/* 🎨 Traffic Catcher Premium Design System */

:root {
    /* HSL 컬러 팔레트 */
    --bg-app: hsl(210, 40%, 98%);
    --bg-card: hsl(0, 0%, 100%);
    --text-primary: hsl(222, 47%, 11%);
    --text-secondary: hsl(215, 16%, 47%);
    --text-light: hsl(213, 27%, 84%);
    
    --primary: hsl(221, 83%, 53%);
    --primary-hover: hsl(221, 83%, 45%);
    --primary-light: hsl(221, 83%, 96%);
    
    --success: hsl(142, 71%, 45%);
    --success-bg: hsl(142, 71%, 95%);
    --danger: hsl(350, 89%, 60%);
    --danger-bg: hsl(350, 89%, 96%);
    --warning: hsl(38, 92%, 50%);
    --warning-bg: hsl(38, 92%, 95%);
    --info: hsl(199, 89%, 48%);
    --info-bg: hsl(199, 89%, 95%);
    
    --border-color: hsl(214, 32%, 91%);
    --radius-lg: 16px;
    --radius-md: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    
    --font-sans: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-app);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
.app-header {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    gap: 1.5rem;
}

.app-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.app-header .subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.status-time-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.35;
}

#last-updated {
    font-size: 0.85rem;
    color: var(--text-primary);
    font-weight: 600;
}

.next-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: 0.1rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.green {
    background-color: var(--success);
    box-shadow: 0 0 0 3px var(--success-bg);
}

/* Button & Spinner */
.btn-primary {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.1);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-primary:disabled {
    background-color: var(--text-light);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

.spinner.hidden {
    display: none;
}

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

/* Main Layout */
.app-main {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Grid Layout */
.portal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.portal-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.portal-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Badges */
.badge {
    font-size: 0.75rem;
    padding: 0.15rem 0.5rem;
    border-radius: 9999px;
    font-weight: 600;
}

.badge-nate { background-color: var(--warning-bg); color: var(--warning); }
.badge-daum { background-color: var(--info-bg); color: var(--info); }
.badge-zum { background-color: var(--primary-light); color: var(--primary); }
.badge-signal { background-color: hsl(24, 100%, 95%); color: hsl(24, 100%, 50%); }

.card-body {
    padding: 1rem 1.5rem;
    flex-grow: 1;
}

/* Trend List styling */
.trend-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.trend-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0.75rem;
    border-radius: var(--radius-md);
    background-color: var(--bg-app);
    transition: background-color 0.15s ease;
}

.trend-item:hover {
    background-color: var(--primary-light);
}

.rank-num {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--primary);
    width: 24px;
    flex-shrink: 0;
}

.keyword-text {
    flex-grow: 1;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    padding-right: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.font-semibold {
    font-weight: 600;
}

/* Trend Detail (For ZUM questions/data) */
.trend-item.item-has-detail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
}

.trend-main {
    display: flex;
    align-items: center;
    width: 100%;
}

.trend-detail {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding-left: 24px;
    width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* State badges (up/down/new/same) */
.state-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    min-width: 36px;
    text-align: center;
    flex-shrink: 0;
}

.state-same { background-color: hsl(210, 16%, 93%); color: var(--text-secondary); }
.state-up { background-color: var(--danger-bg); color: var(--danger); }
.state-down { background-color: var(--primary-light); color: var(--primary); }
.state-new { background-color: var(--success-bg); color: var(--success); }

/* Stock Section */
.stock-section {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.section-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.section-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.section-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Stock Table */
.stock-table-container {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.stock-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    min-width: 600px;
}

.stock-table th {
    background-color: var(--bg-app);
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.stock-table td {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

.stock-table tbody tr:last-child td {
    border-bottom: none;
}

.stock-table tbody tr:hover {
    background-color: var(--primary-light);
}

.col-rank { width: 60px; text-align: center; font-weight: 700; color: var(--text-secondary); }
.col-code { width: 100px; font-family: monospace; color: var(--text-secondary); }
.col-name { width: 250px; }
.col-price { width: 150px; font-weight: 500; }
.col-change { width: 120px; }

/* Price Badge */
.price-badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    text-align: center;
}

.change-up { background-color: var(--danger-bg); color: var(--danger); }
.change-down { background-color: var(--primary-light); color: var(--primary); }
.change-flat { background-color: var(--bg-app); color: var(--text-secondary); }

/* Loading and empty states */
.loading-item, .table-loading, .no-data-item, .table-no-data {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 1.5rem;
}

.loading-item {
    background: none;
}

.table-loading, .table-no-data {
    padding: 3rem;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 1rem 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

/* Responsive adjustments */
@media (max-width: 640px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        padding: 1.25rem 1.5rem;
    }
    
    .header-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .btn-primary {
        width: 100%;
        justify-content: center;
    }
    
    .app-container {
        padding: 1rem;
    }
}