:root {
  --bg: #0B0D10;
  --bg-elev: #15181D;
  --bg-elev-2: #1E2228;
  --border: #2A2F37;
  --text: #F2F4F6;
  --text-dim: #9BA3AE;
  --accent: #C6FF3D;
  --accent-dim: #7FA82A;
  --danger: #FF5D5D;
  --radius: 16px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  overscroll-behavior-y: none;
}

body { -webkit-user-select: none; user-select: none; }
input, textarea { user-select: text; -webkit-user-select: text; }

#app {
  max-width: 560px;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}

button { font-family: inherit; cursor: pointer; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px 10px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}
.topbar h1 {
  font-size: 22px;
  margin: 0;
  flex: 1;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.iconbtn {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.iconbtn:active { background: var(--bg-elev-2); }
.backbtn {
  background: none;
  border: none;
  color: var(--text);
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 4px 8px 0;
  flex-shrink: 0;
}

.content { flex: 1; padding: 8px 16px 32px; overflow-y: auto; }

/* ---------- empty state ---------- */
.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 10px;
  padding: 80px 24px;
  color: var(--text-dim);
}
.empty .big { font-size: 40px; }
.empty h2 { color: var(--text); margin: 0; font-size: 18px; }
.empty p { margin: 0; font-size: 14px; line-height: 1.5; }

/* ---------- primary button ---------- */
.btn-primary {
  background: var(--accent);
  color: #0B0D10;
  border: none;
  border-radius: 14px;
  padding: 15px 20px;
  font-size: 16px;
  font-weight: 700;
  width: 100%;
}
.btn-primary:active { background: var(--accent-dim); }
.btn-secondary {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 14px;
  padding: 15px 20px;
  font-size: 15px;
  font-weight: 600;
  width: 100%;
}
.btn-ghost {
  background: none;
  border: none;
  color: var(--accent);
  font-weight: 600;
  font-size: 15px;
  padding: 10px 4px;
}

/* ---------- course cards (home) ---------- */
.course-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  position: relative;
}
.course-card .name { font-size: 17px; font-weight: 700; margin: 0 0 4px; }
.course-card .meta { color: var(--text-dim); font-size: 13px; margin: 0; }
.course-card .row { display: flex; gap: 8px; margin-top: 14px; }
.course-card .row button { flex: 1; }
.course-card .menubtn {
  position: absolute; top: 12px; right: 12px;
  background: none; border: none; color: var(--text-dim); font-size: 20px;
  padding: 6px 10px;
}

.fab-add {
  margin-top: 4px;
}

/* ---------- day list (course view) ---------- */
.day-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.day-card .thumb {
  width: 52px; height: 52px; border-radius: 10px; background: var(--bg-elev-2);
  object-fit: cover; flex-shrink: 0; border: 1px solid var(--border);
}
.day-card .info { flex: 1; min-width: 0; }
.day-card .info .name { font-size: 16px; font-weight: 700; margin: 0 0 2px; white-space: nowrap; text-overflow: ellipsis; overflow: hidden; }
.day-card .info .sub { color: var(--text-dim); font-size: 13px; margin: 0; }
.day-card .start {
  background: var(--accent);
  color: #0B0D10;
  border: none;
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

/* ---------- editor ---------- */
.field-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin: 18px 0 8px;
  font-weight: 700;
}
.text-input {
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 12px;
  padding: 14px;
  font-size: 16px;
  outline: none;
}
.text-input:focus { border-color: var(--accent); }

.day-block {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 14px;
}
.day-block-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.day-block-head input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 16px;
  font-weight: 700;
  padding: 6px 2px;
  outline: none;
}
.day-block-head .order-controls { display: flex; gap: 2px; }
.tinybtn {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 30px; height: 30px;
  border-radius: 8px;
  font-size: 13px;
  display: flex; align-items: center; justify-content: center;
}
.tinybtn.danger { color: var(--danger); }

