/*
 * css/style.css
 * Desain Responsif, Modern, dan Bersih untuk PKBM Celah Cahaya
 */

/* --- Variabel & Reset Dasar --- */
:root {
    --primary-color: #007bff;      /* Biru terang untuk aksi utama/branding */
    --secondary-color: #6c757d;    /* Abu-abu untuk teks sekunder */
    --background-color: #f4f7f9;   /* Latar belakang bersih */
    --card-bg: #ffffff;            /* Latar belakang kartu */
    --font-stack: 'Poppins', sans-serif;
    --shadow-light: 0 6px 16px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-stack);
    background-color: var(--background-color);
    color: #333;
    line-height: 1.6;
}

/* --- Layout Dashboard (Menu Samping/Sidebar) --- */
#sidebar {
    width: 250px;
    background-color: var(--card-bg);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    height: 100vh;
    position: fixed;
    transition: width 0.3s, transform 0.3s;
    overflow-y: auto;
    padding-top: 20px;
}

.nav-logo {
    display: block;
    width: 100px;
    height: auto;
    margin: 0 auto 40px;
}

#sidebar a {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: #333;
    text-decoration: none;
    font-weight: 500;
    border-left: 4px solid transparent;
    transition: background-color 0.2s, border-left-color 0.2s;
}

#sidebar a:hover, #sidebar a.active {
    background-color: #e9ecef;
    border-left-color: var(--primary-color);
    color: var(--primary-color);
}

#content {
    margin-left: 250px;
    padding: 30px;
    transition: margin-left 0.3s;
}

/* Header Konten */
header {
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

header h2 {
    color: #212529;
    font-weight: 700;
}

/* --- Kartu (Card) Modern --- */
.card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-light);
    margin-bottom: 20px;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-2px);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

/* --- Halaman Login/Daftar (index.html, daftar.html) --- */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
}

.auth-card {
    max-width: 400px;
    width: 90%;
    text-align: center;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.logo-auth {
    width: 120px;
    margin-bottom: 25px;
}

/* --- Form Elements --- */
input {
    width: 100%;
    padding: 14px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    transition: border-color 0.3s;
}

input:focus {
    border-color: var(--primary-color);
    outline: none;
}

/* --- Tombol Aksi --- */
.btn-primary {
    background-color: var(--primary-color);
    color: white;
    padding: 14px 25px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.3s, transform 0.1s;
    width: 100%;
    text-decoration: none;
    display: block;
    text-align: center;
}

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-1px);
}

.switch-link {
    margin-top: 20px;
    font-size: 0.9em;
}

.switch-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* --- Kelas & Ebook Tampilan Kartu --- */
.class-selection-grid, .ebook-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.class-card, .ebook-item {
    padding: 25px;
    text-align: center;
    border-radius: 12px;
    border: 1px solid #e0e0e0;
    text-decoration: none;
    color: #333;
    font-weight: 600;
    transition: all 0.3s;
    background-color: var(--card-bg);
}

.class-card:hover, .ebook-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-light);
    transform: scale(1.03);
}

.class-card h3 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

/* Meet List */
.meet-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    margin-bottom: 15px;
    border-radius: 10px;
    border-left: 5px solid #28a745; /* Garis hijau untuk meet */
    background: #e9f7ec;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.btn-join {
    background-color: #28a745; 
    color: white;
    padding: 8px 15px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9em;
    font-weight: 600;
}

/* Laporan (Tabel) */
.laporan-box {
    overflow-x: auto; /* Untuk responsif tabel */
}

#absenTable, #tugasTable {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

#absenTable th, #tugasTable th {
    background-color: var(--primary-color);
    color: white;
    padding: 12px;
    text-align: left;
}

#absenTable td, #tugasTable td {
    border: 1px solid #eee;
    padding: 10px;
}


/* --- Responsif Mobile (Di bawah 768px) --- */
@media (max-width: 768px) {
    
    /* 1. Dashboard: Ubah Sidebar menjadi Menu Atas/Header Responsif */
    #sidebar {
        width: 100%;
        height: auto;
        position: static;
        display: flex;
        justify-content: space-around;
        align-items: center;
        padding: 10px 0;
        overflow-x: auto;
        white-space: nowrap;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }

    #content {
        margin-left: 0;
        padding: 20px;
    }
    
    .nav-logo, .nav-footer { /* Sembunyikan Logo besar di mobile */
        display: none !important;
    }

    #sidebar a {
        padding: 10px 10px;
        font-size: 0.85em;
        border-left: none;
        border-bottom: 3px solid transparent;
    }
    
    #sidebar a:hover, #sidebar a.active {
        border-left-color: transparent;
        border-bottom-color: var(--primary-color);
    }
    
    /* 2. Halaman Auth */
    .auth-page {
        padding: 20px;
    }

    .auth-card {
        padding: 30px 20px;
    }

    /* 3. Grid Konten */
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    /* 4. Meet Item */
    .meet-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .btn-join {
        margin-top: 10px;
        width: 100%;
    }
}