/* ===================== WRITEUPS SHARED STYLES ===================== */

/* ---- Breadcrumb ---- */
.breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 1.5rem 0 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.breadcrumb a { color: var(--green); text-decoration: none; }
.breadcrumb a:hover { text-shadow: 0 0 8px var(--green-glow); }
.breadcrumb-sep { color: var(--text-muted); }

/* ---- Category badges ---- */
.cat-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 1px solid;
}
.cat-ml       { color: var(--purple);  border-color: rgba(139,92,246,0.4);  background: rgba(139,92,246,0.08); }
.cat-web      { color: var(--cyan);    border-color: rgba(0,212,255,0.4);   background: rgba(0,212,255,0.08); }
.cat-pwn      { color: #ff3b3b;        border-color: rgba(255,59,59,0.4);   background: rgba(255,59,59,0.08); }
.cat-rev      { color: #f97316;        border-color: rgba(249,115,22,0.4);  background: rgba(249,115,22,0.08); }
.cat-crypto   { color: var(--gold);    border-color: rgba(251,191,36,0.4);  background: rgba(251,191,36,0.08); }
.cat-osint    { color: var(--green);   border-color: rgba(0,255,65,0.2);    background: rgba(0,255,65,0.05); }
.cat-forensics{ color: #14b8a6;        border-color: rgba(20,184,166,0.4);  background: rgba(20,184,166,0.08); }
.cat-misc     { color: var(--text-muted); border-color: rgba(255,255,255,0.15); background: rgba(255,255,255,0.04); }
.cat-hardware { color: #d97706;           border-color: rgba(217,119,6,0.4);   background: rgba(217,119,6,0.08); }

/* ---- Writeup screenshots ---- */
.writeup-img {
    width: 100%;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.08);
    margin: 1rem 0;
    display: block;
}
.writeup-img-caption {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: -0.5rem;
    margin-bottom: 1rem;
}

/* ===================== WRITEUPS INDEX PAGE ===================== */

.writeups-hero {
    min-height: 35vh;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem;
    position: relative;
}
.writeups-hero-content { max-width: 900px; margin: 0 auto; width: 100%; }
.writeups-hero-tag {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--green);
    margin-bottom: 1rem;
    opacity: 0.7;
}
.writeups-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 1rem;
}
.writeups-hero-title span { color: var(--green); }
.writeups-hero-sub {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}
.writeups-stats {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}
.writeups-stat {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}
.writeups-stat-value {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--green);
}
.writeups-stat-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ---- Filter bar ---- */
.writeups-filters {
    padding: 0 2rem 2.5rem;
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}
.filter-btn {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.35rem 0.9rem;
    border-radius: 3px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.filter-btn:hover, .filter-btn.active {
    border-color: var(--green);
    color: var(--green);
    background: rgba(0,255,65,0.05);
}

/* ---- Writeup cards grid ---- */
.writeups-grid {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem 6rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.5rem;
}
.writeup-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: border-color 0.2s, transform 0.2s;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    position: relative;
    overflow: hidden;
}
.writeup-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,255,65,0.03) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
}
.writeup-card:hover { border-color: rgba(0,255,65,0.25); transform: translateY(-2px); }
.writeup-card:hover::before { opacity: 1; }

.writeup-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.writeup-ctf-name {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.writeup-card-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}
.writeup-card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}
.writeup-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.4rem;
    padding-top: 0.8rem;
    border-top: 1px solid var(--border);
}
.writeup-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.writeup-card-date {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}
.writeup-rank-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--bronze);
    border: 1px solid rgba(205,127,50,0.3);
    background: rgba(205,127,50,0.08);
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
}
.writeup-read-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--green);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: gap 0.2s;
}
.writeup-card:hover .writeup-read-link { gap: 0.5rem; }

/* ===================== INDIVIDUAL WRITEUP PAGE ===================== */

.writeup-page { padding-top: 5rem; }

.writeup-challenge-header {
    background: linear-gradient(180deg, rgba(0,255,65,0.04) 0%, transparent 100%);
    border-bottom: 1px solid var(--border);
    padding: 3rem 2rem 2.5rem;
}
.writeup-challenge-inner {
    max-width: 1100px;
    margin: 0 auto;
}
.writeup-challenge-tags {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}
.writeup-challenge-ctf {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}
.writeup-challenge-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}
.writeup-challenge-meta-row {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}
.writeup-meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}
.writeup-meta-key {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.writeup-meta-val {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.writeup-meta-val.accent { color: var(--green); }

/* ---- Two-column layout ---- */
.writeup-layout {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.5rem 2rem 6rem;
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 3rem;
    align-items: start;
}
.writeup-content { min-width: 0; }
.writeup-sidebar { position: sticky; top: 5.5rem; display: flex; flex-direction: column; gap: 1.5rem; }

/* ---- Sidebar blocks ---- */
.sidebar-block {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}
.sidebar-block-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--green);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--border);
    background: rgba(0,255,65,0.04);
}
.sidebar-block-body { padding: 1rem; }

/* Table of contents */
.toc-list { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }
.toc-list a {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
    border-left: 2px solid transparent;
    padding-left: 0.6rem;
    transition: all 0.15s;
}
.toc-list a:hover, .toc-list a.active {
    color: var(--green);
    border-left-color: var(--green);
}
.toc-num { color: var(--text-muted); opacity: 0.5; font-size: 0.65rem; }

/* Metadata in sidebar */
.meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.78rem;
}
.meta-row:last-child { border-bottom: none; }
.meta-row-key { font-family: var(--font-mono); color: var(--text-muted); font-size: 0.68rem; }
.meta-row-val { color: var(--text-secondary); font-weight: 500; text-align: right; }