.workout-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 4px;
  border-top: 1px solid var(--border);
}
.workout-row:first-of-type { border-top: none; }
.workout-row .thumb-btn {
  width: 48px; height: 48px;
  border-radius: 10px;
  border: 1px dashed var(--border);
  background: var(--bg-elev-2);
  flex-shrink: 0;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-dim);
  font-size: 18px;
}
.workout-row .thumb-btn img { width: 100%; height: 100%; object-fit: cover; }
.workout-row .fields { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.workout-row .fields input {
  background: transparent; border: none; color: var(--text);
  font-size: 15px; padding: 2px; outline: none; width: 100%;
}
.workout-row .fields input.note { font-size: 13px; color: var(--text-dim); }
.workout-row .fields input.wname { font-weight: 600; }

.add-workout-btn {
  display: flex; align-items: center; gap: 8px;
  background: none; border: none; color: var(--accent);
  font-weight: 600; font-size: 14px; padding: 10px 4px 2px; width: 100%;
}

/* ---------- day player (fullscreen) ---------- */
.player {
  position: fixed; inset: 0; background: #000; z-index: 50;
  display: flex; flex-direction: column;
  padding-top: var(--safe-top); padding-bottom: var(--safe-bottom);
}
.player-top {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; color: #fff; z-index: 2;
}
.player-top .progress { font-size: 14px; color: rgba(255,255,255,0.7); font-weight: 600; }
.player-close {
  background: rgba(255,255,255,0.12); border: none; color: #fff;
  width: 36px; height: 36px; border-radius: 10px; font-size: 16px;
}
.player-stage {
  flex: 1;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  touch-action: pan-y;
}
.player-stage img {
  max-width: 100%; max-height: 100%; object-fit: contain;
  border-radius: 4px;
}
.player-stage .no-image {
  color: rgba(255,255,255,0.35); font-size: 15px; text-align: center; padding: 0 40px;
}
.player-bar {
  height: 4px; background: rgba(255,255,255,0.15); margin: 0 16px; border-radius: 2px; overflow: hidden;
}
.player-bar-fill { height: 100%; background: var(--accent); transition: width 0.2s ease; }
.player-bottom {
  padding: 16px;
}
.player-name { color: #fff; font-size: 20px; font-weight: 700; margin: 4px 0 2px; text-align: center; }
.player-note { color: rgba(255,255,255,0.6); font-size: 14px; text-align: center; margin: 0 0 16px; min-height: 18px; }
.player-controls { display: flex; gap: 10px; }
.player-controls button {
  flex: 1;
  padding: 16px;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 700;
  border: none;
}
.player-controls .prev { background: rgba(255,255,255,0.1); color: #fff; }
.player-controls .prev:disabled { opacity: 0.3; }
.player-controls .next { background: var(--accent); color: #0B0D10; }

.player-done {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #fff; gap: 16px; padding: 0 30px; text-align: center;
}
.player-done .check { font-size: 52px; }
.player-done h2 { margin: 0; }
.player-done button { width: 100%; }

/* ---------- sheet / menu ---------- */
.overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 40;
  display: flex; align-items: flex-end;
}
.sheet {
  background: var(--bg-elev); width: 100%; border-radius: 20px 20px 0 0;
  padding: 10px 16px calc(20px + var(--safe-bottom));
  max-width: 560px; margin: 0 auto;
}
.sheet-item {
  width: 100%; text-align: left; background: none; border: none;
  color: var(--text); font-size: 16px; padding: 16px 4px; border-top: 1px solid var(--border);
}
.sheet-item:first-child { border-top: none; }
.sheet-item.danger { color: var(--danger); }

.toast {
  position: fixed; bottom: calc(24px + var(--safe-bottom)); left: 50%; transform: translateX(-50%);
  background: var(--bg-elev-2); color: var(--text); padding: 12px 18px; border-radius: 12px;
  font-size: 14px; border: 1px solid var(--border); z-index: 60; max-width: 80%; text-align: center;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #F5F6F8;
    --bg-elev: #FFFFFF;
    --bg-elev-2: #EEF0F3;
    --border: #E2E5E9;
    --text: #14171B;
    --text-dim: #6B7280;
    --accent: #6EA300;
    --accent-dim: #547C00;
  }
  .btn-primary { color: #fff; }
  .day-card .start { color: #fff; }
  .player-controls .next { color: #fff; }
}