* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

body {
  background: #121212;
  color: #e0e0e0;
  padding: 0 0 80px 0;
  min-height: 100vh;
}

header {
  background: #1e1e2f;
  color: #fff;
  padding: 0.8rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid #333;
}

header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

#user-info {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

#user-info span {
  font-size: 0.9rem;
  color: #aaa;
}

button {
  background: #2a2a4a;
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  touch-action: manipulation;
  min-height: 44px;
  min-width: 44px;
}

button:hover {
  background: #3a3a5a;
}

button:active {
  transform: scale(0.96);
}

button.secondary {
  background: #2a2a4a;
}
button.secondary:hover {
  background: #3a3a5a;
}

button.success {
  background: #1b9e5e;
}
button.success:hover {
  background: #14804a;
}

button.danger {
  background: #b33a4a;
}
button.danger:hover {
  background: #9a2e3c;
}

#main-content {
  padding: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

.card {
  background: #1e1e2e;
  border-radius: 16px;
  padding: 1.2rem;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  border: 1px solid #2a2a3e;
}

.card h2, .card h3, .card h4 {
  color: #fff;
  margin-bottom: 0.8rem;
}

.routine-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 0;
  border-bottom: 1px solid #2a2a3e;
}

.routine-item:last-child {
  border-bottom: none;
}

.routine-item .info {
  flex: 1;
  padding-right: 0.5rem;
}

.routine-item .info .name {
  font-weight: 600;
  font-size: 1.1rem;
  color: #fff;
}

.routine-item .info .date {
  font-size: 0.8rem;
  color: #888;
}

.routine-item .actions {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.routine-item .actions button {
  padding: 0.4rem 0.8rem;
  font-size: 0.75rem;
  min-height: 36px;
  min-width: 36px;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: #ccc;
}

.form-group input, .form-group select {
  width: 100%;
  padding: 0.7rem;
  background: #2a2a3e;
  border: 1px solid #444;
  border-radius: 10px;
  font-size: 1rem;
  color: #fff;
}

.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: #1b9e5e;
}

.table-responsive {
  overflow-x: auto;
  margin: 0.5rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 0.5rem 0.3rem;
  text-align: center;
  border-bottom: 1px solid #2a2a3e;
}

th {
  background: #2a2a3e;
  font-weight: 600;
  color: #ccc;
}

td input[type="text"], td input[type="number"] {
  width: 100%;
  padding: 0.4rem;
  background: #2a2a3e;
  border: 1px solid #444;
  border-radius: 6px;
  text-align: center;
  font-size: 0.9rem;
  color: #fff;
}

td input[type="text"]:focus, td input[type="number"]:focus {
  border-color: #1b9e5e;
  outline: none;
}

td input[type="checkbox"] {
  width: 24px;
  height: 24px;
  cursor: pointer;
  accent-color: #1b9e5e;
}

td .default-hint {
  color: #777;
  font-size: 0.65rem;
  display: block;
  margin-top: 2px;
}

.badge {
  background: #1b9e5e;
  color: #fff;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  font-size: 0.7rem;
}

.add-btn {
  background: transparent;
  color: #1b9e5e;
  border: 1px dashed #1b9e5e;
  padding: 0.5rem 1rem;
  border-radius: 30px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
  width: 100%;
  text-align: center;
}

.add-btn:hover {
  background: #1b9e5e22;
}

.hidden {
  display: none !important;
}

.timer {
  font-size: 1.4rem;
  font-weight: bold;
  color: #1b9e5e;
  font-variant-numeric: tabular-nums;
}

.exercise-block {
  margin-bottom: 1.5rem;
  border: 1px solid #2a2a3e;
  border-radius: 12px;
  padding: 0.8rem;
  background: #1a1a2a;
}

.exercise-block h4 {
  margin-bottom: 0.5rem;
  color: #fff;
}

/* Historial */
.session-card {
  background: #1a1a2a;
  border-left: 4px solid #1b9e5e;
}

.session-card summary {
  color: #aaa;
  font-weight: 500;
}

.session-card summary:hover {
  color: #fff;
}

/* Enlaces */
a {
  color: #1b9e5e;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: #1a1a2a;
}
::-webkit-scrollbar-thumb {
  background: #444;
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: #666;
}