:root {
  color-scheme: dark;
  --bg: #0f1417;
  --panel: #171f24;
  --panel-2: #202a31;
  --text: #f4f7f8;
  --muted: #aab7bf;
  --accent: #77e0a8;
  --accent-2: #6fb7ff;
  --border: rgba(255,255,255,.08);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(circle at top left, rgba(111,183,255,.15), transparent 28%), var(--bg);
  color: var(--text);
}
.app-shell { max-width: 1100px; margin: 0 auto; padding: 28px 18px 40px; }
.hero { margin-bottom: 24px; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; margin: 0 0 8px; }
h1 { margin: 0 0 10px; font-size: clamp(1.8rem, 3vw, 2.6rem); }
.subtitle { color: var(--muted); margin: 0; }
label { display:grid; gap:6px; color:var(--muted); font-size:.9rem; }
select, input, button {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
}
select, input { padding: 12px; }
button { padding: 12px 14px; cursor:pointer; }
button.ghost { background: transparent; }
.summary {
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap:12px;
  margin-bottom:18px;
}
.summary-card, .day-card {
  background: rgba(23,31,36,.9);
  border:1px solid var(--border);
  border-radius:20px;
}
.summary-card { padding:16px; }
.summary-card strong { display:block; font-size:1.5rem; margin-top:4px; }
.days { display:grid; gap:18px; }
.day-card { padding:18px; }
.day-card h2 { margin:0 0 14px; font-size:1.15rem; }
.block { display:grid; gap:12px; margin-top:16px; }
.block-title { color: var(--accent-2); font-size:.82rem; text-transform:uppercase; letter-spacing:.08em; }
.exercise-card {
  display:grid;
  grid-template-columns: minmax(260px,1fr) minmax(420px, 1.35fr) 150px;
  gap:14px;
  padding:14px;
  border-radius:16px;
  background: var(--panel-2);
}
.exercise-card h3 { margin:0 0 6px; font-size:1rem; }
.meta, .details { margin:0; color:var(--muted); }
.meta { font-size:.88rem; margin-bottom:5px; }
.details { font-size:.92rem; line-height:1.4; }
.previous { margin:8px 0 0; font-size:.88rem; }
.weeks-grid {
  display:grid;
  grid-template-columns: repeat(4, minmax(110px, 1fr));
  gap:10px;
}
.week-column {
  display:grid;
  gap:8px;
  padding:10px;
  border-radius:14px;
  background: rgba(15,20,23,.45);
  border:1px solid var(--border);
}
.week-column strong {
  color: var(--accent-2);
  font-size:.88rem;
}
.week-column label {
  font-size:.78rem;
}
.week-column input { width:100%; }
.exercise-image {
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:128px;
  border-radius:16px;
  background: rgba(15,20,23,.45);
  border:1px solid var(--border);
  overflow:hidden;
}
.exercise-image img {
  width:100%;
  height:100%;
  object-fit:cover;
}
.exercise-placeholder {
  color: var(--muted);
  text-align:center;
  font-size:.82rem;
  line-height:1.35;
  padding:12px;
}
.progress-up { color: var(--accent); }
.progress-flat { color: var(--muted); }
@media (max-width: 720px) {
  .app-shell { padding: 18px 12px 28px; }
  .hero { margin-bottom: 18px; }
  h1 { font-size: 1.6rem; }
  .summary {
    grid-template-columns: 1fr 1fr;
  }
  .summary-card:last-child {
    grid-column: 1 / -1;
  }
  .day-card { padding: 14px; }
  .exercise-card { grid-template-columns: 1fr; }
  .exercise-copy h3 { font-size: 1.02rem; }
  .weeks-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }
  .week-column {
    padding: 8px 6px;
    text-align: center;
  }
  .week-column strong {
    font-size: .72rem;
  }
  .week-column label {
    font-size: .7rem;
  }
  .week-column input {
    padding: 10px 6px;
    text-align: center;
  }
  .exercise-image {
    min-height: 180px;
    order: -1;
  }
}

@media (max-width: 480px) {
  .summary {
    grid-template-columns: 1fr;
  }
  .summary-card:last-child {
    grid-column: auto;
  }
  .weeks-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}