/* ============================================================
   TrainerCMS — Design System
   Identity: clinical measurement — calipers, tick-mark rulers,
   tabular data. Not a generic gym or SaaS look.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* Color */
  --paper: #F3F1EC;
  --surface: #FFFFFF;
  --ink: #20242B;
  --ink-soft: #5B6270;
  --line: #DDD8CB;
  --teal: #24616B;
  --teal-deep: #163F47;
  --teal-tint: #E4EDEC;
  --brass: #B98A3D;
  --brass-tint: #F3E8D4;
  --alert: #AE4B3C;
  --alert-tint: #F5E2DE;
  --good: #4C7A52;
  --good-tint: #E3ECE2;

  /* Type */
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --radius: 6px;
  --shadow: 0 1px 2px rgba(32,36,43,0.06), 0 4px 14px rgba(32,36,43,0.05);
}

[data-theme="dark"] {
  --paper: #1B1D21;
  --surface: #24262B;
  --ink: #E8E6E1;
  --ink-soft: #A0A6B0;
  --line: #35383E;
  --teal: #3D8A93;
  --teal-deep: #14282B;
  --teal-tint: #1A3438;
  --brass: #D9A455;
  --brass-tint: #3A2F1C;
  --alert: #D9695A;
  --alert-tint: #3A2420;
  --good: #6FA876;
  --good-tint: #23301F;
  --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 4px 14px rgba(0,0,0,0.25);
}
[data-theme="dark"] .fc { --fc-today-bg-color: #3A2F1C; }
[data-theme="dark"] input[type=text], [data-theme="dark"] input[type=email], [data-theme="dark"] input[type=password],
[data-theme="dark"] input[type=number], [data-theme="dark"] input[type=date], [data-theme="dark"] input[type=time],
[data-theme="dark"] select, [data-theme="dark"] textarea { background: #2C2F35; color: var(--ink); }
[data-theme="dark"] .auth-wrap { background: #0F1113; }

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0 0 4px;
  color: var(--ink);
}
h1 { font-size: 34px; }
h2 { font-size: 24px; }
h3 { font-size: 19px; }

.mono, .stat, table td.num, .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

p { margin: 0 0 10px; color: var(--ink-soft); }

/* ---------- Tick-ruler divider (signature element) ---------- */
.tick-rule {
  position: relative;
  height: 14px;
  margin: 6px 0 20px;
  background-image: repeating-linear-gradient(
    to right,
    var(--line) 0, var(--line) 1px,
    transparent 1px, transparent 12px
  );
  background-position: bottom left;
  background-size: 100% 10px;
  background-repeat: repeat-x;
  border-bottom: 1.5px solid var(--ink);
}
.tick-rule.accent { border-bottom-color: var(--teal); }

/* ---------- Layout shell ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 232px;
  flex-shrink: 0;
  background: var(--teal-deep);
  color: #F3F1EC;
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
}
.sidebar .brand {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  margin-bottom: 4px;
}
.sidebar .brand small {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: #9FC1C4;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}
.sidebar nav { margin-top: 26px; display: flex; flex-direction: column; gap: 2px; }
.sidebar nav a {
  color: #D7E6E5;
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  padding: 9px 12px;
  border-radius: var(--radius);
  border-left: 3px solid transparent;
  display: flex;
  align-items: center;
  gap: 9px;
}
.sidebar nav a:hover { background: rgba(255,255,255,0.06); }
.sidebar nav a.active {
  background: rgba(255,255,255,0.10);
  border-left-color: var(--brass);
  color: #fff;
}
.sidebar .user-box {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 13px;
}
.sidebar .user-box .name { color: #fff; font-weight: 600; }
.sidebar .user-box .role { font-family: var(--font-mono); font-size: 11px; color: #9FC1C4; text-transform: uppercase; letter-spacing: 0.06em; }
.sidebar .user-box a { color: #C6D9D8; font-size: 12.5px; }

.main { flex: 1; min-width: 0; padding: 28px 36px 60px; }
.topbar { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 6px; flex-wrap: wrap; gap: 10px; }
.topbar .eyebrow { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.09em; color: var(--brass); margin-bottom: 2px; }

