:root {
  --bg: #0f1115;
  --panel: #151922;
  --panel-2: #111520;
  --text: #e7eaf0;
  --muted: #9aa3b2;
  --primary: #5b8cff;
  --primary-600: #3c6df4;
  --danger: #ef4444;
  --border: #2a3141;
  --glow: rgba(91, 140, 255, 0.45);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.bg.fx-gradient {
  position: fixed; inset: 0;
  background: radial-gradient(1200px 800px at 10% 10%, rgba(91, 140, 255, 0.15), transparent 60%),
              radial-gradient(1000px 800px at 90% 20%, rgba(255, 98, 203, 0.1), transparent 60%),
              radial-gradient(900px 700px at 50% 90%, rgba(99, 255, 204, 0.08), transparent 60%);
  pointer-events: none;
}
.bg.fx-blob { position: fixed; width: 480px; height: 480px; filter: blur(80px); opacity: 0.5; transform: translateZ(0); pointer-events: none; }
.bg.fx-blob-a { background: #5b8cff; left: -120px; top: -120px; animation: floatA 18s ease-in-out infinite; }
.bg.fx-blob-b { background: #ff62cb; right: -160px; bottom: -160px; animation: floatB 22s ease-in-out infinite; }
@keyframes floatA { 0%,100%{transform: translate(0,0);} 50%{transform: translate(60px,40px);} }
@keyframes floatB { 0%,100%{transform: translate(0,0);} 50%{transform: translate(-50px,-30px);} }

.app { display: grid; grid-template-columns: 280px 1fr; height: 100vh; }

.sidebar {
  border-right: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(21,25,34,0.9), rgba(17,21,32,0.85));
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(8px);
}
.sidebar-header { display: flex; align-items: center; gap: 8px; padding: 16px; }
.sidebar h1 { font-size: 18px; margin: 0; font-weight: 700; }
.brand { display: flex; gap: 8px; align-items: center; letter-spacing: 0.2px; }
.logo { filter: drop-shadow(0 2px 10px rgba(255,255,255,0.1)); }

.routine-list { list-style: none; margin: 0; padding: 8px; overflow-y: auto; }
.routine-list li { padding: 12px 12px; border-radius: 12px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.routine-list li:hover { background: var(--panel-2); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,0,0,0.25); }
.routine-list li.active { background: #1a2030; border: 1px solid var(--border); box-shadow: 0 8px 24px rgba(30, 60, 120, 0.25); }
.routine-item-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.routine-delete { color: #8390a8; background: transparent; border: none; cursor: pointer; }
.routine-delete:hover { color: var(--danger); }

.main { display: flex; flex-direction: column; height: 100vh; }
.main-header { border-bottom: 1px solid var(--border); background: var(--panel); padding: 12px 16px; }
.main-header { background: linear-gradient(180deg, rgba(21,25,34,0.75), rgba(21,25,34,0.4)); backdrop-filter: blur(6px); }
.main-header h2 { margin: 0 0 4px 0; font-size: 20px; }
.subtitle { margin: 0; color: var(--muted); font-size: 12px; }
.title-wrap { display: flex; flex-direction: column; gap: 2px; }
.
.mobile-controls { display: none; margin: 8px 0; }
.routine-select { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: rgba(17,21,32,0.9); color: var(--text); }

.day-tabs { display: inline-flex; gap: 8px; flex-wrap: wrap; padding: 8px 0; }
.day-tab { padding: 8px 12px; border-radius: 999px; border: 1px solid var(--border); background: rgba(17,21,32,0.8); color: var(--text); cursor: pointer; font-size: 12px; transition: background .2s ease, transform .2s ease, box-shadow .2s ease; }
.day-tab:hover { transform: translateY(-1px); background: rgba(20,24,35,0.95); }
.day-tab.active { background: linear-gradient(135deg, #6ea4ff, #8a7dff); border-color: transparent; box-shadow: 0 6px 20px rgba(91,140,255,0.35); }

.composer { padding: 16px; border-bottom: 1px solid var(--border); background: rgba(15,19,32,0.8); backdrop-filter: blur(8px); }
.composer h3 { margin: 0 0 12px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field span { color: var(--muted); font-size: 12px; }
.field input { padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border); background: linear-gradient(180deg, rgba(21,25,34,0.85), rgba(17,21,32,0.85)); color: var(--text); box-shadow: inset 0 1px 0 rgba(255,255,255,0.04); transition: border-color .2s ease, box-shadow .2s ease; }
.field input:focus { border-color: #6ea4ff; box-shadow: 0 0 0 3px rgba(91,140,255,0.2); }
.actions { margin-top: 12px; }
.actions.right { display: flex; justify-content: flex-end; gap: 8px; }

