/* ============================================
   KNOWPASS — Custom Styles
   Colors: Navy #1A2E4A, Blue #2563EB
   ============================================ */

:root {
    --kp-navy: #1A2E4A;
    --kp-navy-light: #243B5C;
    --kp-blue: #2563EB;
    --kp-blue-light: #3B82F6;
    --kp-cbt: #2563EB;
    --kp-tools: #0D9488;
    --kp-info: #D97706;
    --kp-success: #16A34A;
    --kp-danger: #DC2626;
    --kp-gray: #6B7280;
    --kp-light: #F9FAFB;
    --kp-border: #E5E7EB;
}

/* ─── Global ─────────────────────────────── */
body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #1F2937;
    background-color: #F9FAFB;
}

a {
    color: var(--kp-blue);
    text-decoration: none;
}

a:hover {
    color: var(--kp-navy);
}

/* ─── Navbar ─────────────────────────────── */
.bg-navy {
    background-color: var(--kp-navy) !important;
}

.text-primary-accent {
    color: var(--kp-blue-light) !important;
}

.text-light-muted {
    color: #9CA3AF !important;
}

.text-light-muted:hover {
    color: #D1D5DB !important;
}

.navbar-nav .nav-link {
    transition: color 0.2s, border-bottom-color 0.2s;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid transparent;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.section-cbt {
    color: var(--kp-cbt) !important;
    border-bottom-color: var(--kp-cbt);
}

.navbar-nav .nav-link.section-tools {
    color: var(--kp-tools) !important;
    border-bottom-color: var(--kp-tools);
}

.navbar-nav .nav-link.section-info {
    color: var(--kp-info) !important;
    border-bottom-color: var(--kp-info);
}

/* ─── Hero Section ───────────────────────── */
.hero-section {
    background: linear-gradient(135deg, var(--kp-navy) 0%, var(--kp-navy-light) 100%);
    color: white;
    padding: 4rem 0;
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 800;
}

.hero-section .lead {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* ─── Section Cards ──────────────────────── */
.section-card {
    border: none;
    border-radius: 12px;
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
}

.section-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.section-card .card-header {
    border: none;
    padding: 1rem 1.5rem;
    font-weight: 700;
    color: white;
}

.section-card .card-body {
    padding: 1.5rem;
}

.bg-cbt { background-color: var(--kp-cbt); }
.bg-tools { background-color: var(--kp-tools); }
.bg-info-section { background-color: var(--kp-info); }

.text-cbt { color: var(--kp-cbt); }
.text-tools { color: var(--kp-tools); }
.text-info-section { color: var(--kp-info); }

.border-cbt { border-color: var(--kp-cbt) !important; }
.border-tools { border-color: var(--kp-tools) !important; }
.border-info-section { border-color: var(--kp-info) !important; }

/* ─── Section Badges ─────────────────────── */
.badge-cbt {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--kp-cbt);
    font-weight: 600;
}

.badge-tools {
    background-color: rgba(13, 148, 136, 0.1);
    color: var(--kp-tools);
    font-weight: 600;
}

.badge-info {
    background-color: rgba(217, 119, 6, 0.1);
    color: var(--kp-info);
    font-weight: 600;
}

/* ─── Qualification Cards ────────────────── */
.qual-card {
    border: 1px solid var(--kp-border);
    border-radius: 12px;
    transition: all 0.2s;
    background: white;
}

.qual-card:hover {
    border-color: var(--kp-blue);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

.qual-card .card-body {
    padding: 1.25rem;
}

/* ─── Tool Cards ─────────────────────────── */
.tool-card {
    border: 1px solid var(--kp-border);
    border-radius: 12px;
    transition: all 0.2s;
    background: white;
    text-decoration: none;
    color: inherit;
    display: block;
}

.tool-card:hover {
    border-color: var(--kp-tools);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.1);
    color: inherit;
}

.tool-card .tool-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background-color: rgba(13, 148, 136, 0.1);
    color: var(--kp-tools);
}

/* ─── Calculator Pages ───────────────────── */
.calc-container {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.calc-result {
    background: linear-gradient(135deg, var(--kp-navy) 0%, var(--kp-navy-light) 100%);
    color: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.calc-result .result-amount {
    font-size: 2rem;
    font-weight: 800;
}

.calc-result .result-label {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* ─── CBT Exam ───────────────────────────── */
.exam-header {
    background: var(--kp-navy);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.exam-timer {
    font-size: 1.5rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.exam-timer.warning {
    color: #FCA5A5;
    animation: pulse 1s infinite;
}

