:root {
  --bg: #f6f4ef;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #6f6b63;
  --accent: #ff8a3d;
  --accent-dark: #e36f21;
  --border: #e5e0d8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #fdf8ef 0%, #f2efe7 100%);
  color: var(--text);
}

.app {
  max-width: 920px;
  margin: 0 auto;
  padding: 16px;
}

.app__header h1 {
  margin: 0 0 8px;
  font-size: 24px;
}

.tabs {
  display: flex;
  gap: 8px;
}

.tab {
  flex: 1;
  border: 1px solid var(--border);
  background: var(--card);
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 600;
}

.tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.page {
  margin-top: 16px;
}

.hidden {
  display: none;
}

.card-list {
  display: grid;
  gap: 12px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  display: grid;
  gap: 8px;
}

.card__header {
  display: flex;
  gap: 12px;
  align-items: center;
}

.card__image {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: #f0ebe0;
  object-fit: cover;
}

.card__title {
  font-weight: 700;
  font-size: 18px;
}

.card__meta {
  font-size: 14px;
  color: var(--muted);
}

.timer {
  display: flex;
  gap: 8px;
  align-items: center;
}

.timer__time {
  font-weight: 700;
  font-size: 20px;
}

.btn {
  border: 1px solid var(--border);
  background: var(--card);
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-dark);
}

.day-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.day-tabs button {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
}

.day-tabs button.active {
  background: #2b2b2b;
  color: #fff;
  border-color: #2b2b2b;
}

.gym-form {
  display: grid;
  gap: 12px;
}

.exercise-row {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  background: var(--card);
}

.exercise-row header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.exercise-row img {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: #f0ebe0;
  object-fit: cover;
}

.exercise-row .hint {
  color: var(--muted);
  font-size: 13px;
}

.fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.fields label {
  display: grid;
  gap: 4px;
  font-size: 13px;
}

.fields input {
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
}

.gym-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.history details {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  margin-bottom: 8px;
  background: var(--card);
}

.history summary {
  cursor: pointer;
  font-weight: 600;
}

@media (max-width: 600px) {
  .fields {
    grid-template-columns: 1fr;
  }

  .gym-actions {
    flex-direction: column;
  }
}


.sets {
  display: grid;
  gap: 8px;
  margin-top: 6px;
}

.set-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fffaf2;
}

.set-row label {
  display: grid;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #4a453f;
}

.set-row input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #d7d1c8;
  background: #fff;
  font-size: 15px;
}

.set-row input:focus {
  outline: 2px solid rgba(255, 138, 61, 0.35);
  border-color: var(--accent);
}

@media (max-width: 600px) {
  .set-row {
    grid-template-columns: 1fr;
  }
}