/**
 * Academy Template Styles
 * Lesson page styles for Detaild Academy
 * Follows existing design system: dark theme, Manrope, blue/green accents
 */

/* ============================================
   HERO
   ============================================ */

.academy-hero {
    padding: 140px 0 60px;
    background: linear-gradient(180deg, rgba(160, 203, 255, 0.08) 0%, transparent 100%);
}

.academy-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.academy-course-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(160, 203, 255, 0.15);
    border: 1px solid rgba(160, 203, 255, 0.3);
    color: #A0CBFF;
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.02em;
}

.academy-course-badge .badge-icon {
    font-size: 1rem;
}

.academy-lesson-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.academy-lesson-meta .meta-separator {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
}

.academy-hero h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 0.75rem 0;
    line-height: 1.2;
}

.academy-hero-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

/* ============================================
   KEY TAKEAWAY
   ============================================ */

.academy-takeaway {
    background: linear-gradient(135deg, rgba(160, 203, 255, 0.12) 0%, rgba(160, 203, 255, 0.04) 100%);
    border: 1px solid rgba(160, 203, 255, 0.2);
    border-radius: 12px;
    padding: 1.5rem 1.75rem;
    margin-bottom: 2.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.academy-takeaway .takeaway-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: rgba(160, 203, 255, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.academy-takeaway .takeaway-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #A0CBFF;
    margin-bottom: 0.25rem;
}

.academy-takeaway .takeaway-text {
    font-size: 1.0625rem;
    color: #e2e8f0;
    font-weight: 500;
    line-height: 1.5;
    margin: 0;
}

/* ============================================
   LESSON BODY
   ============================================ */

.academy-body {
    padding: 0 0 3rem 0;
}

.academy-body-content {
    max-width: 760px;
    margin: 0 auto;
}

.academy-body-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin: 2.5rem 0 1rem 0;
}

.academy-body-content h2:first-child {
    margin-top: 0;
}

.academy-body-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #fff;
    margin: 2rem 0 0.75rem 0;
}

.academy-body-content p {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
    margin-bottom: 1.25rem;
}

.academy-body-content ul,
.academy-body-content ol {
    margin: 1rem 0 1.5rem 0;
    padding-left: 1.5rem;
}

.academy-body-content li {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.academy-body-content strong {
    color: #fff;
    font-weight: 600;
}

.academy-body-content a {
    color: #A0CBFF;
    text-decoration: none;
    border-bottom: 1px solid rgba(160, 203, 255, 0.3);
    transition: border-color 0.2s ease;
}

.academy-body-content a:hover {
    border-color: #A0CBFF;
}

/* ============================================
   DETAILING MATH CARD
   ============================================ */

.academy-math-card {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(34, 197, 94, 0.03) 100%);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: 12px;
    padding: 1.75rem;
    margin: 2rem 0;
}

.academy-math-card .math-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.academy-math-card .math-icon {
    width: 36px;
    height: 36px;
    background: rgba(34, 197, 94, 0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.academy-math-card .math-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #22C55E;
    margin: 0;
}

.academy-math-card .math-content {
    font-family: 'Manrope', monospace;
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.9;
    white-space: pre-line;
}

.academy-math-card .math-content .math-result {
    color: #22C55E;
    font-weight: 700;
    font-size: 1rem;
}

/* ============================================
   COMMON MISTAKES
   ============================================ */

.academy-mistakes {
    margin: 2.5rem 0;
}

.academy-mistakes .mistakes-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.academy-mistakes .mistakes-icon {
    font-size: 1.25rem;
}

.academy-mistakes .mistakes-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #fff;
    margin: 0;
}

.academy-mistake-item {
    background: rgba(239, 68, 68, 0.06);
    border: 1px solid rgba(239, 68, 68, 0.15);
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 0.75rem;
    transition: border-color 0.2s ease;
}

.academy-mistake-item:hover {
    border-color: rgba(239, 68, 68, 0.3);
}

.academy-mistake-item .mistake-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: #FCA5A5;
    margin-bottom: 0.5rem;
}

.academy-mistake-item .mistake-fix {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.6;
    margin: 0;
    padding-left: 1.625rem;
}

/* ============================================
   ACTION STEP
   ============================================ */

.academy-action {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0.04) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
    padding: 1.5rem 1.75rem;
    margin: 2rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.academy-action .action-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: rgba(59, 130, 246, 0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.academy-action .action-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #A0CBFF;
    margin-bottom: 0.25rem;
}

.academy-action .action-text {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   DO THIS IN DETAILD
   ============================================ */

.academy-detaild-tip {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.06) 0%, rgba(160, 203, 255, 0.06) 100%);
    border: 1px solid rgba(59, 130, 246, 0.15);
    border-left: 3px solid #A0CBFF;
    border-radius: 0 12px 12px 0;
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.academy-detaild-tip .detaild-tip-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: rgba(59, 130, 246, 0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.academy-detaild-tip .detaild-tip-icon img {
    width: 20px;
    height: 20px;
}

.academy-detaild-tip .detaild-tip-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #A0CBFF;
    margin-bottom: 0.25rem;
}

.academy-detaild-tip .detaild-tip-text {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin: 0;
}

