/* ACME Exam Platform - Core Styles */
/* Theme system is in theme.css - this file contains utility styles */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Grid Layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Center Content */
.center-content {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
}

/* Results Page */
.results-card {
    text-align: center;
    padding: 3rem;
}

.score-display {
    font-size: 4rem;
    font-weight: bold;
    color: var(--primary);
    margin: 1rem 0;
}

.score-display.pass {
    color: var(--success);
}

.score-display.fail {
    color: var(--error);
}

/* Question Navigation for Exams */
.question-nav {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.question-nav button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.question-nav button:hover {
    border-color: var(--primary);
}

.question-nav button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.question-nav button.answered {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.question-nav button.marked {
    border-color: var(--warning);
    background: var(--warning-light);
    color: #92400E;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-surface);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* Tables */
.table-container {
    overflow-x: auto;
    background: var(--bg-surface);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

table {
    width: 100%;
    border-collapse: collapse;
}

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

table th {
    background: var(--bg-surface-hover);
    font-weight: 600;
    color: var(--text-secondary);
}

table tr:hover {
    background: var(--bg-surface-hover);
}

/* Exam Interface */
.exam-container {
    max-width: 900px;
    margin: 0 auto;
}

.exam-timer.warning {
    color: var(--warning);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.question-card {
    margin-bottom: 1.5rem;
}

.options-list {
    list-style: none;
}

.options-list li {
    margin-bottom: 0.75rem;
}

.options-list label {
    display: flex;
    align-items: center;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-surface);
    color: var(--text-primary);
}

.options-list label:hover {
    background: var(--bg-surface-hover);
    border-color: var(--primary);
}

.options-list input[type="radio"] {
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.options-list input[type="radio"]:checked + span {
    color: var(--primary);
    font-weight: 500;
}

.options-list input[type="radio"]:checked ~ label {
    border-color: var(--primary);
    background: var(--selected-answer-bg);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 3rem;
    background: var(--bg-surface);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .grid {
        grid-template-columns: 1fr;
    }

    .exam-header {
        flex-direction: column;
        gap: 1rem;
    }

    nav {
        flex-direction: column;
    }

    nav a {
        text-align: center;
    }

    .pagination {
        gap: 0.25rem;
    }

    .pagination-btn {
        min-width: 32px;
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
}

/* Pagination */
.pagination-wrapper {
    margin-top: 1.5rem;
}

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    flex-wrap: wrap;
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-surface);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(.disabled):not(.active) {
    background: var(--bg-surface-hover);
    border-color: var(--primary);
    color: var(--primary);
}

.pagination-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--text-inverse);
}

.pagination-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-ellipsis {
    padding: 0 0.25rem;
    color: var(--text-muted);
    font-weight: 500;
}

.pagination-info {
    text-align: center;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}