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

:root {
    --primary-color: #17a2b8; /* Cyan */
    --secondary-color: #28a745; /* Green */
    --accent-color: #ffc107; /* Yellow */
    --danger-color: #dc3545; /* Red */
    --bg-light: #f4f4f4;
    --text-dark: #333;
}

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    padding: 20px;
    max-width: 1200px;
    margin: 80px auto 20px auto;
}

/* Header & Navigasi (Responsif) */
.header {
    background-color: var(--primary-color);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.logo a {
    color: white;
    text-decoration: none;
    font-size: 1.8em;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    gap: 15px;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 8px 12px;
    transition: background-color 0.3s;
    border-radius: 4px;
}

.nav-menu a:hover, .nav-menu a.active {
    background-color: #138496;
}

.btn-auth {
    background-color: var(--accent-color);
    color: var(--text-dark);
    border-radius: 5px;
    padding: 8px 15px !important;
    font-weight: bold;
}

.hamburger {
    display: none;
    font-size: 1.8em;
    cursor: pointer;
}

/* Form Styling & Buttons */
.form-container {
    max-width: 450px;
    margin: 50px auto;
    padding: 30px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.btn-primary {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1.1em;
    transition: background-color 0.3s;
}
.btn-primary:hover { background-color: #1e7e34; }

/* Search Section */
.search-section {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}
.search-section input {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
.search-section button {
    padding: 10px 20px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
.search-section button:hover { background-color: #138496; }
.filter-options { font-size: 0.85em; color: #666; margin-top: 5px; width: 100%; }


/* ROOT VARIABLES & GENERAL STYLES - TETAP */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary-color: #17a2b8; /* Cyan */
    --secondary-color: #28a745; /* Green */
    --accent-color: #ffc107; /* Yellow */
    --danger-color: #dc3545; /* Red */
    --bg-light: #f4f4f4;
    --text-dark: #333;
    --raw-blue: #007bff; /* Biru mentah, sering digunakan untuk link/primary */
}

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    padding: 20px;
    max-width: 1200px;
    margin: 80px auto 20px auto;
}

/* ... HEADER, NAVIGASI, FORM, SEARCH STYLES DIBIARKAN TETAP ... */

/* =====================================================
Book Card Styling (Responsif Grid) - MODIFIKASI BERAT
===================================================== 
*/
.book-list {
    display: grid; 
    /* Lebar kolom default: 170px */
    grid-template-columns: repeat(auto-fit, 170px); 
    gap: 20px;
    justify-content: center;
    text-align: center;
}

.book-card {
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    width: 170px; 
    /* * Hapus margin vertikal/padding yang mungkin menyebabkan jarak. 
     * Karena card adalah container utama, kita fokus pada img.
     */
}
.book-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

/* =====================================================
Cover Styling - MODIFIKASI 
(Menghilangkan Jarak Atas & Mengatur Berat)
===================================================== 
*/
.book-card img {
    /* 1. Menghilangkan jarak di atas (Hapus margin top) */
    display: block; 
    margin: 0 auto; /* Margin 0 di semua sisi, auto kiri/kanan untuk pusat */
    border-radius: 8px;
    /* 2. Ukuran tetap dan berat (weight) sama dengan card (170px) */
    width: 170px; /* Diambil dari lebar book-card */
    height: 255px; /* Proporsi standar 2:3 (170x255) atau 3:4 (170x226) -> kita pakai 255px agar buku terlihat tinggi */
    
    /* Elastis (Full Cover) */
    object-fit: fill; 
    
    /* PENTING: Karena card di-overflow: hidden, card img akan 
     * mengisi penuh lebar card 170px, dan tinggi 255px. 
     * Ini memastikan "weight" card dan cover sama di bagian lebar.
     */
}

.book-card .book-info {
    padding: 10px 15px 15px 15px; 
}

.book-card h3 {
    font-size: 1.15em; 
    color: var(--raw-blue); 
    font-weight: 700; 
    margin-bottom: 5px;
    white-space: nowrap;     
    overflow: hidden;       
    text-overflow: ellipsis;  
}
.book-card p {
    font-size: 0.85em; 
    color: #666;
}

@media (max-width: 768px) {
    /* Perangkat Kecil (Mobile) */
    .book-list {
        grid-template-columns: repeat(auto-fit, 130px); 
        gap: 15px;
    }
    .book-card {
        width: 130px; /* Sesuaikan lebar card */
    }

