/* --- 1. Pengaturan Variabel Warna (Mode Terang/Default) --- */
:root {
    --bg-main: #f0f4f8;
    --bg-card: #ffffff;
    --bg-header: linear-gradient(135deg, #1e3c72, #2a5298);
    --bg-nav: #0f172a;
    --bg-table-header: #f1f5f9;
    --bg-table-hover: #f8fafc;
    --bg-card-pengurus: #f8fafc;
    --text-color: #333333;
    --text-heading: #1e293b;
    --text-sub: #64748b;
    --border-color: #e2e8f0;
    --accent-color: #38bdf8;
    --shadow: 0 4px 12px rgba(0,0,0,0.05);
}

/* --- 2. Pengaturan Variabel Warna (Mode Gelap) --- */
[data-theme="dark"] {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-header: linear-gradient(135deg, #0f172a, #1e293b);
    --bg-nav: #020617;
    --bg-table-header: #334155;
    --bg-table-hover: #334155;
    --bg-card-pengurus: #334155;
    --text-color: #e2e8f0;
    --text-heading: #38bdf8;
    --text-sub: #94a3b8;
    --border-color: #475569;
    --accent-color: #38bdf8;
    --shadow: 0 4px 12px rgba(0,0,0,0.4);
}

/* --- 3. Pengaturan Dasar & Smooth Scroll --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 50px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- 4. Header --- */
header {
    background: var(--bg-header);
    color: white;
    text-align: center;
    padding: 45px 20px;
}

header h1 {
    font-size: 2.2rem;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

header p {
    font-size: 1rem;
    opacity: 0.9;
}

/* --- 5. Menu Navigasi --- */
nav {
    background-color: var(--bg-nav);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

nav a {
    color: #e2e8f0;
    padding: 15px 18px;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

nav a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
}

/* Tombol Mode Gelap di Navigasi */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid #475569;
    color: #e2e8f0;
    padding: 6px 14px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    margin: 8px 10px;
    transition: all 0.3s ease;
}

.theme-toggle-btn:hover {
    background: var(--accent-color);
    color: #0f172a;
    border-color: var(--accent-color);
}

/* --- 6. Main Container --- */
main {
    max-width: 900px;
    margin: 20px auto;
    padding: 0 15px;
}

.container {
    background: var(--bg-card);
    margin-bottom: 25px;
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.container:hover {
    transform: translateY(-4px);
}

.container h2 {
    color: var(--text-heading);
    margin-bottom: 18px;
    border-bottom: 3px solid var(--accent-color);
    display: inline-block;
    padding-bottom: 5px;
    font-size: 1.4rem;
}

/* --- 7. Tabel --- */
.piket-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

.piket-table th, .piket-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.piket-table th {
    background-color: var(--bg-table-header);
    color: var(--text-heading);
    font-weight: 700;
}

.piket-table tr:hover {
    background-color: var(--bg-table-hover);
}

/* --- 8. Grid Kartu Pengurus --- */
.grid-struktur {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.card-pengurus {
    background: var(--bg-card-pengurus);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
}

.card-pengurus .jabatan {
    font-size: 0.85rem;
    color: var(--text-sub);
    font-weight: 600;
    text-transform: uppercase;
}

.card-pengurus .nama {
    font-size: 1.1rem;
    color: var(--text-heading);
    font-weight: 700;
    margin-top: 4px;
}

/* --- 9. Tombol Aspirasi --- */
.btn-aspirasi {
    display: inline-block;
    background: #10b981;
    color: white;
    padding: 12px 28px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    margin-top: 15px;
    transition: background 0.3s ease, transform 0.2s ease;
}

.btn-aspirasi:hover {
    background: #059669;
    transform: scale(1.02);
}

/* --- 10. Footer --- */
footer {
    text-align: center;
    margin-top: 40px;
    color: var(--text-sub);
    font-size: 0.85rem;
}
/* --- Highlight Piket Hari Ini --- */
.piket-today {
    background-color: rgba(56, 189, 248, 0.25) !important;
    font-weight: bold;
    border-left: 5px solid var(--accent-color);
}