/* ============================================
   BusIndia AutoBooker — Dashboard Styles
   Design: Simple, Classy, Light, Minimal
   ============================================ */

:root {
    /* Light Classy Palette */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-glass: rgba(0, 0, 0, 0.03);
    --border-subtle: #e2e8f0;
    --border-focus: #94a3b8;

    /* Accent */
    --accent-primary: #0f172a;
    --accent-secondary: #334155;
    --accent-gradient: #0f172a;

    /* Status Colors */
    --success: #10b981;
    --success-bg: #d1fae5;
    --warning: #f59e0b;
    --warning-bg: #fef3c7;
    --error: #ef4444;
    --error-bg: #fee2e2;
    --info: #3b82f6;
    --info-bg: #dbeafe;

    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-accent: #0f172a;

    /* Typography */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* Dark Theme overrides */
:root[data-theme="dark"] {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(30, 41, 59, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-focus: rgba(99, 102, 241, 0.5);

    --accent-primary: #818cf8;
    --accent-secondary: #6366f1;
    --accent-gradient: #818cf8;

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-accent: #a5b4fc;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Optional Dark Theme FX */
:root[data-theme="dark"] .bg-gradient, 
:root[data-theme="dark"] .bg-dots {
    display: block;
}

:root[data-theme="dark"] .moon-icon {
    display: none !important;
}

:root[data-theme="dark"] .sun-icon {
    display: block !important;
}

.bg-gradient, .bg-dots {
    display: none;
}

/* Header */
#app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

nav {
    display: flex;
    gap: 0.5rem;
}

.nav-btn {
    padding: 0.5rem 1rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.875rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.nav-btn:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.nav-btn.active {
    color: var(--accent-primary);
    font-weight: 500;
    background: var(--bg-card-hover);
    border-color: var(--border-subtle);
}

/* Main Layout */
main {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Form Container */
.form-container {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.form-header {
    padding: 2rem 2rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.form-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Form Sections */
.form-section {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-subtle);
}
.form-section:last-of-type {
    border-bottom: none;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.section-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

.step-badge {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.optional-tag {
    font-size: 0.6875rem;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
}

/* Form Elements */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem 1.5rem;
}

@media (max-width: 640px) {
    .form-grid { grid-template-columns: 1fr; }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.form-group label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.625rem 0.875rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.875rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-primary);
    outline: none;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

.field-hint {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

/* Passenger Cards */
.passenger-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
}

.passenger-card h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.passenger-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 0.75rem;
}
@media (max-width: 480px) {
    .passenger-grid { grid-template-columns: 1fr; }
}

/* Info Callout */
.info-callout {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    margin-top: 1rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* Buttons */
.form-actions {
    padding: 1.5rem 2rem;
    background: var(--bg-primary);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 2rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
}
.btn-primary:hover { background: var(--accent-secondary); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 0.8125rem;
    cursor: pointer;
}
.btn-secondary:hover { background: var(--bg-card-hover); }

/* Bookings List */
.bookings-container {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-sm);
}

.bookings-container .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.booking-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-bottom: 0.75rem;
}

.booking-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.booking-route {
    font-size: 1rem;
    font-weight: 500;
}
.booking-route .arrow {
    color: var(--text-muted);
    margin: 0 0.375rem;
}

.status-badge {
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 500;
    border: 1px solid;
}
.status-SCHEDULED { background: var(--info-bg); color: var(--info); border-color: #bfdbfe; }
.status-BOOKING_STARTED { background: var(--warning-bg); color: var(--warning); border-color: #fde68a; }
.status-PAYMENT_PENDING { background: var(--warning-bg); color: var(--warning); border-color: #fde68a; }
.status-BOOKED { background: var(--success-bg); color: var(--success); border-color: #a7f3d0; }
.status-BOOKING_FAILED, .status-NO_BUS_AVAILABLE, .status-PAYMENT_EXPIRED { background: var(--error-bg); color: var(--error); border-color: #fecaca; }
.status-CANCELLED { background: var(--bg-primary); color: var(--text-muted); border-color: var(--border-subtle); }

.booking-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    font-size: 0.8125rem;
}
.booking-detail {
    display: flex;
    flex-direction: column;
}
.booking-detail .label { color: var(--text-muted); font-size: 0.6875rem; text-transform: uppercase; }
.booking-detail .value { color: var(--text-primary); font-weight: 500; }

.booking-actions {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-subtle);
}

.btn-danger {
    padding: 0.375rem 0.75rem;
    background: var(--bg-secondary);
    color: var(--error);
    border: 1px solid var(--error-bg);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
}
.btn-danger:hover { background: var(--error-bg); }

/* Empty State */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }
.empty-state svg { margin-bottom: 1rem; opacity: 0.5; }

/* Toast */
#toast-container { position: fixed; top: 1rem; right: 1rem; z-index: 1000; display: flex; flex-direction: column; gap: 0.5rem; }
.toast {
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4); display: none; align-items: center; justify-content: center; z-index: 200; }
.modal-overlay.active { display: flex; }
.modal { background: var(--bg-secondary); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 2rem; max-width: 400px; width: 90%; text-align: center; box-shadow: var(--shadow-lg); }
.modal-icon { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem; background: var(--bg-primary); border: 1px solid var(--border-subtle); }
.modal h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.5rem; }
.modal p { color: var(--text-secondary); font-size: 0.875rem; margin-bottom: 1.5rem; }

/* Spinner */
.spinner { width: 16px; height: 16px; border: 2px solid var(--text-muted); border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================
   Responsive Layout (Mobile)
   ============================================ */
@media (max-width: 600px) {
    /* Header & Nav */
    .header-inner { flex-direction: column; align-items: flex-start; gap: 1rem; padding: 1rem; }
    nav { width: 100%; justify-content: flex-start; flex-wrap: wrap; }
    .nav-btn { flex: 1 1 auto; justify-content: center; padding: 0.5rem; font-size: 0.8125rem; }
    #theme-toggle { flex: 0 0 auto; margin-left: auto; }
    
    /* Layout */
    main { padding: 1rem 0.5rem 3rem; }
    
    /* Forms */
    .form-container, .bookings-container { 
        border-radius: var(--radius-lg); 
        border-left: none; 
        border-right: none; 
    }
    
    .form-header { padding: 1.5rem 1rem 1rem; }
    .form-section { padding: 1.5rem 1rem; }
    .form-actions { padding: 1.5rem 1rem; display: flex; flex-direction: column; gap: 0.75rem; }
    .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
    
    /* Passenger Grid */
    .passenger-card { padding: 1rem 0.75rem; }
    
    /* Bookings */
    .bookings-container { padding: 1.25rem 1rem; }
    .booking-card-header { flex-direction: column; gap: 0.5rem; }
    .status-badge { align-self: flex-start; }
    
    /* Modals & Toasts */
    .modal { padding: 1.5rem 1rem; }
    #toast-container { left: 1rem; right: 1rem; width: auto; }
    .toast { max-width: 100%; }
}