@layer base, layout, components, utilities;

@layer base {
    :root {
        /* Fintech Dark Palette - oklch */
        --bg-main: oklch(15% 0.02 250);
        --bg-card: oklch(20% 0.03 250);
        --bg-sidebar: oklch(12% 0.02 250);
        --bg-hover: oklch(25% 0.04 250);
        
        --text-primary: oklch(95% 0.01 250);
        --text-secondary: oklch(75% 0.02 250);
        --text-muted: oklch(50% 0.02 250);
        
        --accent-primary: oklch(70% 0.15 140); /* Gain Green */
        --accent-secondary: oklch(60% 0.18 20);  /* Loss Red */
        --accent-info: oklch(70% 0.12 230);      /* Neutral Blue */
        
        --border-color: oklch(30% 0.03 250);
        --shadow-deep: 0 10px 30px oklch(0% 0 0 / 0.5);
        --glow-green: 0 0 15px oklch(70% 0.15 140 / 0.3);
        
        --font-main: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    }

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

    body {
        background-color: var(--bg-main);
        color: var(--text-primary);
        font-family: var(--font-main);
        overflow: hidden; /* Prevent body scroll, use dashboard layout */
        line-height: 1.5;
    }

    h1, h2, h3 {
        font-weight: 700;
        letter-spacing: -0.02em;
    }

    ul { list-style: none; }
    button { cursor: pointer; border: none; font-family: inherit; }
    input { font-family: inherit; border: none; outline: none; }
}

@layer layout {
    .dashboard {
        display: grid;
        grid-template-columns: 240px 1fr 320px;
        height: 100vh;
        width: 100vw;
    }

    .sidebar {
        background-color: var(--bg-sidebar);
        border-right: 1px solid var(--border-color);
        display: flex;
        flex-direction: column;
        padding: 1.5rem;
    }

    .main-content {
        display: flex;
        flex-direction: column;
        overflow-y: auto;
        border-right: 1px solid var(--border-color);
        background: linear-gradient(to bottom, var(--bg-main), var(--bg-sidebar));
    }

    .right-panel {
        background-color: var(--bg-sidebar);
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        gap: 2rem;
        overflow-y: auto;
    }

    .top-bar {
        height: 60px;
        min-height: 60px;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        background-color: var(--bg-sidebar);
        position: sticky;
        top: 0;
        z-index: 10;
    }

    /* Scrollbar Styling */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: var(--bg-sidebar); }
    ::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 10px; }
    ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
}

@layer components {
    /* Sidebar Logo */
    .logo {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        margin-bottom: 2.5rem;
        font-size: 1.25rem;
        font-weight: 800;
        color: var(--accent-info);
    }

    .sidebar nav ul li {
        display: flex;
        align-items: center;
        gap: 1rem;
        padding: 0.85rem 1rem;
        border-radius: 12px;
        margin-bottom: 0.5rem;
        color: var(--text-secondary);
        transition: all 0.2s ease;
        cursor: pointer;
    }

    .sidebar nav ul li:hover, .sidebar nav ul li.active {
        background-color: var(--bg-hover);
        color: var(--text-primary);
    }

    .sidebar nav ul li.active {
        box-shadow: var(--shadow-deep);
        border: 1px solid var(--border-color);
    }

    /* Controls (Search & Filters) */
    .controls {
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .search-box {
        display: flex;
        align-items: center;
        background-color: var(--bg-card);
        padding: 0.75rem 1.25rem;
        border-radius: 16px;
        border: 1px solid var(--border-color);
        transition: border-color 0.2s;
    }

    .search-box:focus-within {
        border-color: var(--accent-info);
    }

    .search-box input {
        background: transparent;
        color: var(--text-primary);
        margin-left: 0.75rem;
        width: 100%;
        font-size: 1rem;
    }

    .filters {
        display: flex;
        gap: 0.5rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        border-radius: 20px;
        background-color: var(--bg-card);
        color: var(--text-secondary);
        font-size: 0.85rem;
        border: 1px solid var(--border-color);
        transition: all 0.2s;
    }

    .filter-btn:hover {
        background-color: var(--bg-hover);
    }

    .filter-btn.active {
        background-color: var(--accent-info);
        color: var(--bg-sidebar);
        border-color: var(--accent-info);
        font-weight: 600;
    }

    /* News Feed */
    .news-container {
        padding: 0 1.5rem 2rem;
        container-type: inline-size;
    }

    .news-feed {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* News Card */
    .news-card {
        background-color: var(--bg-card);
        border-radius: 20px;
        padding: 1.5rem;
        border: 1px solid var(--border-color);
        transition: transform 0.2s, box-shadow 0.2s;
        cursor: pointer;
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .news-card:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-deep);
        border-color: var(--text-muted);
    }

