/* === Variables & Base === */
:root {
  color-scheme: light dark;

  /* Palette */
  --color-coral: #ff616b;
  --color-yellow: #ffb852;
  --color-mint: #b5ffc2;
  --color-teal: #80ffcc;

  /* Functional */
  --color-bg: #ffe5b4;
  --color-text: #222222;
  --color-text-muted: #666666;
  --color-link: #ff616b;
  --color-border: #80ffcc;
  --color-card-bg: #fff5e1;
  --color-accent: #ff616b;
  --color-checked: #d9ffe0;

  --gradient-border: linear-gradient(135deg, #ff616b, #ffb852, #b5ffc2, #80ffcc);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #122e22;
    --color-text: #e0e0e0;
    --color-text-muted: #999999;
    --color-link: #ff8a92;
    --color-border: #ffb852;
    --color-card-bg: #1f4837;
    --color-accent: #ff616b;
    --color-checked: #1a3a2a;

    --color-coral: #ff7a82;
    --color-yellow: #ffc76e;
    --color-mint: #8ae69b;
    --color-teal: #5ce6b0;

    --gradient-border: linear-gradient(135deg, #ff7a82, #ffc76e, #8ae69b, #5ce6b0);
  }
}

* { box-sizing: border-box; }

body {
  font-family: 'Silkscreen', cursive;
  max-width: 72ch;
  margin: 2rem auto;
  padding: 0 1rem;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
}

a { color: var(--color-link); text-decoration: none; }
a:hover { text-decoration: underline; }

/* === Header & Nav === */
.site-header h1 {
  margin: 0 0 0.25rem 0;
  font-size: 1.5rem;
}

.site-header h1 a {
  color: var(--color-coral);
}

.main-nav ul {
  display: flex;
  gap: 0.3rem;
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 1.5rem 0;
  flex-wrap: wrap;
}

.main-nav li a {
  display: block;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text);
}

.main-nav li a:hover {
  text-decoration: none;
  border-color: var(--color-coral);
}

.main-nav li.active a {
  background: var(--color-coral);
  color: #fff;
  border-color: var(--color-coral);
}

/* === Day Page === */
.day-page h2 { margin-bottom: 0.25rem; }

.day-subtitle {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
}

/* === Exercise Cards (Day Pages) === */
.exercise-card {
  position: relative;
  border: none;
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  background: var(--color-card-bg);
}

.exercise-card::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 12px;
  background: var(--gradient-border);
  z-index: -1;
}

.exercise-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.15rem;
  color: var(--color-coral);
}

.exercise-desc {
  margin: 0 0 0.5rem 0;
}

.exercise-cue {
  border-left: 3px solid var(--color-yellow);
  padding-left: 0.75rem;
  margin: 0.75rem 0;
  font-style: italic;
  color: var(--color-text-muted);
}

/* === Video Embed (16:9 responsive) === */
.video-embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 6px;
  margin-top: 1rem;
}

.video-embed iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* === Tracker (Home Page) === */
.tracker-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.tracker-header h2 {
  margin: 0;
  color: var(--color-coral);
}

.week-label {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin: 0;
}

.btn-export {
  margin-left: auto;
  padding: 0.5rem 1rem;
  background: var(--color-coral);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-family: 'Silkscreen', cursive;
}

.btn-export:hover {
  opacity: 0.9;
}

/* === Tracker Day Cards === */
.tracker-day {
  position: relative;
  margin-bottom: 1.25rem;
  border: none;
  border-radius: 10px;
  padding: 1rem;
  background: var(--color-card-bg);
}

.tracker-day::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 12px;
  background: var(--gradient-border);
  z-index: -1;
}

.tracker-day h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.1rem;
}

.tracker-day h3 a {
  color: var(--color-text);
}

.tracker-day h3 a:hover {
  color: var(--color-coral);
  text-decoration: none;
}

.day-focus {
  font-weight: normal;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-left: 0.5rem;
}

.tracker-exercises {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.tracker-exercise {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  transition: background 0.15s;
  flex-wrap: wrap;
}

.tracker-exercise:hover {
  background: rgba(255, 97, 107, 0.06);
}

.tracker-exercise:has(input:checked) {
  background: var(--color-checked);
}

.tracker-exercise:has(input:checked) .exercise-name {
  text-decoration: line-through;
  opacity: 0.7;
}

.tracker-exercise-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  flex: 1;
  min-width: 0;
}

.exercise-checkbox {
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
  cursor: pointer;
  accent-color: var(--color-coral);
}

.tracker-inputs {
  display: flex;
  gap: 0.35rem;
  margin-left: auto;
}

.exercise-weight,
.exercise-rpe {
  padding: 0.2rem 0.3rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.8rem;
  font-family: 'Silkscreen', cursive;
  cursor: pointer;
}

.exercise-weight {
  width: 6.5ch;
}

.exercise-rpe {
  width: 6ch;
}

/* === Days List === */
.day-list {
  list-style: none;
  padding: 0;
}

.day-list li {
  margin-bottom: 0.5rem;
}

.day-list li a {
  display: block;
  padding: 0.75rem 1rem;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.day-list li a:hover {
  text-decoration: none;
  border-color: var(--color-coral);
}

/* === Footer === */
footer {
  margin-top: 2rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* === Responsive === */
@media (max-width: 600px) {
  body { margin: 1rem auto; }
  .tracker-header { flex-direction: column; align-items: flex-start; }
  .btn-export { margin-left: 0; }
  .main-nav ul { gap: 0.15rem; }
  .main-nav li a { padding: 0.3rem 0.5rem; font-size: 0.8rem; }
}