/* ============================================
   Ericsson Trip Planner — Modern UI
   ============================================ */

/* --- CSS Variables (Theme) --- */
:root {
  --color-primary: #0091EA;
  --color-primary-dark: #0277BD;
  --color-primary-light: #B3E5FC;
  --color-primary-bg: #E1F5FE;
  --color-primary-glow: rgba(0, 145, 234, 0.2);

  --color-danger: #EF5350;
  --color-danger-dark: #D32F2F;
  --color-success: #43A047;
  --color-success-light: #E8F5E9;
  --color-warning: #FFA726;

  --color-bg: #F0F4F8;
  --color-surface: #FFFFFF;
  --color-surface-elevated: #FFFFFF;
  --color-border: #E0E6ED;
  --color-border-light: #EDF1F5;
  --color-text: #1A2332;
  --color-text-secondary: #64748B;
  --color-text-light: #94A3B8;

  --color-trip-bg: linear-gradient(135deg, #E1F5FE 0%, #B3E5FC 100%);
  --color-trip-border: #4FC3F7;
  --color-today-ring: #0091EA;

  --color-overlay: rgba(15, 23, 42, 0.6);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: 14px;
  --font-size-sm: 12px;
  --font-size-xs: 10px;
  --font-size-lg: 16px;
  --font-size-xl: 20px;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 100px;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* --- Header --- */
.app-header {
  background: linear-gradient(135deg, #0091EA 0%, #0277BD 50%, #01579B 100%);
  color: #fff;
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
  overflow: hidden;
}

.logout-btn {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 2;
  backdrop-filter: blur(10px);
}

.logout-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.4);
}

.logout-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.app-header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
  pointer-events: none;
}

.app-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  position: relative;
}

.app-subtitle {
  font-size: var(--font-size-sm);
  opacity: 0.75;
  margin-top: var(--space-xs);
  font-weight: 400;
  letter-spacing: 0.02em;
  position: relative;
}

/* --- Main Layout --- */
.app-main {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* --- Calendar Section --- */
.calendar-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  border: 1px solid var(--color-border-light);
}

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  gap: var(--space-sm);
}

.calendar-nav h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  text-align: center;
  letter-spacing: -0.01em;
}

.calendar-nav button {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary-dark);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.calendar-nav button:hover {
  background: var(--color-primary-bg);
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.calendar-nav button:active { transform: translateY(0); }

.calendar-nav button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Calendar Grid */
.calendar-grid { display: flex; flex-direction: column; }

.calendar-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  margin-bottom: var(--space-sm);
}

.calendar-day-name {
  text-align: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
  padding: var(--space-sm) 0;
}

.calendar-body {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

/* Calendar Day Cells */
.calendar-day {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: var(--space-sm);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  overflow: hidden;
  min-height: 64px;
}

.calendar-day:hover {
  background: var(--color-primary-bg);
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.calendar-day:active { transform: translateY(0); }

.calendar-day:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.calendar-day--empty {
  background: transparent;
  border-color: transparent;
  cursor: default;
  pointer-events: none;
}
.calendar-day--empty:hover { background: transparent; box-shadow: none; transform: none; }

.calendar-day--today {
  border-color: var(--color-today-ring);
  border-width: 2px;
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.calendar-day__number {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1;
}

.calendar-day--has-trip {
  background: var(--color-trip-bg);
  border-color: var(--color-trip-border);
}
.calendar-day--has-trip:hover {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow), var(--shadow-sm);
}

.calendar-day__driver {
  font-size: var(--font-size-xs);
  color: var(--color-primary-dark);
  font-weight: 700;
  margin-top: var(--space-xs);
  text-align: center;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.calendar-day__passengers {
  font-size: 9px;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.3;
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

/* --- Cost Summary Section --- */
.costs-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  border: 1px solid var(--color-border-light);
}

.costs-section h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.costs-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.costs-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.costs-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-md);
}

.cost-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  font-size: var(--font-size-sm);
  font-weight: 600;
  font-family: inherit;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.cost-chip:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
}

.cost-chip--active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.cost-chip--active:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
}

.cost-row__total-details {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-top: 2px;
  letter-spacing: normal;
  text-transform: none;
}

/* --- Stats Section --- */
.stats-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  min-width: 0;
}

.stats-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.stats-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
}

.stats-header button {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  font-family: inherit;
}

.stats-header button:hover {
  background: var(--color-primary-bg);
  border-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.stats-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  animation: modalIn var(--transition-normal) both;
}

.stats-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.stats-range {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.stats-range-btn {
  padding: 6px 14px;
  border: none;
  background: transparent;
  font-size: var(--font-size-sm);
  font-weight: 600;
  font-family: inherit;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.stats-range-btn:hover {
  color: var(--color-primary-dark);
}

