:root {
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --accent-color: #0984e3;
    --banner-gradient: linear-gradient(135deg, #6c5ce7, #0984e3);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f2f6;
    --text-secondary: #bdc3c7;
    --accent-color: #74b9ff;
    --banner-gradient: linear-gradient(135deg, #1e272e, #2d3436);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: var(--transition);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 10%;
    background: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: transform 0.3s;
}

.btn-toggle:hover { transform: scale(1.2); }

/* Banner Digital */
.digital-banner {
    height: 400px;
    background: var(--banner-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding: 0 20px;
}

.banner-content h1 { font-size: 3rem; margin-bottom: 1rem; }

.search-bar {
    margin-top: 2rem;
    display: flex;
    background: white;
    padding: 5px;
    border-radius: 50px;
    max-width: 500px;
    margin-inline: auto;
}

.search-bar input {
    border: none;
    padding: 10px 20px;
    flex: 1;
    border-radius: 50px;
    outline: none;
}

.search-bar button {
    background: var(--accent-color);
    border: none;
    color: white;
    padding: 10px 25px;
    border-radius: 50px;
    cursor: pointer;
}

/* Grid & Cards */
.container { padding: 4rem 10%; }

.grid-articles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.card {
    background: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 30px rgba(0,0,0,0.15);
}

.card-img { height: 200px; background-size: cover; background-position: center; }

.card-body { padding: 1.5rem; }

.tag {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--accent-color);
    font-weight: bold;
    letter-spacing: 1px;
}

.card-body h3 { margin: 10px 0; }
.card-body p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.5rem; }

.read-more {
    text-decoration: none;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
}