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

    .tag {
        font-size: 0.7rem;
        font-weight: 700;
        padding: 0.25rem 0.6rem;
        border-radius: 6px;
        text-transform: uppercase;
    }

    .tag.breaking { background-color: var(--accent-secondary); color: white; }
    .tag.announcement { background-color: var(--accent-info); color: white; }
    .tag.theme { background-color: var(--accent-primary); color: var(--bg-sidebar); }

    .timestamp { font-size: 0.8rem; color: var(--text-muted); }

    .news-title {
        font-size: 1.15rem;
        line-height: 1.4;
        font-weight: 600;
        color: var(--text-primary);
    }

    .news-summary {
        font-size: 0.9rem;
        color: var(--text-secondary);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    /* Right Panel Components */
    .index-cards {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
        margin-top: 1rem;
    }

    .index-card {
        background-color: var(--bg-card);
        padding: 1rem;
        border-radius: 16px;
        border: 1px solid var(--border-color);
        display: flex;
        flex-direction: column;
        gap: 0.25rem;
    }

    .index-card .name { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; }
    .index-card .value { font-size: 1.1rem; font-weight: 700; }
    .index-card .change { font-size: 0.85rem; font-weight: 600; }

    .change.positive { color: var(--accent-primary); }
    .change.negative { color: var(--accent-secondary); }

    .trending-stocks ol {
        margin-top: 1rem;
        counter-reset: stock-counter;
    }

    .trending-item {
        display: flex;
        align-items: center;
        padding: 0.75rem 0;
        border-bottom: 1px solid oklch(30% 0.03 250 / 0.5);
    }

    .trending-item::before {
        counter-increment: stock-counter;
        content: counter(stock-counter);
        font-weight: 800;
        color: var(--text-muted);
        width: 30px;
    }

    .trending-item:nth-child(-n+3)::before { color: var(--accent-info); }

    .trending-item .stock-info { flex: 1; }
    .trending-item .stock-name { display: block; font-size: 0.9rem; font-weight: 600; }
    .trending-item .stock-price { font-size: 0.8rem; color: var(--text-muted); }

    .trending-item .stock-change { font-weight: 700; font-size: 0.9rem; }

    /* Stock Ticker Custom Element Styling */
    stock-ticker {
        width: 100%;
        overflow: hidden;
        white-space: nowrap;
        display: flex;
        align-items: center;
    }

    /* Loading Shimmer Effect */
    .loading-shimmer {
        padding: 2rem;
        text-align: center;
        color: var(--text-muted);
        font-style: italic;
    }
}

@layer utilities {
    .hidden { display: none !important; }

    @container (min-width: 800px) {
        .news-feed {
            grid-template-columns: 1fr 1fr;
        }
    }

    /* Detailed Ranking View Styles */
    .ranking-header {
        margin-bottom: 2rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .ranking-header h2 {
        font-size: 1.75rem;
        color: var(--accent-info);
        margin-bottom: 0.5rem;
    }

    .ranking-header p {
        color: var(--text-muted);
        font-size: 0.95rem;
    }

    .detailed-ranking-list {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .ranking-row {
        background-color: var(--bg-card);
        border-radius: 16px;
        padding: 1.25rem 1.5rem;
        display: grid;
        grid-template-columns: 60px 2fr 1fr 1fr 1fr;
        align-items: center;
        border: 1px solid var(--border-color);
        transition: transform 0.2s, box-shadow 0.2s;
    }

    .ranking-row:hover {
        transform: scale(1.01);
        box-shadow: var(--shadow-deep);
        border-color: var(--accent-info);
    }

    .ranking-row .rank-num {
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--text-muted);
    }

    .ranking-row:nth-child(1) .rank-num { color: oklch(75% 0.15 80); } /* Gold */
    .ranking-row:nth-child(2) .rank-num { color: oklch(75% 0.05 250); } /* Silver */
    .ranking-row:nth-child(3) .rank-num { color: oklch(65% 0.1 50); } /* Bronze */

    .ranking-row .stock-name { font-weight: 700; font-size: 1.1rem; }
    .ranking-row .stock-price { color: var(--text-secondary); font-weight: 600; }
    .ranking-row .stock-change { font-weight: 700; text-align: right; }
    .ranking-row .action-btn {
        background-color: var(--bg-hover);
        color: var(--text-primary);
        padding: 0.5rem 1rem;
        border-radius: 8px;
        font-size: 0.8rem;
        text-align: center;
        margin-left: 1rem;
        cursor: pointer;
    }
}

/* Modal Styling */
.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal-content {
    background-color: var(--bg-card);
    width: 90%;
    max-width: 600px;
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    position: relative;
    box-shadow: var(--shadow-deep);
}

.close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 2rem;
    background: transparent;
    color: var(--text-muted);
}