/* Koach — clean, athletic, unisex, mobile-first. */
:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #1b2330;
  --muted: #69727f;
  --line: #e4e8ec;
  --brand: #117a8b;        /* deep teal */
  --brand-ink: #ffffff;
  --brand-soft: #e1f0f2;
  --accent: #f0894b;       /* warm coral */
  --good: #2f9e6a;
  --rest: #8a8f98;
  --radius: 16px;
  --shadow: 0 2px 14px rgba(20, 35, 50, 0.08);
  --maxw: 640px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 20px 16px 80px; }

header.topbar {
  position: sticky; top: 0; z-index: 5;
  background: var(--bg); border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 12px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.logo { font-weight: 800; letter-spacing: -0.02em; font-size: 1.05rem; }
.logo span { color: var(--brand); }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.lang-toggle { display: inline-flex; gap: 4px; }
.lang-btn {
  border: 1.5px solid var(--line); background: #fff; color: var(--muted);
  border-radius: 999px; padding: 4px 10px; font-size: 0.8rem; font-weight: 700;
  font-family: inherit; cursor: pointer; min-height: auto; line-height: 1.4;
}
.lang-btn.active { background: var(--brand-soft); border-color: var(--brand); color: var(--brand); }

h1 { font-size: 1.5rem; letter-spacing: -0.02em; margin: 0 0 6px; }
h2 { font-size: 1.15rem; letter-spacing: -0.01em; margin: 0 0 4px; }
.sub { color: var(--muted); margin: 0 0 20px; }

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px; margin-bottom: 14px;
}

label { display: block; font-weight: 600; font-size: 0.92rem; margin: 14px 0 6px; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 12px 14px; font-size: 1rem; color: var(--ink);
  background: #fff; border: 1.5px solid var(--line); border-radius: 12px;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--brand); }
textarea { min-height: 70px; resize: vertical; }
.hint { color: var(--muted); font-size: 0.82rem; margin-top: 4px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; min-height: 50px; padding: 12px 18px;
  font-size: 1rem; font-weight: 700; font-family: inherit; cursor: pointer;
  border: none; border-radius: 12px; background: var(--brand); color: var(--brand-ink);
  transition: filter .15s ease;
}
.btn:hover { filter: brightness(1.05); }
.btn:disabled { opacity: .55; cursor: default; }
.btn.secondary { background: var(--brand-soft); color: var(--brand); }
.btn.ghost { background: transparent; color: var(--brand); min-height: auto; width: auto; padding: 6px 4px; }
.btn-row { display: flex; gap: 10px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 14px; min-height: 44px; border-radius: 999px; cursor: pointer;
  border: 1.5px solid var(--line); background: #fff; color: var(--ink);
  font-size: 0.92rem; user-select: none;
}
.chip[aria-pressed="true"] { background: var(--brand-soft); border-color: var(--brand); color: var(--brand); font-weight: 600; }

.error { background: #fdecec; color: #b3261e; border: 1px solid #f6c9c5;
  border-radius: 10px; padding: 10px 12px; font-size: 0.9rem; margin: 10px 0; }

.steps { display: flex; gap: 6px; margin-bottom: 16px; }
.steps .dot { flex: 1; height: 6px; border-radius: 999px; background: var(--line); }
.steps .dot.active { background: var(--brand); }
.steps .dot.done { background: var(--accent); }

/* progress / generating */
.gen { text-align: center; padding: 30px 10px; }
.bar { height: 10px; border-radius: 999px; background: var(--line); overflow: hidden; margin: 18px 0 8px; }
.bar > i { display: block; height: 100%; width: 30%; background: var(--brand);
  border-radius: 999px; animation: slide 1.3s ease-in-out infinite; }
@keyframes slide { 0%{margin-left:-30%} 100%{margin-left:100%} }

