/**
 * Risky Business - Premium Data-Driven Flight Finder
 * Clean, geeky aesthetic with business class touches
 */

/* ===== CSS Variables ===== */
:root {
    /* Core palette */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a24;
    --bg-card-hover: #22222e;

    /* Text */
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #555566;

    /* Accent - champagne gold for premium feel */
    --accent-gold: #d4af37;
    --accent-gold-dim: #a08020;
    --accent-gold-glow: rgba(212, 175, 55, 0.15);

    /* Status colors */
    --savings-green: #22c55e;
    --savings-green-dim: #166534;
    --warning-amber: #f59e0b;
    --info-blue: #3b82f6;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(212, 175, 55, 0.3);

    /* Typography */
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Consolas', monospace;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
    font-family: var(--font-mono);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.mono {
    font-family: var(--font-mono);
}

/* ===== Layout ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== Header ===== */
.header {
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--border-subtle);
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

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

.logo-mark {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-gold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.logo-tagline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

/* ===== Search Panel ===== */
.search-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
}

.search-panel h2 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.search-panel h2::before {
    content: '>';
    color: var(--accent-gold);
}

.search-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
}

/* Form elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.form-group input,
.form-group select {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px var(--accent-gold-glow);
}

.form-group select {
    cursor: pointer;
}

.form-group select option {
    background: var(--bg-card);
}

/* Radius slider */
.radius-control {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.radius-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    outline: none;
}

.radius-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-gold);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

.radius-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.radius-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-gold);
    text-align: center;
}

/* Search button */
.btn-search {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-gold-dim) 100%);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--bg-primary);
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-top: var(--space-md);
}

.btn-search:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px var(--accent-gold-glow);
}

.btn-search:active {
    transform: translateY(0);
}

/* ===== Results Section ===== */
.results-section {
    margin: var(--space-2xl) 0;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
}

.results-title {
    font-size: 1rem;
    color: var(--text-secondary);
}

.results-title span {
    color: var(--text-primary);
}

.results-meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.direct-price-note {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--info-blue);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875rem;
}

.direct-price-note strong {
    color: var(--info-blue);
}

/* ===== Flight Cards ===== */
.flight-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}

.flight-card:hover {
    border-color: var(--border-accent);
    transform: translateX(4px);
    box-shadow: -4px 0 0 var(--accent-gold);
}

.flight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--savings-green) 0%, var(--accent-gold) 100%);
    opacity: 0;
    transition: opacity 0.2s;
}

.flight-card:hover::before {
    opacity: 1;
}

/* Card header */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}

.origin-info h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.origin-code {
    font-family: var(--font-mono);
    background: var(--accent-gold-glow);
    color: var(--accent-gold);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

.origin-distance {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-top: var(--space-xs);
}

/* Price badge */
.price-badge {
    text-align: right;
}

.flight-price {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.price-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Savings badge (legacy) */
.savings-badge {
    text-align: right;
}

.savings-amount {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--savings-green);
}

.savings-percent {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--savings-green-dim);
    background: rgba(34, 197, 94, 0.1);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

/* More expensive flights - red styling */
.savings-badge.more-expensive .savings-amount {
    color: #ef4444;
}

.savings-badge.more-expensive .savings-percent {
    color: #b91c1c;
    background: rgba(239, 68, 68, 0.1);
}

/* Flight details grid */
.flight-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    padding: var(--space-md) 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    margin: var(--space-md) 0;
}

.flight-leg {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.flight-leg-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.flight-leg-route {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
}

.flight-leg-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.flight-leg-time {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-gold);
}

.flex-indicator {
    font-size: 0.7rem;
    color: var(--warning-amber);
    font-family: var(--font-mono);
}

/* Card footer */
.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.airline-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.airline-code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.airline-name {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.class-name {
    font-size: 0.75rem;
    color: var(--accent-gold);
    font-style: italic;
}

.flight-meta {
    display: flex;
    gap: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.meta-item.layover {
    color: var(--warning-amber);
}

/* Price comparison */
.price-comparison {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
    margin-top: var(--space-sm);
}

.alt-price {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.direct-price {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    text-decoration: line-through;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

.empty-state h3 {
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

/* ===== Loading State ===== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    gap: var(--space-md);
}

.loading-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-subtle);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border-subtle);
    margin-top: var(--space-2xl);
    text-align: center;
}

.footer p {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }

    .search-grid {
        grid-template-columns: 1fr;
    }

    .flight-details {
        grid-template-columns: 1fr;
    }

    .card-header {
        flex-direction: column;
        gap: var(--space-md);
    }

    .savings-badge {
        text-align: left;
    }

    .card-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .results-header {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: flex-start;
    }
}