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

.question-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
}

.question-grid .q-btn {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    border: 1px solid var(--kp-border);
    background: white;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}

.question-grid .q-btn.answered {
    background: var(--kp-blue);
    color: white;
    border-color: var(--kp-blue);
}

.question-grid .q-btn.flagged {
    background: #F59E0B;
    color: white;
    border-color: #F59E0B;
}

.question-grid .q-btn.current {
    outline: 2px solid var(--kp-navy);
    outline-offset: 1px;
}

.option-btn {
    display: block;
    width: 100%;
    text-align: left;
    padding: 1rem 1.25rem;
    border: 2px solid var(--kp-border);
    border-radius: 10px;
    background: white;
    cursor: pointer;
    transition: all 0.15s;
    margin-bottom: 0.5rem;
}

.option-btn:hover {
    border-color: var(--kp-blue-light);
    background-color: rgba(37, 99, 235, 0.03);
}

.option-btn.selected {
    border-color: var(--kp-blue);
    background-color: rgba(37, 99, 235, 0.08);
    font-weight: 600;
}

.option-btn .option-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--kp-light);
    font-weight: 700;
    font-size: 0.875rem;
    margin-right: 0.75rem;
}

.option-btn.selected .option-label {
    background: var(--kp-blue);
    color: white;
}

/* ─── Result Page ────────────────────────── */
.result-card {
    border-radius: 16px;
    overflow: hidden;
}

.result-card .score-display {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
}

.result-card .pass-badge {
    font-size: 1.25rem;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
}

/* ─── Wrong Answer Accordion ─────────────── */
.wrong-answer-item {
    border: 1px solid var(--kp-border);
    border-radius: 10px;
    margin-bottom: 0.75rem;
    overflow: hidden;
}

.wrong-answer-item .accordion-button {
    background-color: #FEF2F2;
    font-weight: 600;
}

.wrong-answer-item .accordion-button:not(.collapsed) {
    background-color: #FEE2E2;
}

/* ─── Info Cards ─────────────────────────── */
.info-card {
    border: 1px solid var(--kp-border);
    border-radius: 12px;
    background: white;
    transition: all 0.2s;
}

.info-card:hover {
    border-color: var(--kp-info);
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.1);
}

/* ─── Ad Slot ────────────────────────────── */
.ad-placeholder {
    background: repeating-linear-gradient(
        45deg,
        #F3F4F6,
        #F3F4F6 10px,
        #E5E7EB 10px,
        #E5E7EB 20px
    ) !important;
}

/* ─── Page Header ────────────────────────── */
.page-header {
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-weight: 800;
    font-size: 2rem;
}

.page-header .breadcrumb {
    font-size: 0.875rem;
}

/* ─── Category Tabs ──────────────────────── */
.category-tabs .nav-link {
    color: var(--kp-gray);
    border: 1px solid var(--kp-border);
    border-radius: 50px;
    padding: 0.4rem 1rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

.category-tabs .nav-link:hover,
.category-tabs .nav-link.active {
    background-color: var(--kp-blue);
    color: white;
    border-color: var(--kp-blue);
}

/* ─── Share Button ───────────────────────── */
.share-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border: 1px solid var(--kp-border);
    border-radius: 8px;
    background: white;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.share-btn:hover {
    background-color: var(--kp-light);
    border-color: var(--kp-blue);
}

/* ─── Loading Spinner ────────────────────── */
.loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}

.loading-spinner .spinner-border {
    width: 3rem;
    height: 3rem;
    color: var(--kp-blue);
}

/* ─── Responsive ─────────────────────────── */
@media (max-width: 768px) {
    .hero-section {
        padding: 2.5rem 0;
    }

    .hero-section h1 {
        font-size: 1.75rem;
    }

    .question-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .calc-container {
        padding: 1.25rem;
    }

    .result-card .score-display {
        font-size: 3rem;
    }

    .exam-timer {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .question-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .question-grid .q-btn {
        width: 32px;
        height: 32px;
        font-size: 0.7rem;
    }
}

/* ─── Utility ────────────────────────────── */
.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.fw-800 { font-weight: 800; }

.rounded-xl { border-radius: 16px; }

.bg-gradient-navy {
    background: linear-gradient(135deg, var(--kp-navy) 0%, var(--kp-navy-light) 100%);
}