/* =========================================================
   IRON LOG — design tokens
   A weight room at 6am: rubber flooring, chalk dust, hazard
   tape on the rig, plates stamped with their own numbers.
   ========================================================= */
:root {
  --bg: #131314;
  --bg-floor: #0F0F10;
  --surface: #1C1D1F;
  --surface-raised: #232427;
  --border: #313236;
  --border-strong: #45474D;

  --text: #F3F1EC;
  --text-muted: #8D8F94;
  --text-faint: #5C5E63;

  --accent: #FF5A1F;      /* hazard orange — plates, tape, warning stencils */
  --accent-dim: #A83D16;
  --accent-glow: rgba(255, 90, 31, 0.18);

  --pr-green: #4FBE79;    /* chalk-mark PR stamp */
  --pr-green-glow: rgba(79, 190, 121, 0.16);
  --danger: #E5484D;

  --font-display: 'Bebas Neue', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 3px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

/* Faint rubber-flooring speckle + a top-down floodlight vignette,
   so the black never reads as flat/default. */
body {
  background-image:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(255, 90, 31, 0.05), transparent 60%),
    repeating-linear-gradient(115deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 3px),
    repeating-linear-gradient(25deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 3px);
  background-color: var(--bg);
  background-attachment: fixed;
}

.hidden { display: none !important; }

button, input, select {
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
}

button { cursor: pointer; }

button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

::selection { background: var(--accent-glow); color: var(--text); }

/* ---------- Brand ---------- */
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  justify-content: center;
}
.brand-mark {
  color: var(--accent);
  font-size: 0.9rem;
  line-height: 1;
  transform: rotate(45deg);
  display: inline-block;
}
.brand h1 {
  font-family: var(--font-display);
  font-size: 2.1rem;
  letter-spacing: 0.12em;
  margin: 0;
  font-weight: 400;
}
.brand-sm { justify-content: flex-start; }
.brand-sm h1 { font-size: 1.35rem; }

/* ---------- Auth view ---------- */
#auth-view {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  position: relative;
}
.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.75rem 2rem 2.25rem;
  position: relative;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.6);
}
/* hazard strip along the top edge of the card — the one place
   the diagonal warning-tape motif shows up at full strength */
.auth-card::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px; right: -1px;
  height: 4px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: repeating-linear-gradient(
    -45deg,
    var(--accent) 0px, var(--accent) 8px,
    var(--bg-floor) 8px, var(--bg-floor) 16px
  );
}
.brand-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
  margin: 0.6rem 0 2rem;
  letter-spacing: 0.01em;
}
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.6rem;
}
.tab-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 0.7rem 0;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

/* ---------- Form elements ---------- */
label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.optional {
  color: var(--text-faint);
  font-weight: 500;
  font-size: 0.7rem;
  text-transform: none;
  letter-spacing: normal;
}
input, select {
  background: var(--bg-floor);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.68rem 0.75rem;
  color: var(--text);
  width: 100%;
  min-width: 0;
  font-weight: 500;
  transition: border-color 0.15s var(--ease), background 0.15s var(--ease);
}
input:hover, select:hover { border-color: var(--border-strong); }
input:focus, select:focus { background: #17181a; }
input::placeholder { color: var(--text-faint); }
select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-muted) 50%),
                     linear-gradient(135deg, var(--text-muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) center, calc(100% - 13px) center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 2.2rem;
  cursor: pointer;
}

/* Numeric inputs read like plate/rep counters on a machine —
   tabular mono, no spinner clutter */
input[type="number"] {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  appearance: textfield;      /* Standard property */
  -moz-appearance: textfield; /* Firefox fallback */
}
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  margin-left: 4px;
  opacity: 0.5;
}
input[type="date"] { font-family: var(--font-mono); }

.btn-primary, .btn-secondary, .btn-ghost {
  border-radius: var(--radius);
  padding: 0.72rem 1.25rem;
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.1s var(--ease), background 0.15s var(--ease), border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.btn-primary {
  background: var(--accent);
  color: #171717;
  border: none;
  box-shadow: 0 1px 0 rgba(255,255,255,0.15) inset;
}
.btn-primary:hover { background: #ff7440; box-shadow: 0 4px 16px -4px var(--accent-glow), 0 1px 0 rgba(255,255,255,0.2) inset; }
.btn-primary:active { transform: scale(0.98); }

