/* ============================================
   Blog Page Styles
   Inherits CSS vars from styles.css
   ============================================ */

/* --- Layout --- */
.blog-page {
    min-height: 100vh;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
}

.blog-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 15, 0.92);
    backdrop-filter: blur(16px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
}

.blog-nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.blog-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-primary);
    transition: var(--transition-normal);
    text-decoration: none;
}

.blog-back:hover {
    color: var(--accent-secondary);
    transform: translateX(-3px);
}

.blog-back svg {
    width: 18px;
    height: 18px;
    transition: var(--transition-normal);
}

.blog-back:hover svg {
    transform: translateX(-3px);
}

.blog-nav-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-decoration: none;
}

/* --- Hero Banner --- */
.blog-hero {
    padding: calc(var(--nav-height) + 60px) 24px 60px;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(99, 102, 241, 0.1) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 80%, rgba(239, 68, 68, 0.06) 0%, transparent 40%),
        radial-gradient(ellipse at 60% 20%, rgba(34, 197, 94, 0.05) 0%, transparent 35%);
    position: relative;
    overflow: hidden;
}

.blog-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(0deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.02) 2px,
            rgba(0, 0, 0, 0.02) 4px);
    pointer-events: none;
}

.blog-hero-inner {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.blog-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 24px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-secondary);
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease-out;
}

.blog-hero-badge .badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

.blog-hero h1 {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.blog-hero h1 .flag-emoji {
    -webkit-text-fill-color: initial;
}

.blog-hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 700px;
    margin-bottom: 28px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.blog-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.blog-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.blog-meta-item svg {
    width: 16px;
    height: 16px;
    color: var(--accent-primary);
}

.blog-stats {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.blog-stat {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.blog-stat .stat-val {
    color: var(--accent-secondary);
    font-weight: 600;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Main Content Layout --- */
.blog-layout {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 24px 80px;
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
    align-items: start;
}

/* --- Table of Contents --- */
.blog-toc {
    position: sticky;
    top: calc(var(--nav-height) + 24px);
}

.blog-toc h3 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toc-list a {
    display: block;
    padding: 8px 14px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    border-radius: 6px;
    border-left: 2px solid transparent;
    transition: var(--transition-fast);
    text-decoration: none;
    line-height: 1.4;
}

.toc-list a:hover,
.toc-list a.active {
    color: var(--accent-secondary);
    background: rgba(99, 102, 241, 0.06);
    border-left-color: var(--accent-primary);
}

.toc-list .toc-indent {
    padding-left: 28px;
    font-size: 0.72rem;
}

/* --- Article Body --- */
.blog-article {
    min-width: 0;
}

/* Section Headers */
.team-section {
    margin-bottom: 64px;
}

.team-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.06);
}

.team-icon {
    font-size: 2rem;
}

.team-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
}

.team-header .team-subtitle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.team-header--red h2 {
    color: #ef4444;
}

.team-header--blue h2 {
    color: #60a5fa;
}

/* --- Challenge Card --- */
.challenge-card {
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
    margin-bottom: 20px;
    overflow: hidden;
    transition: var(--transition-normal);
}

.challenge-card:hover {
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: 0 8px 32px -12px rgba(0, 0, 0, 0.4);
}

.challenge-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition-fast);
}

.challenge-header:hover {
    background: rgba(255, 255, 255, 0.02);
}

.challenge-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    min-width: 28px;
}

.challenge-title {
    font-size: 1.1rem;
    font-weight: 600;
    flex: 1;
}

.challenge-badges {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge--easy {
    background: rgba(34, 197, 94, 0.12);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.badge--medium {
    background: rgba(234, 179, 8, 0.12);
    color: #facc15;
    border: 1px solid rgba(234, 179, 8, 0.2);
}

.badge--hard {
    background: rgba(239, 68, 68, 0.12);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge--pts {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-secondary);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.badge--category {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.challenge-chevron {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.challenge-card.open .challenge-chevron {
    transform: rotate(180deg);
}

/* Challenge Body (collapsible) */
.challenge-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.challenge-card.open .challenge-body {
    max-height: 5000px;
}

.challenge-content {
    padding: 0 24px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    padding-top: 20px;
}

.challenge-target {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.challenge-target code {
    color: var(--accent-secondary);
}

