:root {
    --bg-main: #0f172a;
    --bg-card: rgba(15, 23, 42, 0.6);
    --border-card: rgba(255, 255, 255, 0.08);
    --accent-primary: #38bdf8;
    --accent-secondary: #818cf8;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-main);
    background-image:
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.12) 0, transparent 50%),
        radial-gradient(at 100% 0%, rgba(129, 140, 248, 0.12) 0, transparent 50%),
        radial-gradient(at 50% 50%, rgba(15, 23, 42, 1) 0, transparent 100%);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem;
    display: grid;
    grid-template-areas:
        "header header header"
        "ad-top ad-top ad-top"
        "calculator clock news"
        "ad-side clock news"
        "ad-bottom ad-bottom ad-bottom"
        "footer footer footer";
    grid-template-columns: 1fr 1fr 1.5fr;
    gap: 1.5rem;
}

header {
    grid-area: header;
    text-align: center;
    padding-bottom: 2rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-card);
    border-radius: 1.25rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    transform: translateY(-6px);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 25px 30px -5px rgba(0, 0, 0, 0.4);
}

.mono-nums {
    font-variant-numeric: tabular-nums;
    letter-spacing: -2px;
}

.source-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.4rem 0.9rem;
    background: rgba(56, 189, 248, 0.1);
    border-radius: 2rem;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.source-link:hover {
    background: var(--accent-primary);
    color: var(--bg-main);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.news-item {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 0.75rem;
    border-left: 4px solid var(--accent-secondary);
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.news-item:hover {
    background: rgba(255, 255, 255, 0.07);
    transform: translateX(6px);
}

.news-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.news-item span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.sponsored-tag::before {
    content: 'PATROCINADO';
    position: absolute;
    top: 0;
    left: 0;
    font-size: 0.55rem;
    font-weight: 800;
    background: var(--accent-primary);
    color: var(--bg-main);
    padding: 3px 10px;
    border-bottom-right-radius: 0.75rem;
    letter-spacing: 0.05rem;
}

.ad-placeholder {
    position: relative;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 1px solid var(--border-card);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15rem;
    border-radius: 1rem;
    overflow: hidden;
}

#ad-top {
    grid-area: ad-top;
    height: 100px;
}

#ad-side {
    grid-area: ad-side;
    height: calc(100% - 1.5rem);
    min-height: 400px;
}

#ad-bottom {
    grid-area: ad-bottom;
    height: 100px;
}

footer {
    grid-area: footer;
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--border-card);
    margin-top: 2rem;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .container {
        grid-template-areas:
            "header header"
            "ad-top ad-top"
            "calculator clock"
            "news news"
            "ad-side ad-bottom"
            "footer footer";
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-areas:
            "header"
            "clock"
            "calculator"
            "news"
            "ad-top"
            "ad-side"
            "ad-bottom"
            "footer";
        grid-template-columns: 1fr;
    }
}