.btn-secondary {
  background: transparent;
  border: 1px solid var(--accent-dim);
  color: var(--accent);
}
.btn-secondary:hover { background: var(--accent-glow); border-color: var(--accent); }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: normal;
  font-weight: 600;
}
.btn-ghost:hover { color: var(--text); border-color: var(--border-strong); }

.form-error {
  color: var(--danger);
  font-size: 0.83rem;
  min-height: 1.2em;
  margin: 0;
  font-weight: 500;
}

/* ---------- App shell ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  flex-wrap: wrap;
  background: linear-gradient(var(--surface), transparent);
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(6px);
}
.topnav {
  display: flex;
  gap: 0.3rem;
  background: var(--bg-floor);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.25rem;
}
.nav-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.45rem 1rem;
  border-radius: 2px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color 0.15s var(--ease), background 0.15s var(--ease);
}
.nav-btn:hover { color: var(--text); }
.nav-btn.active {
  color: #171717;
  background: var(--accent);
}
.content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 1.5rem 5rem;
}
/* Every panel except Sessions keeps the original single-column width;
   Sessions alone uses the extra room for the list + calendar sidebar. */
.panel:not(#sessions-panel) {
  max-width: 780px;
  margin: 0 auto;
}
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.6rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.panel-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  letter-spacing: 0.05em;
  font-weight: 400;
  margin: 0;
  position: relative;
  padding-left: 0.9rem;
}
.panel-header h2::before {
  content: '';
  position: absolute;
  left: 0; top: 0.2em; bottom: 0.2em;
  width: 4px;
  background: var(--accent);
  border-radius: 2px;
}

/* ---------- Sessions layout (list + calendar sidebar) ---------- */
.sessions-layout {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
}
.sessions-main {
  flex: 1;
  min-width: 0;
}
.sessions-sidebar {
  width: 220px;
  flex-shrink: 0;
  position: sticky;
  top: 5.5rem;
}

/* ---------- Calendar (compact) ---------- */
.calendar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 0.9rem 1rem;
}
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}
.calendar-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  font-weight: 400;
}
.cal-nav-btn {
  background: var(--bg-floor);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 22px;
  height: 22px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  cursor: pointer;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease), background 0.15s var(--ease);
}
.cal-nav-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface-raised); }

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  margin-bottom: 0.25rem;
}
.calendar-weekdays span {
  text-align: center;
  font-size: 0.58rem;
  font-weight: 700;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 2px;
}
.calendar-day {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  border-radius: 2px;
  border: 1px solid transparent;
}
.calendar-day.is-empty { visibility: hidden; }

.calendar-day.has-session {
  color: var(--text);
  font-weight: 700;
  background: var(--accent-glow);
  border-color: var(--accent-dim);
  cursor: pointer;
  transition: background 0.15s var(--ease), border-color 0.15s var(--ease), transform 0.1s var(--ease);
}
.calendar-day.has-session:hover {
  background: rgba(255, 90, 31, 0.28);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.calendar-day.has-session::after {
  content: '';
  position: absolute;
  bottom: 2px;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--accent);
}

.calendar-day.is-today {
  border-color: var(--border-strong);
}
.calendar-day.is-today::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 2px;
  border: 1px dashed var(--text-faint);
}

.calendar-legend {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.65rem;
  font-size: 0.6rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}
.legend-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

/* ---------- Sessions list ---------- */
.sessions-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.session-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: border-color 0.15s var(--ease), transform 0.12s var(--ease), background 0.15s var(--ease);
}
.session-card:hover {
  border-color: var(--accent-dim);
  border-left-color: var(--accent);
  background: var(--surface-raised);
  transform: translateX(2px);
}
.session-card-date {
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.session-card-notes {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.25rem;
}
.session-card-stats {
  display: flex;
  gap: 1.3rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 3.5rem 1rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}
.empty-state::before {
  content: '';
  display: block;
  width: 34px;
  height: 34px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  border: 3px solid var(--border-strong);
  box-shadow: 0 0 0 5px var(--bg), 0 0 0 6px var(--border);
  opacity: 0.6;
}

/* ---------- Modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(8, 8, 9, 0.72);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 10;
}
.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 40px 80px -20px rgba(0,0,0,0.7);
}
.modal-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.05em;
  font-size: 1.35rem;
  margin: 0 0 1.3rem;
}
.modal-card form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.modal-actions {
  display: flex;
  gap: 0.6rem;
  justify-content: flex-end;
  margin-top: 0.4rem;
}