.stats-range-btn--active {
  background: var(--color-surface);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-xs);
}

.stats-range-select {
  padding: 8px var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-family: inherit;
  background: var(--color-surface);
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.stats-range-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.btn-sm {
  padding: 6px 14px;
  font-size: var(--font-size-xs);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  min-width: 0;
}

.stats-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  min-height: 280px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.stats-card h3 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.stats-chart-wrap {
  position: relative;
  flex: 1;
  width: 100%;
  min-height: 240px;
}

.stats-chart-wrap canvas {
  max-width: 100%;
  width: 100% !important;
  height: 100% !important;
}

.stats-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-primary-light);
}

.stats-summary__total {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stats-summary__total span {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-dark);
  font-weight: 600;
}

.stats-summary__total strong {
  font-size: 1.5rem;
  color: var(--color-primary-dark);
  font-weight: 800;
}

.stats-summary__count {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

@media (max-width: 599px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stats-summary { flex-direction: column; align-items: flex-start; gap: var(--space-sm); }
}

.costs-empty {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-style: italic;
}

.cost-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: 12px var(--space-md);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.cost-row__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cost-row__name {
  font-weight: 700;
  font-size: var(--font-size-base);
}

.cost-row__date {
  font-weight: 700;
  font-size: var(--font-size-base);
  color: var(--color-primary-dark);
}

.cost-row__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--font-size-sm);
}

.cost-row__meta-item {
  color: var(--color-text-secondary);
}

.cost-row__meta-item strong {
  color: var(--color-text);
  font-weight: 600;
}

.cost-row__meta-label {
  color: var(--color-text-light);
}

.cost-row__meta-item--badge {
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-xs);
}

.cost-row__stats {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
}

.cost-row__stat {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.cost-row__stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

.cost-row__stat-value {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.cost-row--total {
  flex-direction: row !important;
  justify-content: space-between;
  align-items: center;
  background: var(--color-primary-bg);
  border-color: var(--color-primary-light);
  margin-top: var(--space-sm);
  font-size: var(--font-size-base);
}

.cost-row--total .cost-row__name {
  font-weight: 700;
  color: var(--color-primary-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: var(--font-size-sm);
}

.cost-row--total .cost-row__amount {
  font-size: 1.3rem;
  color: var(--color-primary-dark);
}

.cost-row__details {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.cost-row__trips {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

.cost-row__amount {
  font-weight: 800;
  font-size: var(--font-size-lg);
  color: var(--color-primary-dark);
  min-width: 70px;
  text-align: right;
}

.cost-row__debts {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: var(--space-sm);
  border-top: 1px dashed var(--color-border);
}

.cost-row__debt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 8px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
}

.cost-row__debt-arrow {
  font-weight: 600;
  color: var(--color-text);
}

.cost-row__debt-amount {
  font-weight: 700;
  color: var(--color-primary-dark);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin-top: 2px;
}

/* --- Members Section --- */
.members-section {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  border: 1px solid var(--color-border-light);
}

.members-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.members-header h2 { font-size: 1.1rem; font-weight: 700; }

.members-header button {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}
.members-header button:hover {
  background: var(--color-primary-bg);
  border-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}
.members-header button:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.members-panel { display: flex; flex-direction: column; gap: var(--space-md); }

.members-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.members-list li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
  padding: 6px var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}
.members-list li:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-xs);
}

.members-list li button {
  background: none;
  border: none;
  color: var(--color-danger);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
  border-radius: 50%;
  transition: all var(--transition-fast);
  opacity: 0.6;
}
.members-list li button:hover { opacity: 1; background: rgba(239, 83, 80, 0.1); }
.members-list li button:focus-visible { outline: 2px solid var(--color-danger); outline-offset: 2px; }

.add-member-form { display: flex; gap: var(--space-sm); }

.add-member-form input {
  flex: 1;
  padding: 10px var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-family: inherit;
  transition: all var(--transition-fast);
  background: var(--color-bg);
}
.add-member-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
  background: var(--color-surface);
}

.add-member-form button {
  padding: 10px var(--space-lg);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.add-member-form button:hover { background: var(--color-primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.add-member-form button:active { transform: translateY(0); }
.add-member-form button:focus-visible { outline: 2px solid var(--color-primary-dark); outline-offset: 2px; }

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-overlay);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-md);
  animation: fadeIn var(--transition-normal) both;
}
.modal-overlay[hidden] { display: none; }

.modal {
  background: var(--color-surface-elevated);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-lg);
  animation: modalIn var(--transition-spring) both;
  border: 1px solid var(--color-border-light);
}

