:root {
  --ink: #13233d;
  --muted: #647089;
  --line: #dfe5ef;
  --page: #f7f8fb;
  --card: #ffffff;
  --blue: #2f80ed;
  --blue-soft: #e8f2ff;
  --green: #3b9f69;
  --green-soft: #e8f7ed;
  --orange: #e78b35;
  --orange-soft: #fff1df;
  --purple: #8760d8;
  --purple-soft: #f1eaff;
  --shadow: 0 10px 24px rgba(24, 42, 72, 0.07);
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

html { background: var(--page); }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 100% 0%, rgba(103, 168, 244, 0.13), transparent 30rem),
    var(--page);
  -webkit-font-smoothing: antialiased;
}

button, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.app-shell {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: max(10px, env(safe-area-inset-top)) 12px max(20px, env(safe-area-inset-bottom));
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  margin-bottom: 8px;
}

.brand-lockup { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 14px;
  color: #fff;
  background: var(--ink);
  box-shadow: 0 7px 18px rgba(19, 35, 61, 0.18);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(25px, 6vw, 33px); line-height: 1.05; letter-spacing: -0.045em; }

.undo-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  transition: opacity 160ms ease, transform 160ms ease, background 160ms ease;
}
.undo-button:not(:disabled):active { transform: scale(0.97); }
.undo-button:not(:disabled):hover { background: #fff; }
.undo-button:disabled { cursor: default; opacity: 0.38; }
.undo-icon { font-size: 20px; line-height: 0; }
.header-actions { display: flex; align-items: center; gap: 7px; }
.reset-button { min-height: 40px; padding: 0 12px; border: 1px solid #efcaca; border-radius: 13px; color: #a33f47; background: rgba(255, 246, 246, 0.88); cursor: pointer; font-size: 14px; font-weight: 750; transition: opacity 160ms ease, transform 160ms ease, background 160ms ease; }
.reset-button:not(:disabled):active { transform: scale(0.97); }
.reset-button:not(:disabled):hover { background: #fff0f0; }
.reset-button:disabled { cursor: default; opacity: 0.35; }
.exercise-reset-button { flex: 0 0 auto; min-height: 40px; padding: 0 10px; font-size: 12px; }

.intro-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 28px;
  padding: 15px 16px;
  border: 1px solid rgba(120, 151, 196, 0.18);
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(232, 242, 255, 0.88), rgba(255, 255, 255, 0.86));
  box-shadow: var(--shadow);
}
.intro-copy { display: flex; align-items: flex-start; gap: 10px; }
.intro-dot { flex: 0 0 auto; width: 10px; height: 10px; margin-top: 5px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 5px rgba(47, 128, 237, 0.12); }
.intro-card strong { display: block; margin-bottom: 3px; font-size: 14px; }
.intro-card p { max-width: 410px; margin-bottom: 0; color: var(--muted); font-size: 13px; line-height: 1.35; }
.offline-pill { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 6px; padding: 7px 9px; border-radius: 999px; color: #25704b; background: rgba(232, 247, 237, 0.95); font-size: 12px; font-weight: 700; white-space: nowrap; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: #37a664; }

.list-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin: 0 3px 12px; }
.list-heading h2 { margin-bottom: 0; font-size: 18px; letter-spacing: -0.02em; }
.list-heading p { margin-bottom: 0; color: var(--muted); font-size: 12px; }

.exercise-list { display: grid; gap: 8px; }
.category-section { display: grid; gap: 7px; }
.category-header { display: flex; align-items: center; gap: 8px; margin: 8px 4px 1px; }
.category-number { display: grid; width: 27px; height: 27px; place-items: center; border-radius: 9px; color: #fff; background: var(--ink); font-size: 12px; font-weight: 800; }
.category-title { margin: 0; font-size: 14px; letter-spacing: -0.01em; }
.category-note { margin-left: auto; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }

.exercise-card {
  --accent: var(--blue);
  --soft: var(--blue-soft);
  padding: 11px;
  border: 1px solid color-mix(in srgb, var(--accent) 25%, #fff);
  border-radius: 16px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--soft) 58%, #fff), #fff 70%);
  box-shadow: 0 6px 18px rgba(24, 42, 72, 0.045);
}
.exercise-card[data-tone="green"] { --accent: var(--green); --soft: var(--green-soft); }
.exercise-card[data-tone="orange"] { --accent: var(--orange); --soft: var(--orange-soft); }
.exercise-card[data-tone="purple"] { --accent: var(--purple); --soft: var(--purple-soft); }