/* Challenge files */
.file-list { display: flex; flex-direction: column; gap: 0.5rem; }
.file-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: rgba(255,255,255,0.02);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: border-color 0.15s, color 0.15s;
}
.file-item:hover { border-color: rgba(0,255,65,0.3); color: var(--green); }
.file-icon { color: var(--cyan); flex-shrink: 0; }
.file-size { margin-left: auto; color: var(--text-muted); font-size: 0.65rem; }

/* ---- Writeup article content ---- */
.writeup-section { margin-bottom: 3rem; }
.writeup-section-title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--green);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.writeup-section-title::before {
    content: '';
    display: block;
    width: 3px;
    height: 1em;
    background: var(--green);
    border-radius: 2px;
    box-shadow: 0 0 8px var(--green);
}
.writeup-section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, rgba(0,255,65,0.3) 0%, transparent 100%);
}
.writeup-h2 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 2rem 0 0.8rem;
}
.writeup-p {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}
.writeup-p code {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--cyan);
    background: rgba(0,212,255,0.08);
    padding: 0.1em 0.4em;
    border-radius: 3px;
    border: 1px solid rgba(0,212,255,0.15);
}

/* ---- Methodology steps ---- */
.steps { display: flex; flex-direction: column; gap: 1.2rem; margin-bottom: 1.5rem; }
.step {
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
    padding: 1.2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s;
}
.step:hover { border-color: rgba(0,255,65,0.2); }
.step-num {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    border: 1px solid rgba(0,255,65,0.3);
    background: rgba(0,255,65,0.07);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--green);
}
.step-body { flex: 1; min-width: 0; }
.step-title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}
.step-desc {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* ---- Code blocks ---- */
.code-block {
    margin: 1.2rem 0;
    border-radius: 6px;
    border: 1px solid var(--border);
    overflow: hidden;
    background: #0d0d12;
}
.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid var(--border);
}
.code-block-lang {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.code-block-file {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}
.code-block pre {
    margin: 0;
    padding: 1.2rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.7;
    color: #e2e8f0;
}
.code-block pre .c  { color: #64748b; }       /* comment */
.code-block pre .s  { color: #86efac; }       /* string */
.code-block pre .k  { color: var(--purple); } /* keyword */
.code-block pre .n  { color: var(--cyan); }   /* name/function */
.code-block pre .nb { color: var(--green); }  /* built-in */
.code-block pre .mi { color: #f97316; }       /* number */
.code-block-copy {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: color 0.15s;
    padding: 0;
}
.code-block-copy:hover { color: var(--green); }

/* ---- Terminal output block ---- */
.terminal-output {
    margin: 1.2rem 0;
    border-radius: 6px;
    border: 1px solid rgba(0,255,65,0.2);
    overflow: hidden;
    background: #070a07;
}
.terminal-output-header {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.8rem;
    background: rgba(0,255,65,0.06);
    border-bottom: 1px solid rgba(0,255,65,0.15);
}
.terminal-output-header span {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--green);
    opacity: 0.6;
}
.terminal-output pre {
    margin: 0;
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.7;
    color: var(--green);
    overflow-x: auto;
}
.terminal-output .cmd { color: var(--cyan); }
.terminal-output .out { color: rgba(0,255,65,0.7); }
.terminal-output .err { color: #ff3b3b; }
.terminal-output .flag { color: var(--gold); font-weight: 700; }

/* ---- Images ---- */
.writeup-img-wrap {
    margin: 1.5rem 0;
    border-radius: 6px;
    border: 1px solid var(--border);
    overflow: hidden;
    background: var(--surface);
}
.writeup-img-wrap img {
    width: 100%;
    display: block;
    max-height: 500px;
    object-fit: contain;
    background: #0d0d12;
}
.writeup-img-caption {
    padding: 0.6rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.writeup-img-caption::before {
    content: 'fig.';
    color: var(--green);
    opacity: 0.6;
}

/* ---- Flag reveal ---- */
.flag-box {
    margin: 2rem 0;
    padding: 1.5rem;
    border: 1px solid rgba(251,191,36,0.3);
    border-radius: 8px;
    background: rgba(251,191,36,0.05);
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.flag-box-icon { color: var(--gold); flex-shrink: 0; }
.flag-box-content { flex: 1; min-width: 0; }
.flag-box-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--gold);
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0.4rem;
}
.flag-box-value {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--gold);
    font-weight: 600;
    word-break: break-all;
}

/* ---- Info / warning callouts ---- */
.callout {
    margin: 1.2rem 0;
    padding: 1rem 1.2rem;
    border-radius: 6px;
    border-left: 3px solid;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-secondary);
}
.callout-info  { border-color: var(--cyan);   background: rgba(0,212,255,0.06); }
.callout-warn  { border-color: var(--gold);   background: rgba(251,191,36,0.06); }
.callout-tip   { border-color: var(--green);  background: rgba(0,255,65,0.05); }
.callout-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.4rem;
    display: block;
}
.callout-info  .callout-label { color: var(--cyan); }
.callout-warn  .callout-label { color: var(--gold); }
.callout-tip   .callout-label { color: var(--green); }

/* ---- Responsive ---- */
@media (max-width: 860px) {
    .writeup-layout {
        grid-template-columns: 1fr;
    }
    .writeup-sidebar {
        position: static;
        order: -1;
    }
    .writeups-grid {
        grid-template-columns: 1fr;
    }
}