    /* Cover menjadi setengah ukuran dan sama beratnya dengan card */
    .book-card img {
        width: 130px; /* Sama dengan lebar card (130px) */
        height: 195px; /* Proporsi 2:3 (130x195) */
        margin-top: 0;
        
    }

    .book-card .book-info {
        padding: 8px 10px 10px 10px; 
    }

    .book-card h3 {
        font-size: 0.8em; 
        height: 20px;
    }
    .book-card p {
        font-size: 0.7em; 
    }
}

/* Media Query untuk Layar Lebar */
@media (min-width: 1200px) {
    .book-list {
  
        justify-content: center; 
    }
}
/* Detail Buku (buka_buku.html) - Responsif */
.detail-flex {
    display: flex;
    gap: 30px;
    flex-wrap: wrap; /* Pastikan wrap di layar kecil */
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}
.detail-cover {
    flex: 0 0 250px; /* Ukuran cover tetap di layar besar */
    text-align: center;
}
.detail-cover img {
    width: 100%;
    aspect-ratio: 2 / 3;
    border-radius: 8px;
    object-fit: contain
}
.detail-info {
    flex-grow: 1;
    min-width: 300px;
}
.detail-actions button {
    margin-right: 10px;
    padding: 10px 15px;
    cursor: pointer;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    margin-top: 10px;
    transition: opacity 0.3s;
}
.detail-actions .bookmarked { background-color: var(--accent-color); color: var(--text-dark); }


/* Status Pinjam Styling */
.status-card {
    background: white;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    display: flex;
    gap: 15px;
    align-items: center;
}
.status-card img {
    width: 60px;
    height: 90px;
    object-fit: cover;
    border-radius: 4px;
}
.status-pinjam {
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 4px;
    display: inline-block;
    color: white;
    font-size: 0.9em;
}

/* Warna Status */
.status-diajukan { background-color: #ffc107; color: #333; }
.status-diacc { background-color: #17a2b8; }
.status-dipinjam { background-color: #007bff; }
.status-ditolak, .status-dibatalkan { background-color: #6c757d; }
.status-dikembalikan { background-color: #28aa45; }
.status-telat { background-color: var(--danger-color); color: yellow; animation: blinker 1s linear infinite; }

/* Admin Styling */
.admin-card {
    border-left: 5px solid var(--primary-color);
    margin-bottom: 15px !important;
    padding: 15px;
    background: #fff;
    border-radius: 4px;
}

/* --- TOMBOL AKSI ADMIN DENGAN JARAK ATAS/BAWAH --- */
.btn-action {
    /* Membuat tombol berada di barisnya sendiri dan menghormati margin vertikal */
    display: block; 
    
    /* Jarak atas dan bawah pada setiap tombol */
    margin-top: 5px; 
    margin-bottom: 5px; 
    
    /* Styling dasar */
    width: 100%;
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.3s;
}

/* Warna spesifik untuk setiap aksi */
.btn-action.acc { 
    background-color: var(--secondary-color); /* Green */
    color: white;
}
.btn-action.acc:hover { background-color: #1e7e34; }

.btn-action.tolak, .btn-action.batal { 
    background-color: var(--danger-color); /* Red */
    color: white; 
}
.btn-action.tolak:hover, .btn-action.batal:hover { background-color: #a71d2a; }

.btn-action.pinjam { 
    background-color: var(--primary-color); /* Cyan */
    color: white; 
}
.btn-action.pinjam:hover { background-color: #138496; }

.btn-action.kembali { 
    background-color: #007bff; /* Blue */
    color: white;
}
.btn-action.kembali:hover { background-color: #0056b3; }
/* ------------------------------------------------ */


/* Media Queries (Responsif) */
@media (max-width: 768px) {
    /* Menu Burger */
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: var(--primary-color);
        padding-bottom: 10px;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }
    .nav-menu.active {
        display: flex;
    }
    .nav-menu a {
        margin: 5px 20px;
        padding: 10px 0;
        border-bottom: 1px solid #138496;
        text-align: center;
    }
    .nav-menu a:last-child {
        border-bottom: none;
    }
    .hamburger {
        display: block;
    }
    
    /* Search Section */
    .search-section {
        flex-direction: column;
    }
    .search-section button {
        width: 100%;
    }

    /* Book Detail */
    .detail-cover {
        flex: 1 1 100%; /* Cover ambil lebar penuh */
    }
    .detail-cover img {
        max-width: 200px; /* Batasi lebar cover agar tidak terlalu besar */
        margin: auto;
    }
    .detail-info {
        min-width: 100%;
    }
}