/* ===== Utilities ===== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-gold { color: var(--accent-gold); }
.text-green { color: var(--savings-green); }
.text-muted { color: var(--text-muted); }

/* ===== Async Loading States ===== */

/* Feeder loading placeholder */
.feeder-loading {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border: 1px dashed var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.feeder-loading .loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-subtle);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Feeder error state */
.feeder-error {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px dashed rgba(239, 68, 68, 0.3);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

/* Card update animation */
.flight-card.feeder-updated {
    animation: cardPulse 0.5s ease-out;
}

@keyframes cardPulse {
    0% { box-shadow: 0 0 0 0 var(--accent-gold-glow); }
    50% { box-shadow: 0 0 0 8px var(--accent-gold-glow); }
    100% { box-shadow: 0 0 0 0 transparent; }
}

/* Smooth card reordering */
.flight-card {
    will-change: transform;
    transition: transform 0.4s ease-out;
}

/* Search progress indicator */
.search-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-gold), var(--savings-green));
    transition: width 0.3s ease-out;
    z-index: 1001;
}

/* Results loading state */
.results-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    gap: var(--space-lg);
}

.results-loading .loading-spinner-large {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.results-loading-text {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Feeder progress counter */
.feeder-progress-text {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
}

/* Price updating animation */
.price-updating {
    animation: priceFlash 0.3s ease-out;
}

@keyframes priceFlash {
    0% { opacity: 0.5; transform: scale(0.95); }
    100% { opacity: 1; transform: scale(1); }
}

/* ===== Filter Panel ===== */
.filter-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
}

.filter-section {
    margin-bottom: var(--space-sm);
}

.filter-count {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.filter-group-full {
    flex: 1;
    min-width: 100%;
}

.filter-group-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xs);
}

.filter-group-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-mode-toggle {
    display: flex;
    gap: var(--space-xs);
}

.filter-mode-btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    background: transparent;
    color: var(--text-muted);
}

.filter-mode-btn:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.filter-mode-btn.active {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: var(--bg-primary);
}

.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    max-height: 180px;
    overflow-y: auto;
    padding: var(--space-xs);
}

.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--accent-gold-glow);
    border: 1px solid var(--accent-gold);
    border-radius: 20px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-primary);
    transition: all 0.2s;
    white-space: nowrap;
}

.filter-chip:hover {
    background: var(--accent-gold-glow);
    border-color: var(--accent-gold);
}

.filter-chip input[type="checkbox"] {
    accent-color: var(--accent-gold);
    margin: 0;
    cursor: pointer;
}

.btn-small {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 4px 10px;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-small:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

/* ===== Compact Search Form for Results ===== */
.search-summary-bar {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-md);
}

.search-summary-bar .search-params {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.search-summary-bar .search-params .param-label {
    color: var(--text-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    display: block;
}

.search-summary-bar .search-params .param-value {
    color: var(--accent-gold);
    font-weight: 500;
}

.search-summary-bar .btn-edit-search {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--accent-gold);
    border-radius: var(--radius-sm);
    color: var(--accent-gold);
    cursor: pointer;
    transition: all 0.2s;
}

.search-summary-bar .btn-edit-search:hover {
    background: var(--accent-gold);
    color: var(--bg-primary);
}

.search-summary-bar .param-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.search-summary-bar .param-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.search-summary-bar .param-value {
    font-size: 0.85rem;
    color: var(--accent-gold);
    font-weight: 500;
}

/* ===== Pagination Controls ===== */
.pagination-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-xl) 0;
    margin-top: var(--space-lg);
    border-top: 1px solid var(--border-subtle);
}

.pagination-info {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.pagination-nav {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.pagination-pages {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.pagination-btn {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--bg-card);
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-btn.current {
    background: var(--accent-gold);
    border-color: var(--accent-gold);
    color: var(--bg-primary);
    font-weight: 600;
}

.pagination-btn.pagination-num {
    min-width: 40px;
    text-align: center;
}

.pagination-ellipsis {
    color: var(--text-muted);
    padding: 0 var(--space-xs);
}

.pagination-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
}

/* Responsive pagination */
@media (max-width: 600px) {
    .pagination-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .pagination-btn.pagination-prev,
    .pagination-btn.pagination-next {
        flex: 1;
        min-width: 100px;
    }

    .pagination-pages {
        order: 1;
        width: 100%;
        justify-content: center;
        margin-top: var(--space-sm);
    }
}

/* ===== Results Truncation Message ===== */
.results-truncated-message {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    margin-top: var(--space-md);
    background: var(--bg-secondary);
    border: 1px dashed var(--border-subtle);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.results-truncated-message .truncated-icon {
    font-size: 1.2rem;
}

.results-truncated-message .truncated-count {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.results-truncated-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-left: var(--space-sm);
}