/* Steps */
.steps-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.steps-list {
    counter-reset: step-counter;
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
}

.steps-list li {
    counter-increment: step-counter;
    position: relative;
    padding: 12px 0 12px 44px;
    color: var(--text-secondary);
    line-height: 1.7;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 0.925rem;
}

.steps-list li:last-child {
    border-bottom: none;
}

.steps-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 12px;
    width: 28px;
    height: 28px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-secondary);
}

.steps-list li code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    color: var(--accent-secondary);
}

.steps-list li strong {
    color: var(--text-primary);
}

/* Code Blocks */
.code-block {
    position: relative;
    margin: 16px 0;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.code-block-lang {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.code-block pre {
    padding: 18px 20px;
    margin: 0;
    overflow-x: auto;
    background: rgba(10, 10, 15, 0.6);
    font-family: var(--font-mono);
    font-size: 0.84rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.code-block pre code {
    color: inherit;
}

.code-block .code-comment {
    color: var(--text-muted);
}

.code-block .code-string {
    color: #4ade80;
}

.code-block .code-keyword {
    color: #c084fc;
}

.code-block .code-value {
    color: #f59e0b;
}

/* Inline Notes */
.note-block {
    display: flex;
    gap: 12px;
    padding: 14px 18px;
    margin: 16px 0;
    background: rgba(99, 102, 241, 0.06);
    border-left: 3px solid var(--accent-primary);
    border-radius: 0 8px 8px 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.note-block .note-icon {
    flex-shrink: 0;
    font-size: 1.1rem;
}

/* Payload Table */
.payload-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 0.875rem;
}

.payload-table th {
    text-align: left;
    padding: 10px 16px;
    background: var(--bg-tertiary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.payload-table td {
    padding: 10px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
}

.payload-table td code {
    font-family: var(--font-mono);
    font-size: 0.83em;
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    color: var(--accent-secondary);
}

/* Flag Reveal */
.flag-reveal {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    margin-top: 20px;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(99, 102, 241, 0.08) 100%);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: 10px;
}

.flag-reveal .flag-icon {
    font-size: 1.5rem;
}

.flag-reveal .flag-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

.flag-reveal .flag-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: #4ade80;
    user-select: all;
    word-break: break-all;
}

/* --- Scoring Summary --- */
.scoring-section {
    margin-top: 64px;
    padding-top: 48px;
    border-top: 2px solid rgba(255, 255, 255, 0.06);
}

.scoring-section h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.scoring-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.scoring-table thead th {
    padding: 14px 20px;
    background: var(--bg-tertiary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.scoring-table tbody td {
    padding: 14px 20px;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-size: 0.9rem;
}

.scoring-table tbody tr:last-child td {
    border-bottom: none;
    font-weight: 700;
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.06);
}

.scoring-table .score-highlight {
    color: var(--accent-secondary);
    font-family: var(--font-mono);
    font-weight: 600;
}

/* --- Blog Footer --- */
.blog-footer {
    text-align: center;
    padding: 48px 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.blog-footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 16px;
}

.blog-footer .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .blog-layout {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .blog-toc {
        position: relative;
        top: auto;
        margin-bottom: 32px;
        padding: 20px;
        background: var(--bg-secondary);
        border: 1px solid rgba(255, 255, 255, 0.06);
        border-radius: 12px;
    }

    .blog-stats {
        flex-wrap: wrap;
    }

    .challenge-header {
        flex-wrap: wrap;
        gap: 10px;
    }

    .challenge-badges {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
}

@media (max-width: 600px) {
    .blog-hero {
        padding: calc(var(--nav-height) + 32px) 16px 40px;
    }

    .blog-layout {
        padding: 24px 16px 60px;
    }

    .challenge-content {
        padding: 0 16px 16px;
    }

    .blog-meta {
        gap: 12px;
    }

    .blog-stat {
        padding: 8px 12px;
        font-size: 0.75rem;
    }
}

/* --- Intro section --- */
.blog-intro {
    margin-bottom: 48px;
    padding: 28px;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 14px;
}

.blog-intro h2 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.blog-intro p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

.blog-intro .default-creds {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 12px;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-muted);
}

.blog-intro .default-creds code {
    color: var(--accent-secondary);
    padding: 2px 6px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 4px;
}