.academy-detaild-tip .detaild-tip-text strong {
    color: #A0CBFF;
}

/* ============================================
   PRO TIP
   ============================================ */

.academy-pro-tip {
    background: rgba(34, 197, 94, 0.06);
    border-left: 3px solid #22C55E;
    border-radius: 0 12px 12px 0;
    padding: 1.25rem 1.5rem;
    margin: 2rem 0;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.academy-pro-tip .pro-tip-icon {
    flex-shrink: 0;
    font-size: 1.25rem;
}

.academy-pro-tip .pro-tip-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #22C55E;
    margin-bottom: 0.25rem;
}

.academy-pro-tip .pro-tip-text {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   FAQ SECTION
   ============================================ */

.academy-faq-section {
    padding: 3rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.academy-faq-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 1.5rem;
}

.academy-faq-list {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.academy-faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.academy-faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 1.25rem 0;
    cursor: pointer;
    background: none;
    border: none;
    color: inherit;
    font-family: inherit;
    text-align: left;
    transition: color 0.2s ease;
}

.academy-faq-question:hover {
    color: #A0CBFF;
}

.academy-faq-question h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    line-height: 1.4;
    padding-right: 1rem;
    margin: 0;
}

.academy-faq-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.academy-faq-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

.academy-faq-item.active .academy-faq-icon {
    transform: rotate(180deg);
}

.academy-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0;
}

.academy-faq-item.active .academy-faq-answer {
    max-height: 500px;
    padding: 0 0 1.25rem 0;
}

.academy-faq-answer p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    line-height: 1.7;
    margin: 0;
}

/* ============================================
   LESSON NAVIGATION
   ============================================ */

.academy-lesson-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.academy-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    color: #fff;
    text-decoration: none;
    transition: all 0.2s ease;
    max-width: 45%;
}

.academy-nav-link:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(160, 203, 255, 0.3);
}

.academy-nav-link.prev {
    flex-direction: row;
}

.academy-nav-link.next {
    flex-direction: row-reverse;
    text-align: right;
    margin-left: auto;
}

.academy-nav-link .nav-direction {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.125rem;
}

.academy-nav-link .nav-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.3;
}

.academy-nav-link .nav-arrow {
    flex-shrink: 0;
    color: rgba(255, 255, 255, 0.4);
}

/* ============================================
   RELATED LESSONS
   ============================================ */

.academy-related {
    padding: 2.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.academy-related h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 1rem;
}

.academy-related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.academy-related-card {
    display: block;
    padding: 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    color: #fff;
    text-decoration: none;
    transition: all 0.2s ease;
}

.academy-related-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(160, 203, 255, 0.3);
}

.academy-related-card .related-course {
    font-size: 0.75rem;
    font-weight: 600;
    color: #A0CBFF;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.375rem;
}

.academy-related-card .related-title {
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.4;
}

/* ============================================
   CROSS-LINKS
   ============================================ */

.academy-cross-links {
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.academy-cross-links h3 {
    font-size: 1rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 1rem;
}

.academy-cross-links-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.academy-cross-link {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.8125rem;
    transition: all 0.2s ease;
}

.academy-cross-link:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.15);
}

.academy-cross-link .link-type {
    font-size: 0.875rem;
}

/* ============================================
   CTA BANNER
   ============================================ */

.academy-cta {
    background: linear-gradient(135deg, rgba(160, 203, 255, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    border: 1px solid rgba(160, 203, 255, 0.2);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    margin: 2rem 0 0 0;
}

.academy-cta h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.75rem;
}

.academy-cta p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .academy-hero {
        padding: 120px 0 40px;
    }

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

    .academy-hero-subtitle {
        font-size: 1rem;
    }

    .academy-takeaway {
        flex-direction: column;
        gap: 0.75rem;
    }

    .academy-body-content h2 {
        font-size: 1.25rem;
    }

    .academy-body-content p {
        font-size: 1rem;
    }

    .academy-math-card {
        padding: 1.25rem;
    }

    .academy-lesson-nav {
        flex-direction: column;
    }

    .academy-nav-link {
        max-width: 100%;
        width: 100%;
    }

    .academy-nav-link.next {
        flex-direction: row;
        text-align: left;
    }

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

    .academy-cta {
        padding: 1.75rem;
    }

    .academy-action,
    .academy-pro-tip,
    .academy-detaild-tip {
        flex-direction: column;
        gap: 0.75rem;
    }
}

/* Partner brand inline pill — appears next to a brand name when sponsored: true
   in js/partner-brands.js. FTC-compliant disclosure adjacent to the mention. */
.partner-tag {
    display: inline-block;
    font-size: 0.7em;
    font-weight: 600;
    padding: 2px 6px;
    margin-left: 4px;
    border-radius: 4px;
    background: rgba(255, 215, 0, 0.15);
    color: #c9a800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    vertical-align: 2px;
}

/* ============================================
   INLINE SVG ICONS (emoji replacements)
   ============================================ */

.svg-icon {
    display: inline-block;
    vertical-align: -0.15em;
    width: 1em;
    height: 1em;
    flex-shrink: 0;
}

.svg-icon-success { color: var(--success, #22C55E); }
.svg-icon-danger  { color: var(--error,   #EF4444); }
.svg-icon-warning { color: var(--warning, #F59E0B); }
.svg-icon-primary { color: var(--primary, #A0CBFF); }