { color: var(--text); background: var(--bg-elev); }

.danger-btn {
  background: transparent;
  color: var(--danger);
  padding: 6px 10px;
  font-size: 12px;
  border: 1px solid transparent;
}
.danger-btn:hover { border-color: var(--danger); }

/* ----- Inputs ----- */
.input, .select {
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 10px 12px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 14px;
  outline: 0;
  transition: border-color 0.15s;
}
.input:focus, .select:focus { border-color: var(--accent); }

/* ----- Main / Views ----- */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: calc(var(--grid) * 4) calc(var(--grid) * 3);
  position: relative;
  z-index: 2;
}

.view { display: none; animation: fadeIn 0.25s ease; }
.view.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.view-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: calc(var(--grid) * 4);
  gap: calc(var(--grid) * 3);
  flex-wrap: wrap;
}
.view-header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 56px;
  letter-spacing: 2px;
  line-height: 0.9;
  font-weight: 400;
}
.eyebrow {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
}

/* ----- Session stats ----- */
.session-meta {
  display: flex;
  gap: calc(var(--grid) * 3);
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding: 12px 16px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-width: 90px;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
}
.stat-value {
  font-family: var(--font-display);
  font-size: 32px;
  letter-spacing: 1px;
  color: var(--text);
  line-height: 1;
  margin-top: 4px;
}

/* ----- Exercise cards (log view) ----- */
.exercise-list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--grid) * 2);
  margin-bottom: calc(var(--grid) * 3);
}

.exercise-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.exercise-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-elev-2);
}
.exercise-name {
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: 2px;
  margin: 0;
}
.exercise-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.sets-table {
  width: 100%;
  border-collapse: collapse;
}
.sets-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  font-weight: 500;
}
.sets-table th.num { text-align: right; }
.sets-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
}
.sets-table tr:last-child td { border-bottom: 0; }
.sets-table input {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px dashed transparent;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 16px;
  padding: 4px 6px;
  text-align: right;
}
.sets-table td:first-child input { text-align: left; }
.sets-table input:focus {
  outline: 0;
  border-bottom-color: var(--accent);
  background: var(--accent-soft);
}
.sets-table .set-idx {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--accent);
  width: 32px;
  letter-spacing: 1px;
  padding-left: 16px;
}
.set-pr {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 1px;
  background: var(--accent);
  color: #1a0a02;
  padding: 2px 5px;
  border-radius: 2px;
  margin-left: 6px;
  vertical-align: middle;
}

.exercise-foot {
  display: flex;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-elev-2);
  border-top: 1px solid var(--line);
}
.exercise-foot button {
  background: transparent;
  border: 0;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  padding: 4px 8px;
}
.exercise-foot button:hover { color: var(--accent); }

.log-actions {
  display: flex;
  gap: var(--grid);
  justify-content: center;
  padding: calc(var(--grid) * 2) 0;
}

.empty-state {
  text-align: center;
  padding: calc(var(--grid) * 8) 0;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-lg);
  color: var(--text-dim);
}
.empty-state p { margin: 0; font-family: var(--font-mono); font-size: 13px; letter-spacing: 1px; }
.empty-state .big {
  font-family: var(--font-display);
  font-size: 40px;
  letter-spacing: 2px;
  color: var(--text-faint);
  margin-bottom: 8px;
  display: block;
}

/* ----- Calendar ----- */
.cal-nav { display: flex; gap: 4px; }

.calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: calc(var(--grid) * 4);
}
.cal-dow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
  text-align: center;
  padding: 8px 0;
}
.cal-day {
  aspect-ratio: 1;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-mono);
  position: relative;
}
.cal-day:hover { border-color: var(--line-strong); }
.cal-day.other-month { opacity: 0.3; }
.cal-day.has-session {
  background: linear-gradient(135deg, var(--accent-soft), transparent);
  border-color: var(--accent);
}
.cal-day.has-session::after {
  content: "";
  position: absolute;
  bottom: 6px;
  right: 6px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.cal-day.today {
  outline: 1px solid var(--text);
  outline-offset: -2px;
}
.cal-day.selected {
  border-color: var(--text);
  background: var(--bg-elev-2);
}
.cal-day .day-num {
  font-size: 16px;
  font-weight: 500;
}
.cal-day .day-vol {
  font-size: 10px;
  color: var(--text-dim);
  margin-top: auto;
}

