* { box-sizing: border-box; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }
body { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); display: flex; justify-content: center; padding: 40px 16px; margin: 0; min-height: 100vh; }

@media (max-width: 768px) {
    body { padding: 20px 12px; }
    .box { padding: 24px 20px; }
    .box.wide { max-width: 100%; }
    table { font-size: 12px; }
    th, td { padding: 8px 6px; }
    .bar { flex-direction: column; align-items: stretch; }
    .bar form { width: 100%; }
    .bar input[type=number], .bar input[type=text] { width: 100%; }
}

.box { 
    background: #fff; 
    padding: 32px; 
    border-radius: 16px; 
    box-shadow: 0 10px 40px rgba(0,0,0,.15); 
    width: 100%; 
    max-width: 380px; 
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeInUp 0.5s ease-out;
}
.box:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0,0,0,.2);
}
.box.wide { max-width: 760px; }

h2 { margin-top: 0; color: #333; font-weight: 600; }

input { 
    width: 100%; 
    padding: 12px 16px; 
    margin: 8px 0; 
    border: 2px solid #e0e0e0; 
    border-radius: 8px; 
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}
input:focus {
    outline: none;
    border-color: #667eea;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

button, .btn { 
    display: inline-block; 
    padding: 12px 24px; 
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
    color: #fff; 
    border: none; 
    border-radius: 8px; 
    cursor: pointer; 
    text-decoration: none; 
    margin-top: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}
button:hover, .btn:hover { 
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}
button:active, .btn:active {
    transform: translateY(0);
}

.error { 
    color: #dc3545; 
    font-size: 14px; 
    margin: 6px 0; 
    padding: 10px;
    background: #fee;
    border-radius: 6px;
    border-left: 4px solid #dc3545;
    animation: shake 0.5s ease;
}
.success { 
    color: #28a745; 
    font-size: 14px;
    padding: 10px;
    background: #efe;
    border-radius: 6px;
    border-left: 4px solid #28a745;
}

.nav a { 
    color: #667eea; 
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}
.nav a:hover {
    color: #764ba2;
    text-decoration: underline;
}

table { 
    width: 100%; 
    border-collapse: collapse; 
    margin-top: 16px; 
    font-size: 14px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,.05);
}
th { 
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 14px 12px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
}
td { 
    padding: 12px; 
    border-bottom: 1px solid #eee; 
    text-align: left;
    transition: background 0.2s ease;
}
tr:hover td {
    background: #f8f9fa;
}

.pending { 
    color: #e6a700; 
    font-weight: 600;
    padding: 4px 10px;
    background: #fff3cd;
    border-radius: 20px;
    font-size: 12px;
}
.approved { 
    color: #28a745; 
    font-weight: 600;
    padding: 4px 10px;
    background: #d4edda;
    border-radius: 20px;
    font-size: 12px;
}
.rejected { 
    color: #dc3545; 
    font-weight: 600;
    padding: 4px 10px;
    background: #f8d7da;
    border-radius: 20px;
    font-size: 12px;
}

.btn-approve { 
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%); 
    padding: 8px 16px;
    margin-right: 6px;
}
.btn-approve:hover {
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}
.btn-reject { 
    background: linear-gradient(135deg, #dc3545 0%, #e83e8c 100%); 
    padding: 8px 16px;
}
.btn-reject:hover {
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.book { 
    padding: 24px; 
    border: 2px solid #e0e0e0; 
    border-radius: 12px;
    background: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);
    transition: all 0.3s ease;
    cursor: pointer;
}
.book:hover {
    border-color: #667eea;
    transform: scale(1.02);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.2);
}
.book h3 {
    color: #333;
    margin-bottom: 16px;
    font-size: 20px;
}

.hint { color: #666; font-size: 13px; margin: 6px 0; font-style: italic; }

.pw-wrap { position: relative; }
.pw-wrap input { padding-right: 50px; margin: 8px 0; }
.pw-eye { 
    position: absolute; 
    right: 12px; 
    top: 50%; 
    transform: translateY(-50%); 
    background: none; 
    border: none; 
    padding: 8px; 
    margin: 0; 
    cursor: pointer; 
    font-size: 18px; 
    color: #667eea;
    transition: color 0.3s ease, transform 0.3s ease;
}
.pw-eye:hover { 
    color: #764ba2;
    transform: translateY(-50%) scale(1.1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(102, 126, 234, 0); }
}