.exercise-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.exercise-name-wrap { display: flex; align-items: flex-start; gap: 10px; min-width: 0; }
.exercise-number { flex: 0 0 auto; color: var(--accent); font-size: 12px; font-weight: 800; }
.exercise-name { margin: 0; font-size: 15px; line-height: 1.18; letter-spacing: -0.02em; }
.exercise-subtitle { margin: 2px 0 0; color: var(--muted); font-size: 11px; line-height: 1.2; }
.tag-row { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
.tag { padding: 5px 8px; border-radius: 999px; font-size: 11px; font-weight: 800; white-space: nowrap; }
.tag.push { color: #1d5fb7; background: var(--blue-soft); }
.tag.pull { color: #287247; background: var(--green-soft); }
.tag.legs { color: #a9550f; background: var(--orange-soft); }
.tag.core { color: #6840ad; background: var(--purple-soft); }

.saved-area { display: flex; align-items: end; justify-content: space-between; gap: 12px; min-height: 45px; margin: 8px 0 8px; }
.saved-label { margin-bottom: 4px; color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }
.saved-value { margin: 0; color: var(--ink); font-size: clamp(25px, 7vw, 34px); font-weight: 800; letter-spacing: -0.065em; line-height: 0.98; }
.saved-value.empty { color: #8290a6; font-size: 24px; letter-spacing: -0.035em; }
.saved-date { margin: 0 0 4px; color: var(--muted); font-size: 11px; text-align: right; }

.equivalents { display: grid; grid-template-columns: repeat(3, 1fr); gap: 5px; margin-bottom: 8px; }
.equivalent { padding: 6px 8px; border-radius: 10px; background: rgba(255,255,255,0.72); }
.equivalent-label { display: block; margin-bottom: 2px; color: var(--muted); font-size: 10px; font-weight: 700; }
.equivalent-value { display: block; color: var(--ink); font-size: 13px; font-weight: 800; }
.equivalents.empty-state { opacity: 0.55; }

.entry-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.input-wrap { position: relative; }
.input-wrap label { position: absolute; top: 50%; left: 13px; z-index: 1; color: var(--muted); font-size: 13px; font-weight: 700; pointer-events: none; transform: translateY(-50%); }
.entry-input { width: 100%; min-height: 41px; padding: 0 40px 0 48px; border: 1px solid rgba(146, 161, 185, 0.38); border-radius: 11px; outline: none; color: var(--ink); background: rgba(255, 255, 255, 0.9); font-size: 16px; font-weight: 750; transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease; }
.entry-input::placeholder { color: #a6b0c0; font-weight: 500; }
.entry-input:focus { border-color: var(--accent); background: #fff; box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 14%, transparent); }
.input-suffix { position: absolute; top: 50%; right: 13px; color: var(--muted); font-size: 12px; font-weight: 800; pointer-events: none; transform: translateY(-50%); }
.entry-status { min-height: 15px; margin: 5px 3px 0; color: var(--muted); font-size: 11px; line-height: 1.2; }
.entry-status.positive { color: #2f8658; }
.entry-status.caution { color: #a26318; }

.app-footer { display: flex; align-items: center; gap: 10px; margin: 28px 4px 0; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: 0.04em; text-align: center; }
.footer-rule { flex: 1; height: 1px; background: var(--line); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.dialog-backdrop { position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; padding: 20px; background: rgba(19, 35, 61, 0.32); backdrop-filter: blur(5px); }
.dialog-backdrop[hidden] { display: none; }
.reset-dialog { width: min(100%, 360px); padding: 22px; border: 1px solid rgba(255,255,255,0.72); border-radius: 24px; background: #fff; box-shadow: 0 24px 70px rgba(19, 35, 61, 0.22); }
.dialog-kicker { margin-bottom: 7px; color: #a33f47; font-size: 11px; font-weight: 850; letter-spacing: 0.14em; text-transform: uppercase; }
.reset-dialog h2 { margin: 0 0 8px; font-size: 23px; letter-spacing: -0.04em; }
.reset-dialog p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.45; }
.dialog-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-top: 20px; }
.dialog-actions button { min-height: 46px; border-radius: 13px; cursor: pointer; font-size: 14px; font-weight: 800; }
.dialog-cancel { border: 1px solid var(--line); color: var(--ink); background: #fff; }
.dialog-confirm { border: 1px solid #a33f47; color: #fff; background: #a33f47; }

@media (min-width: 640px) {
  .app-shell { padding-right: 24px; padding-left: 24px; }
  .exercise-list { grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; }
  .category-section { grid-column: 1 / -1; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .category-header { grid-column: 1 / -1; }
  .category-section[data-category="core"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .category-section[data-category="core"] .category-header { grid-column: 1 / -1; }
}

@media (max-width: 500px) {
  .intro-card { align-items: flex-start; flex-direction: column; }
  .offline-pill { align-self: flex-end; }
  .category-note { display: none; }
  .tag-row { max-width: 45%; }
  .header-actions { gap: 5px; }
  .undo-button, .reset-button { padding-right: 10px; padding-left: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}