/**
 * CS Quest - Modern Design System Components
 */

/* Cards */
.cs-card {
    background: var(--cs-surface);
    border: 1px solid var(--cs-border);
    border-radius: var(--cs-radius-lg);
    padding: 24px;
    box-shadow: var(--cs-card-shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    position: relative;
    overflow: hidden;
}

.cs-card:hover {
    box-shadow: var(--cs-card-hover-shadow);
    transform: translateY(-3px);
    border-color: rgba(59, 130, 246, 0.4);
}

/* Two Big Primary Choice Cards (Learning vs Tuitions) */
.cs-primary-choices-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin: 30px 0 40px;
}

@media (min-width: 768px) {
    .cs-primary-choices-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
}

.cs-choice-card {
    background: var(--cs-surface);
    border-radius: var(--cs-radius-lg);
    padding: 36px 30px;
    border: 2px solid var(--cs-border);
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.cs-choice-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
}

.cs-choice-card-learning::before {
    background: linear-gradient(90deg, #10b981, #06b6d4, #3b82f6);
}

.cs-choice-card-tuitions::before {
    background: linear-gradient(90deg, #8b5cf6, #ec4899, #f59e0b);
}

.cs-choice-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.15);
}

.cs-choice-card-learning:hover {
    border-color: #10b981;
}

.cs-choice-card-tuitions:hover {
    border-color: #8b5cf6;
}

.cs-choice-icon {
    font-size: 3.5rem;
    line-height: 1;
    margin-bottom: 20px;
    display: inline-block;
}

.cs-choice-title {
    font-size: 2rem;
    font-weight: 800;
    margin: 0 0 10px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.cs-choice-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0 24px;
}

.cs-pill {
    background: var(--cs-surface-alt);
    border: 1px solid var(--cs-border);
    padding: 4px 12px;
    border-radius: var(--cs-radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--cs-text-muted);
}

/* Callout Boxes */
.cs-callout {
    padding: 18px 22px;
    border-radius: var(--cs-radius-md);
    margin: 20px 0;
    border-left: 5px solid;
}

.cs-callout-info {
    background: var(--cs-info-bg);
    border-color: var(--cs-info);
    color: #1e3a8a;
}
[data-theme="dark"] .cs-callout-info {
    background: rgba(59, 130, 246, 0.15);
    color: #bfdbfe;
}

.cs-callout-tip {
    background: var(--cs-success-bg);
    border-color: var(--cs-success);
    color: #064e3b;
}
[data-theme="dark"] .cs-callout-tip {
    background: rgba(16, 185, 129, 0.15);
    color: #a7f3d0;
}

.cs-callout-warning {
    background: var(--cs-warning-bg);
    border-color: var(--cs-warning);
    color: #78350f;
}
[data-theme="dark"] .cs-callout-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #fde68a;
}

/* Code & Pseudocode Display */
.cs-code-box {
    background: #0f172a;
    color: #e2e8f0;
    border-radius: var(--cs-radius-md);
    padding: 20px;
    font-family: var(--cs-font-mono);
    font-size: 0.95rem;
    line-height: 1.6;
    overflow-x: auto;
    margin: 20px 0;
    border: 1px solid #334155;
    position: relative;
}

.cs-code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #334155;
    padding-bottom: 8px;
    margin-bottom: 12px;
    font-size: 0.8rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cs-code-content {
    white-space: pre-wrap;
    word-break: break-word;
}

/* Worked Example Steps */
.cs-worked-example {
    background: var(--cs-surface);
    border: 1px solid var(--cs-border);
    border-radius: var(--cs-radius-lg);
    padding: 24px;
    margin: 25px 0;
}

.cs-example-step {
    border-left: 2px dashed var(--cs-primary);
    margin-left: 15px;
    padding-left: 20px;
    padding-bottom: 20px;
    position: relative;
}

.cs-example-step::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--cs-primary);
}

.cs-example-step:last-child {
    border-left: transparent;
    padding-bottom: 0;
}

/* Question Component Styles */
.cs-question-box {
    background: var(--cs-surface);
    border: 2px solid var(--cs-border);
    border-radius: var(--cs-radius-lg);
    padding: 26px;
    margin: 30px 0;
    box-shadow: var(--cs-card-shadow);
}

.cs-question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.cs-options-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 20px 0;
}

.cs-option-label {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--cs-surface-alt);
    border: 2px solid var(--cs-border);
    border-radius: var(--cs-radius-md);
    padding: 14px 18px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    min-height: 48px;
}

.cs-option-label:hover {
    border-color: var(--cs-primary);
    background: var(--cs-surface);
    transform: translateX(4px);
}

.cs-option-label.cs-selected {
    border-color: var(--cs-primary);
    background: rgba(59, 130, 246, 0.1);
}

.cs-option-label.cs-correct {
    border-color: var(--cs-success);
    background: var(--cs-success-bg);
    color: #065f46;
}

.cs-option-label.cs-wrong {
    border-color: var(--cs-danger);
    background: var(--cs-danger-bg);
    color: #991b1b;
}

.cs-feedback-box {
    display: none;
    padding: 18px;
    border-radius: var(--cs-radius-md);
    margin-top: 18px;
    animation: csFadeIn 0.3s ease-out;
}

@keyframes csFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}