.workouts { display: grid; grid-template-columns: 1fr 440px; gap: 0; height: 100%; }
.workout-list { list-style: none; margin: 0; padding: 16px; overflow-y: auto; display: grid; gap: 12px; }
.workout-list li { padding: 14px 16px; border: 1px solid var(--border); border-radius: 12px; background: linear-gradient(180deg, rgba(21,25,34,0.7), rgba(17,21,32,0.7)); cursor: pointer; display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.workout-list li:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,0.35); background: linear-gradient(180deg, rgba(21,25,34,0.9), rgba(17,21,32,0.85)); }
.workout-title { font-weight: 600; }
.workout-meta { color: var(--muted); font-size: 12px; }

.workout-detail { border-left: 1px solid var(--border); background: linear-gradient(180deg, rgba(21,25,34,0.8), rgba(17,21,32,0.85)); padding: 16px; overflow-y: auto; box-shadow: inset 0 1px 0 rgba(255,255,255,0.03); }
.detail-header { display: flex; align-items: center; justify-content: space-between; }
.detail-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 12px; }
.stats { display: flex; gap: 8px; color: var(--muted); font-size: 13px; }
.video-container { position: relative; padding-top: 56.25%; background: #0c0f17; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.video-container iframe { position: absolute; inset: 0; width: 100%; height: 100%; }

.btn { padding: 10px 14px; border-radius: 10px; border: 1px solid var(--border); background: linear-gradient(180deg, rgba(17,21,32,0.9), rgba(14,18,28,0.9)); color: var(--text); cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .2s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(0,0,0,0.25); }
.btn.primary { background: linear-gradient(135deg, #6ea4ff, #8a7dff); border-color: transparent; color: white; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.primary.glow { box-shadow: 0 0 0 0 var(--glow); animation: pulseGlow 3s ease-in-out infinite; }
@keyframes pulseGlow { 0%,100%{ box-shadow: 0 0 0 0 var(--glow);} 50%{ box-shadow: 0 0 30px 8px var(--glow);} }
.btn.danger { background: #2a1111; border-color: #3a1a1a; color: #ffb3b3; }
.btn.danger:hover { background: #3a1515; }

.icon-btn { background: transparent; border: 1px solid var(--border); color: var(--muted); border-radius: 10px; width: 36px; height: 36px; cursor: pointer; }
.icon-btn:hover { color: var(--text); }

@media (max-width: 1024px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .workouts { grid-template-columns: 1fr; }
  .mobile-controls { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; }
}

@media (max-width: 680px) {
  .composer .grid { grid-template-columns: 1fr; }
  .day-tabs { gap: 6px; }
  .btn { padding: 9px 12px; }
  .workout-list { padding: 12px; gap: 10px; }
  .workout-list li { padding: 12px 12px; }
  .workout-detail { padding: 12px; }
}

/* Focus for accessibility */
.show-focus :focus { outline: 2px solid var(--primary); outline-offset: 2px; }

/* Modal */
.modal { position: fixed; inset: 0; display: none; }
.modal[aria-hidden="false"] { display: block; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); backdrop-filter: blur(3px); }
.modal-dialog { position: relative; width: min(520px, 92vw); margin: 8vh auto; background: linear-gradient(180deg, rgba(21,25,34,0.9), rgba(17,21,32,0.95)); border: 1px solid var(--border); border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px; border-bottom: 1px solid var(--border); }
.modal-body { padding: 16px; }
.glass { backdrop-filter: blur(12px); }

/* Toasts */
.toast-host { position: fixed; bottom: 16px; right: 16px; display: grid; gap: 10px; z-index: 50; }
.toast { padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border); background: linear-gradient(135deg, rgba(21,25,34,0.95), rgba(17,21,32,0.95)); color: var(--text); box-shadow: 0 12px 30px rgba(0,0,0,0.4); animation: toastIn .2s ease-out; }
@keyframes toastIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* Scrollbar */
.workout-list, .routine-list, .workout-detail { scrollbar-width: thin; scrollbar-color: #2f3b54 transparent; }
.workout-list::-webkit-scrollbar, .routine-list::-webkit-scrollbar, .workout-detail::-webkit-scrollbar { width: 10px; }
.workout-list::-webkit-scrollbar-track, .routine-list::-webkit-scrollbar-track, .workout-detail::-webkit-scrollbar-track { background: transparent; }
.workout-list::-webkit-scrollbar-thumb, .routine-list::-webkit-scrollbar-thumb, .workout-detail::-webkit-scrollbar-thumb { background: #2f3b54; border-radius: 10px; border: 2px solid transparent; background-clip: content-box; }