.session-detail {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: calc(var(--grid) * 3);
  min-height: 100px;
}
.session-detail h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 24px;
  letter-spacing: 2px;
}
.session-detail .detail-ex { padding: 8px 0; border-bottom: 1px solid var(--line); }
.session-detail .detail-ex:last-child { border-bottom: 0; }
.session-detail .detail-ex-name {
  font-family: var(--font-display);
  letter-spacing: 1.5px;
  font-size: 16px;
}
.session-detail .detail-ex-sets {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}

/* ----- Progress / Charts ----- */
.pr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--grid);
  margin-bottom: calc(var(--grid) * 4);
}
.pr-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.pr-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
}
.pr-value {
  font-family: var(--font-display);
  font-size: 36px;
  letter-spacing: 1px;
  color: var(--text);
  margin-top: 4px;
  line-height: 1;
}
.pr-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  margin-top: 6px;
}

.chart-wrap {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: calc(var(--grid) * 3);
  margin-bottom: calc(var(--grid) * 3);
}
.chart-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 2px;
}
canvas { width: 100%; height: auto; display: block; }

/* ----- Library ----- */
.lib-controls { display: flex; gap: var(--grid); }

.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--grid);
  margin-bottom: calc(var(--grid) * 4);
}
.lib-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.15s;
}
.lib-card:hover { border-color: var(--line-strong); }
.lib-card .lib-name {
  font-family: var(--font-display);
  letter-spacing: 1.5px;
  font-size: 18px;
}
.lib-card .lib-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  text-transform: uppercase;
}
.lib-card .lib-tag {
  display: inline-block;
  padding: 2px 6px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: 2px;
  margin-right: 4px;
}
.lib-card .lib-tag.custom { color: var(--accent); border-color: var(--accent); }

.add-custom {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: calc(var(--grid) * 3);
}
.add-custom h3 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 2px;
}
.add-custom-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr auto;
  gap: var(--grid);
}

/* ----- Modal ----- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}
.modal-panel {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  width: min(520px, 90vw);
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  padding: calc(var(--grid) * 3);
  gap: var(--grid) * 2;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--grid);
}
.modal-head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 2px;
}
.picker-list {
  margin-top: var(--grid);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 50vh;
}
.picker-item {
  padding: 10px 14px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.1s;
}
.picker-item:hover { border-color: var(--accent); background: var(--bg-elev); }
.picker-item .pi-name {
  font-family: var(--font-display);
  letter-spacing: 1.5px;
  font-size: 16px;
}
.picker-item .pi-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ----- Toasts ----- */
.toasts {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--bg-elev);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 1px;
  min-width: 200px;
  pointer-events: auto;
  animation: toastIn 0.25s ease;
}
.toast.success { border-left-color: var(--good); }
.toast.warn { border-left-color: var(--warn); }
.toast.error { border-left-color: var(--danger); }
@keyframes toastIn {
  from { transform: translateX(40px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ----- Responsive ----- */
@media (max-width: 720px) {
  .topbar {
    grid-template-columns: 1fr auto;
    gap: var(--grid);
    padding: var(--grid) calc(var(--grid) * 2);
  }
  .tabs {
    grid-column: 1 / -1;
    justify-self: stretch;
    overflow-x: auto;
  }
  .tab { padding: 6px 12px; font-size: 13px; letter-spacing: 1.5px; }
  .brand h1 { font-size: 22px; }
  .view-header h2 { font-size: 36px; }
  .view-header { align-items: flex-start; }
  .session-meta { width: 100%; justify-content: space-between; }
  .stat { flex: 1; min-width: 0; padding: 8px 10px; }
  .stat-value { font-size: 24px; }
  .add-custom-row { grid-template-columns: 1fr; }
  main { padding: calc(var(--grid) * 2) calc(var(--grid) * 2); }
}