/* ==========================================================================
   Medication Tracker Dark Theme Stylesheet
   ========================================================================== */

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-card-hover: #26354a;
  --border-color: #334155;
  --border-focus: #3b82f6;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-primary: #10b981;
  --accent-primary-hover: #059669;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-amber: #f59e0b;

  --status-success-bg: rgba(16, 185, 129, 0.15);
  --status-success-text: #34d399;
  --status-pending-bg: rgba(245, 158, 11, 0.15);
  --status-pending-text: #fbbf24;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.4);
  
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Common Components */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: #475569;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--accent-primary-hover);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
}

.btn-secondary-sm {
  background-color: #334155;
  color: var(--text-main);
  font-size: 0.85rem;
  padding: 0.5rem 0.9rem;
}
.btn-secondary-sm:hover {
  background-color: #475569;
}

.btn-outline-sm {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 0.4rem 0.8rem;
}
.btn-outline-sm:hover {
  background-color: var(--border-color);
  color: var(--text-main);
}

.btn-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 1.4rem;
  line-height: 1;
}
.btn-icon:hover {
  background-color: #334155;
}

.btn-block {
  width: 100%;
}

.hidden {
  display: none !important;
}

/* Alerts */
.alert {
  padding: 0.8rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.alert-danger {
  background-color: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
}

/* ==========================================================================
   Login Page
   ========================================================================== */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
  background: radial-gradient(circle at top, #1e293b 0%, #0f172a 100%);
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
}

.login-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.app-icon {
  font-size: 2.8rem;
  margin-bottom: 0.5rem;
}

.login-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
}

.login-header p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.login-footer {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Main Application Header & Nav
   ========================================================================== */
.top-nav {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0.8rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.brand-icon {
  font-size: 1.5rem;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.brand-title small {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-primary);
  background: var(--status-success-bg);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  margin-left: 0.3rem;
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-badge {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.main-content {
  max-width: 1140px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Course Overall Progress Card */
.progress-card {
  background: linear-gradient(135deg, #1e293b 0%, #172033 100%);
}

.progress-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.progress-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
}

.subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.progress-badge {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-primary);
  background: var(--status-success-bg);
  padding: 0.2rem 0.8rem;
  border-radius: var(--radius-sm);
}

.progress-bar-track {
  width: 100%;
  height: 12px;
  background-color: var(--bg-primary);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.25rem;
  border: 1px solid var(--border-color);
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981 0%, #3b82f6 100%);
  border-radius: 6px;
  transition: width 0.4s ease-in-out;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Day Navigation Bar */
.day-nav-card {
  padding: 0.75rem 1rem;
}

.day-nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.day-selector-wrapper {
  flex: 1;
  min-width: 200px;
}

.day-select {
  width: 100%;
  padding: 0.6rem 1rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  outline: none;
  cursor: pointer;
}
.day-select:focus {
  border-color: var(--accent-blue);
}

/* Day Heading */
.day-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.day-title-bar h1 {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.2;
}

.day-date {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.status-pill {
  padding: 0.35rem 0.9rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.status-completed {
  background-color: var(--status-success-bg);
  color: var(--status-success-text);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-pending {
  background-color: var(--status-pending-bg);
  color: var(--status-pending-text);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Periods Grid */
.periods-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.period-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 160px;
}

.period-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.period-icon {
  font-size: 1.4rem;
}

.period-info h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.period-count {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.doses-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.empty-period {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-style: italic;
  padding: 0.5rem 0;
}

/* Individual Dose Item Card */
.dose-item {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  transition: background-color 0.2s, border-color 0.2s;
  cursor: pointer;
}

.dose-item:hover {
  background-color: #141e33;
  border-color: #475569;
}

.dose-item.completed {
  opacity: 0.65;
  background-color: rgba(16, 185, 129, 0.05);
  border-color: rgba(16, 185, 129, 0.3);
}

.dose-checkbox-wrapper {
  margin-top: 0.15rem;
}

.dose-checkbox {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  border: 2px solid #475569;
  background-color: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.dose-item.completed .dose-checkbox {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
}

.dose-checkbox::after {
  content: '✓';
  font-weight: 800;
  font-size: 0.9rem;
  opacity: 0;
  transform: scale(0.6);
  transition: all 0.15s ease;
}

.dose-item.completed .dose-checkbox::after {
  opacity: 1;
  transform: scale(1);
}

.dose-content {
  flex: 1;
}

.dose-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.dose-item.completed .dose-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.dose-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-blue);
  background-color: rgba(59, 130, 246, 0.15);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-top: 0.3rem;
  margin-bottom: 0.3rem;
}

.dose-rules {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.35;
}

.completed-time {
  font-size: 0.72rem;
  color: var(--status-success-text);
  margin-top: 0.3rem;
}

/* Reminders Section */
.reminders-card {
  background: rgba(30, 41, 59, 0.6);
  border-left: 4px solid var(--accent-amber);
}

.reminders-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.85rem;
}

.reminders-icon {
  font-size: 1.3rem;
}

.reminders-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.reminders-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.reminders-list li {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.4;
  padding-left: 0.5rem;
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--accent-primary);
  color: var(--text-main);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  font-size: 0.88rem;
  font-weight: 500;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 768px) {
  .nav-container {
    padding: 0.6rem 1rem;
  }
  .main-content {
    padding: 1rem 0.85rem 2.5rem 0.85rem;
    gap: 1rem;
  }
  .day-nav-wrapper {
    flex-direction: row;
  }
  .day-selector-wrapper {
    order: 3;
    width: 100%;
    min-width: 100%;
    margin-top: 0.25rem;
  }
  #todayBtn {
    order: 2;
    flex: 1;
  }
  .periods-grid {
    grid-template-columns: 1fr;
  }
}