.modal-sm { max-width: 380px; text-align: center; }
.modal-sm h3 { margin-bottom: var(--space-sm); font-size: 1.1rem; }
.modal-sm p { color: var(--color-text-secondary); margin-bottom: var(--space-lg); font-size: var(--font-size-sm); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}
.modal-header h3 { font-size: 1.15rem; font-weight: 700; }

.modal-close-btn {
  background: var(--color-bg);
  border: none;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--color-text-secondary);
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.modal-close-btn:hover { color: var(--color-text); background: var(--color-border); }
.modal-close-btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }
@keyframes modalIn {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes modalOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(16px) scale(0.97); }
}

.modal-overlay--closing { animation: fadeOut var(--transition-normal) both; }
.modal-overlay--closing .modal { animation: modalOut var(--transition-normal) both; }

/* --- Trip Form --- */
.trip-form { display: flex; flex-direction: column; gap: var(--space-md); }

.trip-date-display {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  border: none;
  padding: 0;
}

.form-group label,
.form-group legend {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.form-group select {
  padding: 10px var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-family: inherit;
  background: var(--color-bg);
  transition: all var(--transition-fast);
  appearance: auto;
  cursor: pointer;
}
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
  background: var(--color-surface);
}

/* Pill-style checkboxes */
.passengers-checkboxes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: var(--space-xs);
}

.passengers-checkboxes label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  padding: 6px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  user-select: none;
  background: var(--color-surface);
}

.passengers-checkboxes label:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-bg);
}

.passengers-checkboxes label:has(input:checked) {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.passengers-checkboxes input[type="checkbox"] {
  display: none;
}

.form-error { font-size: var(--font-size-xs); color: var(--color-danger); font-weight: 600; }
.form-error[hidden] { display: none; }

.form-error-banner {
  background: rgba(239, 83, 80, 0.08);
  color: var(--color-danger);
  border: 1px solid rgba(239, 83, 80, 0.2);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-top: var(--space-sm);
}
.form-error-banner[hidden] { display: none; }

.form-actions {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px var(--space-lg);
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1.4;
  letter-spacing: 0.01em;
}
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.btn:active { transform: scale(0.97); }

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); box-shadow: 0 4px 12px var(--color-primary-glow); transform: translateY(-1px); }

.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: var(--color-danger-dark); box-shadow: 0 4px 12px rgba(239, 83, 80, 0.25); transform: translateY(-1px); }

.btn-secondary { background: var(--color-surface); color: var(--color-text-secondary); border-color: var(--color-border); }
.btn-secondary:hover { background: var(--color-bg); border-color: var(--color-text-light); transform: translateY(-1px); }

/* --- Toast Notifications --- */
.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  background: var(--color-text);
  color: #fff;
  padding: 12px var(--space-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastIn var(--transition-spring) both;
  backdrop-filter: blur(8px);
}
.toast--success { background: var(--color-success); }
.toast--error { background: var(--color-danger); }
.toast--leaving { animation: toastOut var(--transition-normal) both; }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(16px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(16px) scale(0.95); }
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 599px) {
  .app-header { padding: var(--space-lg) var(--space-sm); }
  .app-header h1 { font-size: 1.3rem; }
  .app-main { padding: var(--space-md) var(--space-sm); gap: var(--space-md); }
  .calendar-section, .members-section { padding: var(--space-md); border-radius: var(--radius-lg); }
  .calendar-nav { flex-wrap: wrap; justify-content: center; gap: var(--space-sm); }
  .calendar-nav h2 { order: -1; width: 100%; text-align: center; font-size: 1.1rem; }
  .calendar-nav button { padding: var(--space-sm) var(--space-md); font-size: var(--font-size-xs); }
  .calendar-day { aspect-ratio: auto; min-height: 52px; padding: var(--space-xs); }
  .calendar-day__number { font-size: var(--font-size-xs); }
  .calendar-day__driver { font-size: 9px; }
  .calendar-day__passengers { font-size: 8px; }
  .calendar-day-name { font-size: 9px; padding: var(--space-xs) 0; }
  .calendar-body { gap: 3px; }
  .modal { padding: var(--space-md); border-radius: var(--radius-lg); max-width: 100%; }
  .form-actions { flex-direction: column; }
  .form-actions .btn { width: 100%; }
  .toast-container { bottom: var(--space-md); right: var(--space-sm); left: var(--space-sm); }
  .passengers-checkboxes label { padding: 5px 10px; font-size: var(--font-size-xs); }
}

@media (min-width: 600px) and (max-width: 899px) {
  .calendar-day { min-height: 74px; }
}

@media (min-width: 900px) {
  .app-main { padding: var(--space-xl) var(--space-lg); }
  .calendar-day { min-height: 84px; }
  .calendar-day__driver { font-size: var(--font-size-xs); }
}

@media (min-width: 1200px) {
  .app-main { max-width: 1100px; }
  .calendar-day { min-height: 94px; }
}