/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #22253a;
  --accent: #6c63ff;
  --accent2: #ff6584;
  --text: #e2e8f0;
  --muted: #8892a4;
  --border: #2d3148;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { opacity: 0.8; }

/* ===== Nav ===== */
nav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--accent);
}

.nav-links { display: flex; gap: 1.5rem; list-style: none; }
.nav-links a { color: var(--muted); font-size: 0.95rem; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }

/* ===== Layout ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; }
.container-sm { max-width: 720px; margin: 0 auto; padding: 2rem 1.5rem; }

/* ===== Hero ===== */
.hero {
  text-align: center;
  padding: 5rem 1rem 4rem;
}
.hero h1 { font-size: 3rem; font-weight: 800; margin-bottom: 1rem; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.15rem; color: var(--muted); margin-bottom: 2rem; max-width: 560px; margin-inline: auto; }

.btn {
  display: inline-block;
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s, transform 0.1s;
}
.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary { background: var(--accent); color: #fff; }
.btn-outline { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.btn-sm { padding: 0.4rem 1rem; font-size: 0.85rem; }
.btn-full { width: 100%; }

/* ===== Cards ===== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.15s;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.card h3 { font-size: 1rem; margin-bottom: 0.5rem; }
.card .badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--surface2);
  color: var(--muted);
  margin: 0.15rem 0.15rem 0 0;
}

/* ===== Form ===== */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.88rem; color: var(--muted); margin-bottom: 0.35rem; }
.form-control {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}
.form-control:focus { border-color: var(--accent); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }

.checkbox-group { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.3rem; }
.checkbox-group label {
  display: flex; align-items: center; gap: 0.3rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.3rem 0.7rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color 0.2s;
  color: var(--text);
}
.checkbox-group input[type=checkbox]:checked + span,
.checkbox-group label:has(input:checked) { border-color: var(--accent); color: var(--accent); }

/* ===== Program output ===== */
#program-output { margin-top: 2rem; }
#program-output .week-header {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 1.5rem 0 0.5rem;
  color: var(--accent);
}
#program-output .day-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 0.8rem;
}
#program-output .day-title { font-weight: 600; margin-bottom: 0.5rem; }
#program-output ol { padding-left: 1.2rem; }
#program-output li { font-size: 0.92rem; margin-bottom: 0.25rem; }
#program-output li a { color: var(--accent2); }

/* ===== Search / Filters ===== */
.search-bar { display: flex; gap: 0.7rem; margin-bottom: 1.5rem; align-items: center; flex-wrap: wrap; }
.search-bar .form-control { max-width: 340px; }
.filter-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.filter-section-label { font-size: 0.82rem; color: var(--muted); margin: 0.8rem 0 0.35rem; text-transform: uppercase; letter-spacing: 0.05em; }
.chip {
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  font-size: 0.82rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ===== Features section ===== */
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; margin-top: 3rem; }
.feature-card { background: var(--surface); border-radius: var(--radius); padding: 1.5rem; text-align: center; border: 1px solid var(--border); }
.feature-card .icon { font-size: 2rem; margin-bottom: 0.7rem; }
.feature-card h3 { font-size: 1rem; margin-bottom: 0.4rem; }
.feature-card p { font-size: 0.85rem; color: var(--muted); }

/* ===== Spinner ===== */
.spinner {
  display: none;
  width: 32px; height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 1rem auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Pagination ===== */
.pagination { display: flex; gap: 0.4rem; margin-top: 2rem; justify-content: center; flex-wrap: wrap; }
.page-btn { padding: 0.35rem 0.8rem; border-radius: 8px; background: var(--surface); border: 1px solid var(--border); color: var(--muted); cursor: pointer; font-size: 0.85rem; }
.page-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.page-btn:hover:not(.active) { border-color: var(--accent); color: var(--text); }

/* ===== Misc ===== */
h2 { font-size: 1.5rem; margin-bottom: 0.5rem; }
.text-muted { color: var(--muted); font-size: 0.9rem; }
.error-msg { color: var(--accent2); font-size: 0.9rem; margin-top: 0.5rem; }
.success-msg { color: #4ade80; font-size: 0.9rem; margin-top: 0.5rem; }