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

:root {
  --neon-primary: #00cfff;
  --neon-secondary: #0099dd;
  --neon-accent: #ff6b35;
  --neon-rest: #888;
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface2: #242424;
  --text: #f0f0f0;
  --text-muted: #888;
  --border: #333;

  --push-color: #ff6b35;
  --pull-color: #00cfff;
  --legs-color: #a855f7;
  --rest-color: #555;
}

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

/* NAV */
nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-wrap: wrap;
}

.nav-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--neon-primary);
  text-shadow: 0 0 8px var(--neon-primary), 0 0 20px var(--neon-primary);
  text-decoration: none;
  letter-spacing: 0.05em;
}

nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  transition: color 0.2s;
}

nav a:hover, nav a.active {
  color: var(--neon-primary);
  text-shadow: 0 0 6px var(--neon-primary);
}

nav a.active { border-bottom: 1px solid var(--neon-primary); }

.nav-spacer { flex: 1; }

/* MODE TOGGLE */
.mode-toggle {
  display: flex;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.mode-toggle button {
  padding: 0.4rem 0.9rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s;
}

.mode-toggle button.active {
  background: var(--neon-primary);
  color: #000;
}

/* LAYOUT */
main {
  padding: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--neon-primary);
  text-shadow: 0 0 10px var(--neon-primary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
}

h2 {
  font-size: 1.05rem;
  color: var(--neon-secondary);
  text-shadow: 0 0 6px var(--neon-secondary);
  margin-bottom: 0.75rem;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--neon-primary);
  background: transparent;
  color: var(--neon-primary);
  font-size: 0.85rem;
  font-family: inherit;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s;
  border-radius: 4px;
}

.btn:hover {
  background: var(--neon-primary);
  color: #000;
  box-shadow: 0 0 12px var(--neon-primary);
}

.btn-accent { border-color: var(--neon-accent); color: var(--neon-accent); }
.btn-accent:hover { background: var(--neon-accent); color: #000; box-shadow: 0 0 12px var(--neon-accent); }
.btn-ghost { border-color: var(--border); color: var(--text-muted); }
.btn-ghost:hover { border-color: var(--text-muted); background: var(--surface2); color: var(--text); box-shadow: none; }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.78rem; }

/* TOOLBAR */
.toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

/* CARDS */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.2rem;
}

/* WORKOUT TYPE CHIPS */
.workout-chip {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.chip-push { background: var(--push-color)22; color: var(--push-color); border: 1px solid var(--push-color)66; }
.chip-pull { background: var(--pull-color)22; color: var(--pull-color); border: 1px solid var(--pull-color)66; }
.chip-legs { background: var(--legs-color)22; color: var(--legs-color); border: 1px solid var(--legs-color)66; }
.chip-rest { background: var(--rest-color)22; color: var(--rest-color); border: 1px solid var(--rest-color)66; }

/* PLAN CALENDAR */
.date-range-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.date-range-bar label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  white-space: nowrap;
}

.date-range-bar input[type="date"] {
  width: auto;
  flex: 0 0 150px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.day-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  transition: border-color 0.2s;
}

.day-card .day-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}

.day-card .day-date {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.day-card select {
  font-size: 0.82rem;
  padding: 0.35rem 0.5rem;
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  border-radius: 4px;
  outline: none;
}

.day-card.push { border-color: var(--push-color)66; }
.day-card.pull { border-color: var(--pull-color)66; }
.day-card.legs { border-color: var(--legs-color)66; }
.day-card.rest { border-color: var(--rest-color)44; }

/* WORKOUT CARDS */
.workout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.workout-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.workout-card:hover {
  border-color: var(--neon-primary);
  box-shadow: 0 0 10px var(--neon-primary)33;
}

.workout-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.workout-card .exercise-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.workout-card .muscle-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; }

/* EXERCISE LIBRARY */
.exercise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
}

.exercise-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.9rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

.exercise-card:hover { border-color: var(--neon-primary); }

.exercise-card h3 { font-size: 0.9rem; margin-bottom: 0.3rem; }
.exercise-card .category {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--neon-secondary);
}

.tag {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 99px;
  border: 1px solid var(--neon-secondary);
  color: var(--neon-secondary);
  margin: 0.1rem;
}

/* MODAL */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: #000a;
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-backdrop.open { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--neon-primary);
  box-shadow: 0 0 30px var(--neon-primary)44;
  border-radius: 8px;
  padding: 1.5rem;
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.2rem;
}
.modal-header h2 { margin: 0; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }

/* FORMS */
.form-group { margin-bottom: 1rem; }
label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

input[type="text"], input[type="number"], input[type="date"],
textarea, select {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  outline: none;
  transition: border-color 0.2s;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--neon-primary);
  box-shadow: 0 0 6px var(--neon-primary)44;
}
textarea { resize: vertical; min-height: 80px; }

/* EXERCISE ROWS IN WORKOUT */
.exercise-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--surface2);
  font-size: 0.9rem;
}
.exercise-row .ex-name { flex: 1; }
.exercise-row .ex-sets, .exercise-row .ex-reps { flex: 0 0 55px; }
.exercise-row .ex-note { flex: 0 0 100px; font-size: 0.78rem; color: var(--text-muted); }

/* WORKOUT DETAIL VIEW */
.exercise-list-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--surface2);
}
.exercise-list-item:last-child { border-bottom: none; }
.ex-number {
  font-size: 0.75rem;
  color: var(--text-muted);
  flex: 0 0 20px;
  text-align: right;
}
.ex-info { flex: 1; }
.ex-info strong { display: block; font-size: 0.95rem; margin-bottom: 0.1rem; }
.ex-info span { font-size: 0.8rem; color: var(--text-muted); }
.ex-sets-reps {
  font-size: 0.85rem;
  color: var(--neon-primary);
  font-weight: 600;
  white-space: nowrap;
}

/* EMPTY */
.empty {
  text-align: center;
  color: var(--text-muted);
  padding: 3rem 1rem;
  font-size: 0.9rem;
}

/* UTIL */
.flex { display: flex; }
.gap { gap: 0.75rem; }
.gap-sm { gap: 0.5rem; }
.mt { margin-top: 1rem; }
.mt-sm { margin-top: 0.5rem; }
.hidden { display: none !important; }

/* MOBILE */
@media (max-width: 600px) {
  main { padding: 1rem; }
  nav { padding: 0.75rem 1rem; }
  .calendar-grid { grid-template-columns: 1fr 1fr; }
  .workout-grid, .exercise-grid { grid-template-columns: 1fr; }
}