/* --- General Styles --- */
body {
    font-family: 'Roboto', sans-serif;
    background-color: #f4f7f9;
    color: #333;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 20px;
    box-sizing: border-box;
}

.card {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    padding: 30px 40px;
    margin-top: 20px;
}

header { text-align: center; }
header h1 {
    color: #2c3e50;
    font-weight: 700;
}

footer {
    text-align: center;
    margin-top: 30px;
    font-size: 0.9em;
    color: #7f8c8d;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    font-size: 1em;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.btn-primary {
    background-color: #3498db; /* Blue */
    color: white;
}
.btn-primary:hover {
    background-color: #2980b9;
    box-shadow: 0 2px 5px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background-color: #e74c3c; /* Soft Red */
    color: white;
}
.btn-secondary:hover {
    background-color: #c0392b;
    box-shadow: 0 2px 5px rgba(231, 76, 60, 0.4);
}

/* --- Forms --- */
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}
.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1em;
    box-sizing: border-box;
}
.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* --- Messages --- */
.message {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}
.message.info { background-color: #eaf5ff; border: 1px solid #aed6f1; color: #2e86c1; }
.message.error { background-color: #feeeee; border: 1px solid #f5b7b1; color: #c0392b; }
.message.success { background-color: #e8f8f5; border: 1px solid #a9dfbf; color: #1e8449; }

/* --- Landing Page --- */
.landing-container form {
    display: flex;
    flex-direction: column;
}
.landing-container form button {
    margin-top: 10px;
    align-self: center;
}

/* --- Quiz Page --- */
.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}
.timer {
    background-color: #e74c3c;
    color: white;
    padding: 8px 15px;
    border-radius: 20px;
    font-weight: 500;
}
.question-counter { color: #7f8c8d; }
.question-text {
    margin: 15px 0 25px 0;
    font-size: 1.3em;
    line-height: 1.5;
}
.options .option {
    display: block;
    background-color: #f8f9fa;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 5px;
    border: 1px solid #e9ecef;
    cursor: pointer;
    transition: all 0.2s ease;
}
.options .option:hover {
    border-color: #3498db;
    background-color: #eaf5ff;
}
.options .option input[type="radio"] {
    margin-right: 15px;
}
.navigation-buttons {
    text-align: right;
    margin-top: 25px;
}

/* --- Admin --- */
.admin-container { max-width: 1200px; }
.admin-nav {
    display: flex;
    background: #fff;
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}
.admin-nav button {
    flex: 1;
    background: none;
    border: none;
    padding: 15px;
    font-size: 1em;
    font-weight: 500;
    color: #34495e;
    cursor: pointer;
    border-radius: 5px;
}
.admin-nav button.active, .admin-nav button:hover {
    background-color: #eaf5ff;
    color: #3498db;
}
.admin-tab-content { display: none; }
.admin-tab-content.active { display: block; }
.table-wrapper { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}
th {
    background-color: #f2f2f2;
    font-weight: 600;
}
tr:hover { background-color: #f9f9f9; }

/* Responsive Design */
@media (max-width: 600px) {
    .card { padding: 20px; }
    .quiz-header { flex-direction: column; gap: 10px; }
    .admin-nav { flex-direction: column; }
}