/* program viewer */
.progress-summary { display:flex; align-items:center; gap:14px; }
.ring { font-weight: 800; font-size: 1.4rem; color: var(--brand); }
.daygrid { display: grid; gap: 12px; }
.day {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.day.done { border-color: #cfe9da; background: #f6fbf8; }
.day-head {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px; cursor: pointer;
}
.day-num {
  flex: 0 0 auto; width: 40px; height: 40px; border-radius: 12px;
  display: grid; place-items: center; font-weight: 800;
  background: var(--brand-soft); color: var(--brand);
}
.day.rest .day-num { background: #eef0f2; color: var(--rest); }
.day.done .day-num { background: var(--good); color: #fff; }
.day-meta { flex: 1; min-width: 0; }
.day-title { font-weight: 700; }
.day-tag { font-size: 0.78rem; color: var(--muted); text-transform: capitalize; }
.chev { color: var(--muted); transition: transform .2s ease; }
.day.open .chev { transform: rotate(90deg); }
[dir="rtl"] .chev { transform: scaleX(-1); }
[dir="rtl"] .day.open .chev { transform: rotate(90deg); }

.day-body { display: none; padding: 0 16px 16px; }
.day.open .day-body { display: block; }
.why { background: var(--brand-soft); color: #0d5560; border-radius: 12px; padding: 12px 14px; margin: 4px 0 14px; font-size: 0.95rem; }
.why b { color: var(--brand); }

.ex { border-top: 1px solid var(--line); padding: 14px 0; }
.ex:first-child { border-top: none; }
.ex-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.ex-name { font-weight: 700; }
.ex-dose { color: var(--brand); font-weight: 700; white-space: nowrap; }
.ex-sub { color: var(--muted); font-size: 0.85rem; margin-top: 2px; }
.cues { margin: 8px 0 0; padding-inline-start: 18px; color: var(--ink); font-size: 0.9rem; }
.cues li { margin: 2px 0; }
.video { margin-top: 10px; }
.video iframe { width: 100%; aspect-ratio: 16/9; border: 0; border-radius: 12px; background:#000; }
.watch {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 8px;
  padding: 9px 14px; border-radius: 10px; background: #fff; border: 1.5px solid var(--line);
  color: var(--brand); font-weight: 600; text-decoration: none; font-size: 0.9rem;
}

.complete-row { margin-top: 14px; }
.day.rest .complete-row { display: none; }

footer.note { text-align:center; color: var(--muted); font-size: 0.8rem; margin-top: 24px; }
.demo-banner { background: #fff6e6; border: 1px solid #f0dcae; color: #7a5a16;
  border-radius: 10px; padding: 10px 12px; font-size: 0.85rem; margin-bottom: 14px; }
.center { text-align: center; }
.hidden { display: none !important; }
.equip-details { margin-top: 6px; }
.equip-detail { margin-top: 10px; padding-inline-start: 10px; border-inline-start: 3px solid var(--brand-soft); }
.equip-detail label { margin: 4px 0 4px; font-size: 0.85rem; color: var(--muted); }
.equip-detail input { margin-bottom: 2px; }
.add-row { display: flex; gap: 8px; margin-top: 8px; }
.add-row input { flex: 1; }
.add-row .add-btn { white-space: nowrap; padding: 0 18px; width: auto; }
/* Per-exercise feedback */
.fb { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--line); }
.fb-label { font-size: 0.8rem; color: var(--muted); }
.fb-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.fb-btn { font-size: 0.85rem; }
.fb-note { margin-top: 6px; font-size: 0.8rem; color: var(--good); }
.adjusted {
  display: inline-block; vertical-align: middle; margin-inline-start: 6px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.02em;
  padding: 1px 7px; border-radius: 999px;
  background: var(--brand-soft); color: var(--brand);
}
.adjusted.down { background: #fdeee4; color: #b5631f; }
#gen-msg { min-height: 2.6em; font-style: italic; }
.fade-in { animation: fadeIn 0.5s ease both; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }