/* Warna Utama */
:root {
    --primary-color: #F97316; /* Orange */
    --secondary-color: #4B5563; /* Gray */
    --light-gray: #F3F4F6;
    --white: #FFFFFF;
    --text-color: #1F2937;
    --border-radius: 8px;
}

/* Reset & Body */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: var(--light-gray);
    color: var(--text-color);
}

/* Layout Utama */
header {
    background-color: var(--white);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #E5E7EB;
}
header h1 { margin: 0; font-size: 1.5rem; }
header nav a {
    margin: 0 1rem;
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 500;
}
header nav a.logout-btn { color: var(--primary-color); }
main { padding: 2rem; max-width: 1200px; margin: auto; }

/* Form & Tombol */
.form-container {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}
input[type="text"], input[type="password"], textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #D1D5DB;
    border-radius: var(--border-radius);
}
button {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: bold;
}

/* Grid Topik */
.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}
.topic-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
}
.topic-card img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}
.topic-card h4, .topic-card p {
    margin: 0;
    padding: 0 1rem;
}
.topic-card h4 { margin-top: 1rem; }
.topic-card p { color: var(--secondary-color); font-size: 0.9rem; padding-bottom: 1rem; }
.topic-card .btn {
    display: block;
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    padding: 0.75rem;
    text-decoration: none;
    margin-top: auto;
}

/* Tabel */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}
th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #E5E7EB;
}
thead { background-color: var(--light-gray); }