/* ---------- Session detail ---------- */
.back-btn { margin-bottom: 1.3rem; }

.session-detail-header { margin-bottom: 1.6rem; }
.session-detail-date {
  font-family: var(--font-display);
  font-size: 2.4rem;
  letter-spacing: 0.03em;
}
.session-summary-stats {
  display: flex;
  gap: 2rem;
  margin-top: 0.6rem;
}
.stat-block .stat-value {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.stat-block .stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
}

.exercise-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem 1.3rem;
  margin-bottom: 0.9rem;
}
.exercise-group-name {
  font-weight: 700;
  margin-bottom: 0.7rem;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
}
.set-row {
  display: flex;
  gap: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.45rem 0;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  font-variant-numeric: tabular-nums;
  align-items: baseline;
}
.set-row:first-of-type { border-top: none; }
.set-row .weight-stamp {
  color: var(--text);
  font-weight: 700;
  position: relative;
}
/* PR is a chalk-marked plate stamp: small green ring + underline,
   angled slightly like it was marked by hand mid-set */
.set-row .weight-stamp.is-pr {
  color: var(--pr-green);
  padding-left: 1.1rem;
}
.set-row .weight-stamp.is-pr::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 7px; height: 7px;
  border-radius: 50%;
  border: 2px solid var(--pr-green);
  transform: translateY(-50%) rotate(-8deg);
  box-shadow: 0 0 6px var(--pr-green-glow);
}
.set-row .weight-stamp.is-pr::after {
  content: '';
  position: absolute;
  left: 1.1rem; right: -4px; bottom: -2px;
  height: 2px;
  background: var(--pr-green);
  opacity: 0.55;
  border-radius: 2px;
  transform: rotate(-1deg);
}

.add-set-card, .quick-add {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  margin-top: 1.6rem;
}
.add-set-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.05em;
  font-size: 1.25rem;
  margin: 0 0 1.1rem;
}
.set-inputs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.1rem;
}
.set-inputs label { min-width: 0; }
.set-inputs input { width: 100%; max-width: 100%; }

.quick-add summary {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  list-style: none;
}
.quick-add summary::-webkit-details-marker { display: none; }
.quick-add summary::before {
  content: '+ ';
  color: var(--accent);
}
.quick-add[open] summary::before { content: '– '; }
.quick-add summary:hover { color: var(--text); }
.quick-add form {
  display: flex;
  flex-direction: column;
  gap: 0.95rem;
  margin-top: 1.1rem;
}

/* ---------- Progress panel ---------- */
#progress-exercise-select { min-width: 200px; }

.range-toggle {
  display: inline-flex;
  gap: 0.3rem;
  background: var(--bg-floor);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.25rem;
  margin-bottom: 1.6rem;
}
.range-btn {
  background: none;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.45rem 1rem;
  border-radius: 2px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color 0.15s var(--ease), background 0.15s var(--ease);
}
.range-btn:hover { color: var(--text); }
.range-btn.active {
  color: #171717;
  background: var(--accent);
}

.progress-chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.3rem 1rem;
  margin-bottom: 1.6rem;
}
.progress-chart-card canvas {
  max-height: 260px;
}

.progress-summary {
  display: flex;
  gap: 2.2rem;
  margin-bottom: 1.7rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.pb-block .pb-value {
  font-family: var(--font-mono);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.pb-block .pb-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
  margin-top: 0.4rem;
}
.progress-history {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.progress-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  transition: border-color 0.15s var(--ease);
}
.progress-row:hover { border-color: var(--border-strong); }
.progress-row .row-date { color: var(--text-muted); }
.progress-row .row-max { font-weight: 700; color: var(--text); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-raised);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--accent);
  color: var(--text);
  padding: 0.75rem 1.3rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  z-index: 20;
  box-shadow: 0 10px 30px -6px rgba(0,0,0,0.5);
}
.toast.error { border-left-color: var(--danger); color: var(--danger); }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .set-inputs { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .topbar { padding: 0.85rem 1rem; }
  .session-card { flex-direction: column; align-items: flex-start; gap: 0.55rem; }
  .session-card-stats { flex-wrap: wrap; gap: 0.9rem; }
  .progress-summary { gap: 1.4rem; }
  .pb-block .pb-value { font-size: 2.1rem; }
  .sessions-layout { flex-direction: column; }
  .sessions-sidebar { width: 100%; position: static; order: -1; }
  .calendar-card { max-width: 260px; margin: 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}