:root {
    /* Dark Mode (Default) */
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --accent-up: #00ff88;
    --accent-down: #ff4d4d;
    --nav-bg: #181818;
    --border-color: #333333;
    --ticker-bg: #000;
}

[data-theme="light"] {
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-up: #00aa5b;
    --accent-down: #e91e63;
    --nav-bg: #ffffff;
    --border-color: #e0e0e0;
    --ticker-bg: #f0f0f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 30px;
}

/* Header & Navigation */
header {
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.ticker-container {
    background-color: var(--ticker-bg);
    height: 35px;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.ticker-wrap {
    display: flex;
    white-space: nowrap;
    animation: ticker 30s linear infinite;
}

.ticker-item {
    padding: 0 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

@keyframes ticker {
    0% { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-up);
    letter-spacing: -1px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin: 0 15px;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-links a.active, .nav-links a:hover {
    color: var(--text-primary);
}

.search-bar input {
    background: var(--ticker-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 15px;
    border-radius: 20px;
    outline: none;
    width: 200px;
}

.theme-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background-color 0.3s;
}

.theme-btn:hover {
    background-color: var(--border-color);
}

/* Light mode adjustments */
[data-theme="light"] .news-image {
    background: linear-gradient(45deg, #e0eafc, #cfdef3);
    color: #888;
}

[data-theme="light"] .tag-list li {
    background: #e0e0e0;
}

/* News Grid */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.news-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border-color);
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.news-image {
    height: 180px;
    width: 100%;
    background: linear-gradient(45deg, #2c3e50, #000);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: #444;
}

.news-content {
    padding: 15px;
}

.news-category {
    font-size: 0.75rem;
    color: var(--accent-up);
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 5px;
}

.news-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

/* Sidebar */
.widget {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.widget h3 {
    font-size: 1rem;
    margin-bottom: 15px;
    border-left: 4px solid var(--accent-up);
    padding-left: 10px;
}

.tag-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-list li {
    background: #333;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    cursor: pointer;
}

.tag-list li:hover {
    background: var(--accent-up);
    color: black;
}

.watch-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #333;
}

.watch-item:last-child {
    border-bottom: none;
}

.price.up { color: var(--accent-up); }
.price.down { color: var(--accent-down); }

/* Footer */
footer {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

/* Responsive */
@media (max-width: 900px) {
    .container {
        grid-template-columns: 1fr;
    }
    nav {
        flex-direction: column;
        gap: 15px;
    }
    .search-bar input {
        width: 100%;
    }
}