/* ---------- Mobile nav toggle (hidden on desktop) ---------- */
.mobile-nav-toggle {
  display: none;
  position: fixed; top: 12px; left: 12px; z-index: 60;
  width: 42px; height: 42px;
  background: var(--teal-deep); border: none; border-radius: 8px;
  flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  cursor: pointer;
}
.mobile-nav-toggle span { display: block; width: 20px; height: 2px; background: #fff; border-radius: 2px; }
.mobile-nav-scrim { display: none; }

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: 18px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1000px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.card.tight { padding: 14px 16px; }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.card-head h3 { margin: 0; }

.metric-card .value { font-family: var(--font-mono); font-size: 30px; font-weight: 600; color: var(--teal-deep); line-height: 1.1; }
.metric-card .label { font-size: 12.5px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 4px; }
.metric-card .delta { font-family: var(--font-mono); font-size: 13px; margin-top: 6px; }
.metric-card .delta.down { color: var(--good); }
.metric-card .delta.up { color: var(--alert); }

/* ---------- Caliper progress bar (signature element) ---------- */
.caliper {
  position: relative;
  height: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  overflow: hidden;
  background-image: repeating-linear-gradient(to right, var(--line) 0, var(--line) 1px, transparent 1px, transparent 10%);
}
.caliper .fill {
  position: absolute; top: 0; left: 0; bottom: 0;
  background: linear-gradient(90deg, var(--teal), var(--teal-deep));
}
.caliper.warn .fill { background: linear-gradient(90deg, var(--brass), #96692A); }
.caliper.danger .fill { background: linear-gradient(90deg, var(--alert), #8B392C); }
.caliper .tick-label {
  position: absolute; right: 6px; top: 1px;
  font-family: var(--font-mono); font-size: 10.5px; color: var(--ink);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-body); font-weight: 600; font-size: 13.5px;
  padding: 9px 15px; border-radius: var(--radius);
  border: 1px solid var(--teal-deep);
  background: var(--teal); color: #fff;
  cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--teal-deep); text-decoration: none; }
.btn.secondary { background: var(--surface); color: var(--ink); border-color: var(--line); }
.btn.secondary:hover { background: var(--paper); }
.btn.danger { background: var(--alert); border-color: #8B392C; }
.btn.danger:hover { background: #8B392C; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Forms ---------- */
label { display: block; font-size: 12.5px; font-weight: 600; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 5px; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=date], input[type=time], select, textarea {
  width: 100%; font-family: var(--font-body); font-size: 14.5px;
  padding: 9px 11px; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--teal); outline-offset: 1px; border-color: var(--teal);
}
.field { margin-bottom: 14px; }
.field-row { display: flex; gap: 12px; }
.field-row .field { flex: 1; }
fieldset { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; margin: 0 0 16px; }
legend { font-family: var(--font-display); font-size: 15px; padding: 0 6px; }

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-soft); padding: 8px 10px; border-bottom: 1.5px solid var(--ink); }
td { padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
td.num { text-align: right; }
th.num { text-align: right; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block; font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 3px 8px; border-radius: 3px; font-weight: 600;
}
.badge.good { background: var(--good-tint); color: var(--good); }
.badge.warn { background: var(--brass-tint); color: #8A621C; }
.badge.danger { background: var(--alert-tint); color: var(--alert); }
.badge.neutral { background: var(--paper); color: var(--ink-soft); border: 1px solid var(--line); }

/* ---------- Alerts / flash ---------- */
.alert { padding: 11px 14px; border-radius: var(--radius); font-size: 13.5px; margin-bottom: 16px; border: 1px solid transparent; }
.alert.success { background: var(--good-tint); color: #2E4A31; border-color: #C4D6C4; }
.alert.error { background: var(--alert-tint); color: var(--alert); border-color: #E3C0B9; }

