/**
 * RailBud - Layout Styles
 * Main structural layout for the application
 */

/* ========================================
   APP CONTAINER
   ======================================== */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh; /* Dynamic viewport height for mobile */
    background: var(--bg-secondary);
}

/* ========================================
   HEADER
   ======================================== */
.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    box-shadow: var(--header-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--container-padding);
    max-width: var(--max-width);
    margin: 0 auto;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-primary);
    text-decoration: none;
    transition: opacity var(--duration-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    background: linear-gradient(135deg, var(--color-primary-500) 0%, var(--color-primary-600) 100%);
    border-radius: var(--radius-md);
    color: white;
}

.logo-icon [data-lucide] {
    width: 1.125rem;
    height: 1.125rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo-title {
    font-size: var(--text-md);
    font-weight: var(--font-bold);
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-size: var(--text-xs);
    color: var(--text-muted);
    font-weight: var(--font-medium);
    margin-top: 1px;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--space-4) var(--container-padding);
}

/* ========================================
   SEARCH SECTION
   ======================================== */
.search-section {
    background: var(--surface-primary);
    border-radius: var(--radius-2xl);
    padding: var(--space-5);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-5);
}

.section-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.section-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ========================================
   SEARCH FORM
   ======================================== */
.search-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    position: relative;
}

/* Swap button positioning */
.swap-btn {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    margin-top: -0.75rem; /* Adjust for labels */
}

/* Form groups layout */
.form-grid > .form-group[data-field="from"],
.form-grid > .form-group[data-field="to"] {
    padding-right: 3.5rem; /* Space for swap button */
}

.form-grid > .form-group[data-field="date"] {
    margin-top: var(--space-1);
}

/* ========================================
   RESULTS SECTION
   ======================================== */
.results-section {
    margin-top: var(--space-4);
    animation: slideUp var(--duration-normal) var(--ease-out);
}

/* Query Summary */
.query-summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--surface-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-3);
}

.query-route {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    flex: 1;
    min-width: 0;
}

.query-route [data-lucide] {
    width: 1rem;
    height: 1rem;
    color: var(--icon-accent);
    flex-shrink: 0;
}

.query-route .station-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.query-route .arrow {
    flex-shrink: 0;
}

.query-date {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    color: var(--text-secondary);
    background: var(--surface-secondary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.query-date [data-lucide] {
    width: 0.75rem;
    height: 0.75rem;
}

/* Tabs */
.tabs {
    margin-bottom: var(--space-3);
}

/* Route List */
.route-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

/* Empty Route List Message */
.route-list:empty::after {
    content: 'No routes in this category';
    display: block;
    text-align: center;
    padding: var(--space-8);
    color: var(--text-muted);
    font-size: var(--text-sm);
}

/* ========================================
   STATE SECTIONS
   ======================================== */
.state-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8) var(--container-padding);
}

.state-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 20rem;
}

.state-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.state-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

/* Suggestions Box */
.suggestions-box {
    width: 100%;
    background: var(--surface-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    text-align: left;
}

.suggestions-title {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-3);
}

.suggestions-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.suggestions-list li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-primary);
}

.suggestions-list [data-lucide] {
    width: 0.875rem;
    height: 0.875rem;
    color: var(--color-success-500);
    flex-shrink: 0;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--surface-primary);
    border-top: 1px solid var(--border-secondary);
    padding: var(--space-3) var(--container-padding);
    margin-top: auto;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
}

.footer-credits {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.footer-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.status-text {
    display: none;
}

/* ========================================
   MODAL LAYOUT
   ======================================== */
.modal-overlay {
    padding: 0;
}

.modal {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 90vh;
    max-height: 90dvh;
    border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

/* Modal Sections */
.modal-section {
    margin-bottom: var(--space-4);
}

.modal-section:last-child {
    margin-bottom: 0;
}

.modal-section-title {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.modal-section-content {
    font-size: var(--text-sm);
    color: var(--text-primary);
}

.modal-section-content p {
    margin-bottom: var(--space-2);
}

.modal-section-content p:last-child {
    margin-bottom: 0;
}

.modal-section-content strong {
    color: var(--text-primary);
}

/* Modal Info Grid */
.modal-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.modal-info-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.modal-info-label {
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.modal-info-value {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
}

/* Modal Classes */
.modal-classes {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

/* Modal Link */
.modal-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--text-link);
    font-weight: var(--font-medium);
}

.modal-link [data-lucide] {
    width: 0.875rem;
    height: 0.875rem;
}

/* ========================================
   HORIZONTAL SCROLLABLE AREAS
   ======================================== */
.scroll-x {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.scroll-x::-webkit-scrollbar {
    display: none;
}

.scroll-x > * {
    scroll-snap-align: start;
    flex-shrink: 0;
}

/* ========================================
   DIVIDERS
   ======================================== */
.divider {
    height: 1px;
    background: var(--border-secondary);
    margin: var(--space-4) 0;
}

.divider-vertical {
    width: 1px;
    background: var(--border-secondary);
    margin: 0 var(--space-3);
    align-self: stretch;
}

/* ========================================
   EMPTY STATES WITHIN CARDS
   ======================================== */
.empty-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    text-align: center;
}

.empty-message [data-lucide] {
    width: 2rem;
    height: 2rem;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

.empty-message p {
    font-size: var(--text-sm);
    color: var(--text-muted);
}

/* ========================================
   SPACING UTILITIES
   ======================================== */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.pt-0 { padding-top: 0; }
.pt-4 { padding-top: var(--space-4); }

.pb-0 { padding-bottom: 0; }
.pb-4 { padding-bottom: var(--space-4); }

.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* ========================================
   FLEX UTILITIES
   ======================================== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

/* ========================================
   WIDTH UTILITIES
   ======================================== */
.w-full { width: 100%; }
.max-w-full { max-width: 100%; }
.min-w-0 { min-width: 0; }

/* ========================================
   SAFE AREA INSETS (iOS)
   ======================================== */
@supports (padding: env(safe-area-inset-bottom)) {
    .footer {
        padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom));
    }
    
    .modal {
        padding-bottom: env(safe-area-inset-bottom);
    }
    
    .toast-container {
        top: calc(var(--header-height) + var(--space-4) + env(safe-area-inset-top));
    }
}