/* ---------- Auth screen ---------- */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--teal-deep); padding: 20px; }
.auth-card { width: 100%; max-width: 380px; background: var(--surface); border-radius: 8px; padding: 34px 30px; box-shadow: 0 20px 60px rgba(0,0,0,0.35); }
.auth-card .brand { font-family: var(--font-display); font-size: 26px; font-weight: 700; color: var(--teal-deep); margin-bottom: 2px; }
.auth-card .brand small { display: block; font-family: var(--font-mono); font-size: 11px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.08em; margin: 4px 0 22px; }

/* ---------- Calendar (FullCalendar overrides) ---------- */
.fc { --fc-border-color: var(--line); --fc-today-bg-color: var(--brass-tint); font-family: var(--font-body); }
.fc .fc-toolbar-title { font-family: var(--font-display); font-size: 22px; }
.fc .fc-button { background: var(--teal); border-color: var(--teal-deep); text-transform: capitalize; box-shadow: none !important; }
.fc .fc-button:hover { background: var(--teal-deep); }
.fc .fc-button-primary:disabled { background: var(--ink-soft); }
.fc-event { border: none; font-size: 11.5px; padding: 1px 3px; }
.fc-event.ev-workout-completed { background: var(--good); }
.fc-event.ev-workout-planned { background: var(--teal); }
.fc-event.ev-workout-accepted { background: var(--teal); }
.fc-event.ev-workout-proposed { background: var(--brass); }
.fc-event.ev-workout-skipped { background: var(--ink-soft); }
.fc-event.ev-pass { background: var(--brass); }
.fc-event.ev-workhours { background: #8C97A6; }

/* ---------- Misc ---------- */
.muted { color: var(--ink-soft); font-size: 13px; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--ink-soft); }
.empty-state h3 { color: var(--ink); }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.stack { display: flex; flex-direction: column; gap: 10px; }
.chip-list { display: flex; flex-wrap: wrap; gap: 8px; }

/* ============================================================
   Responsive — tablet & mobile, tuned for iPhone 14/14 Pro/Plus
   (390–430px viewport widths) and up.
   ============================================================ */
@media (max-width: 860px) {
  .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
  .grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .mobile-nav-toggle { display: flex; }

  .app-shell { display: block; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0; z-index: 65;
    width: 78vw; max-width: 300px;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    overflow-y: auto;
    box-shadow: 4px 0 24px rgba(0,0,0,0.25);
  }
  .app-shell.sidebar-open .sidebar { transform: translateX(0); }
  .app-shell.sidebar-open .mobile-nav-scrim {
    display: block; position: fixed; inset: 0; background: rgba(20,22,26,0.45); z-index: 62;
  }

  .main { padding: 64px 16px 40px; }
  h1 { font-size: 26px; }
  h2 { font-size: 20px; }

  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }

  .card { padding: 14px 15px; }
  .card-head { flex-wrap: wrap; gap: 6px; }

  .field-row { flex-direction: column; gap: 0; }
  .field-row .field { width: 100%; }

  /* Comfortable ≥44px touch targets throughout, per iOS HIG */
  .btn { padding: 11px 16px; font-size: 14.5px; }
  .btn.sm { padding: 9px 13px; font-size: 13px; }
  input[type=text], input[type=email], input[type=password], input[type=number],
  input[type=date], input[type=time], select, textarea {
    font-size: 16px; /* prevents iOS Safari auto-zoom on focus */
    padding: 11px 12px;
  }

  table { display: block; overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch; }

  .metric-card .value { font-size: 24px; }

  .auth-card { padding: 26px 20px; }

  /* Calendar day/event modals: near-full-width with safe margins */
  #dayModal .card, #eventModal .card { max-width: 92vw !important; }

  .fc .fc-toolbar { flex-direction: column; gap: 8px; align-items: stretch; }
  .fc .fc-toolbar-title { font-size: 18px; text-align: center; }
  .fc .fc-button { padding: 8px 10px; font-size: 13px; }
}

@media (max-width: 430px) {
  .main { padding: 60px 12px 36px; }
  h1 { font-size: 23px; }
  .card { padding: 12px; }
  .topbar .eyebrow { font-size: 11px; }
}