/* ============================================================
   blog.css — Shared stylesheet for all blog posts
   Masaaki Stephane · masaaki.tech/blog
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img { max-width: 100%; height: auto; display: block; }

/* ── CSS Variables — Dark (default) ── */
:root {
  --bg:         #0f0f0f;
  --bg2:        #161616;
  --bg3:        #1e1e1e;
  --bg4:        #121212;
  --border:     #262626;
  --border2:    #333;
  --text:       #c9c9c9;
  --text2:      #e0e0e0;
  --muted:      #666;
  --muted2:     #a0a0a0;
  --white:      #f0f0f0;
  --red:        #e5534b;
  --red-dim:    rgba(229,83,75,0.12);
  --green:      #3fb950;
  --green-dim:  rgba(63,185,80,0.1);
  --blue:       #58a6ff;
  --blue-dim:   rgba(88,166,255,0.1);
  --yellow:     #d29922;
  --yellow-dim: rgba(210,153,34,0.1);
  --orange:     #f0883e;
  --purple:     #bc8cff;
  --code-bg:    #1f2937;
  --code-text:  #abb2bf;
  --card-bg:    #1e1e1e;
  --header-gradient: linear-gradient(90deg, #0d0d0d, #161616);
}

/* ── Light theme override ── */
body.light-theme {
  --bg:         #ffffff;
  --bg2:        #f9f9f9;
  --bg3:        #f0f0f0;
  --bg4:        #f5f5f5;
  --border:     #e0e0e0;
  --border2:    #d0d0d0;
  --text:       #333333;
  --text2:      #222222;
  --muted:      #777777;
  --muted2:     #999999;
  --white:      #111111;
  --code-bg:    #282c34;
  --code-text:  #abb2bf;
  --card-bg:    #f8f8f8;
  --header-gradient: linear-gradient(90deg, #1a1a2e, #16213e);
}

/* ── Base ── */
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  transition: background 0.2s, color 0.2s;
}

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

/* ============================================================
   NAVIGATION
   ============================================================ */
nav.blog-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15,15,15,0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
body.light-theme nav.blog-nav { background: rgba(255,255,255,0.96); }

.nav-logo { font-size: 0.9rem; font-weight: 600; color: var(--white); letter-spacing: 0.5px; text-decoration: none; }
.nav-logo:hover { color: var(--white); text-decoration: none; }
.nav-back {
  font-size: 0.82rem; color: var(--muted);
  display: flex; align-items: center; gap: 6px;
  transition: color 0.2s;
}
.nav-back:hover { color: var(--white); text-decoration: none; }
.nav-back svg { flex-shrink: 0; }

/* ── Theme toggle in nav ── */
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.theme-toggle {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; font-size: 0.78rem; color: var(--muted);
  background: none; border: 1px solid var(--border);
  padding: 4px 10px; border-radius: 20px;
  transition: color 0.2s, border-color 0.2s;
}
.theme-toggle:hover { color: var(--white); border-color: var(--muted); }
.theme-checkbox { display: none; }

/* ============================================================
   PAGE LAYOUT
   ============================================================ */
.page,
.container,
.blog-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.5rem 6rem;
}

.blog-container-wide { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem 6rem; }

/* ── Legacy container used in older posts ── */
.container { width: 92%; max-width: 900px; margin: 0 auto; padding: 2rem 1.5rem; }

/* ============================================================
   POST HEADER
   ============================================================ */
.post-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.post-meta {
  display: flex; align-items: center; gap: 0.75rem;
  flex-wrap: wrap; margin-bottom: 1.5rem;
}

.post-date { font-size: 0.8rem; color: var(--muted); }

.post-header h1,
.blog-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700; color: var(--white);
  line-height: 1.25; margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.post-header .lead,
.post-intro {
  font-size: 1.05rem; color: var(--muted2); line-height: 1.75;
}

/* ── Blog post page header (older style) ── */
.blog-header {
  background: var(--header-gradient);
  color: #fff; padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}
.blog-header h1 { font-size: clamp(1.5rem, 4vw, 2.2rem); font-weight: 700; margin-bottom: 0.75rem; }
.blog-header .subtitle { font-size: 1rem; opacity: 0.75; }

/* ── Tags / badges ── */
.tag, .badge {
  display: inline-block;
  font-size: 0.7rem; letter-spacing: 2px; text-transform: uppercase;
  padding: 3px 10px; border-radius: 2px; font-weight: 500;
}
.tag-red, .badge-red     { background: var(--red-dim);    color: var(--red);    border: 1px solid rgba(229,83,75,0.25); }
.tag-blue, .badge-blue   { background: var(--blue-dim);   color: var(--blue);   border: 1px solid rgba(88,166,255,0.2); }
.tag-green, .badge-green { background: var(--green-dim);  color: var(--green);  border: 1px solid rgba(63,185,80,0.2); }
.tag-yellow              { background: var(--yellow-dim); color: var(--yellow); border: 1px solid rgba(210,153,34,0.2); }

/* ============================================================
   TABLE OF CONTENTS
   ============================================================ */
.toc {
  background: var(--bg2); border: 1px solid var(--border);
  border-left: 3px solid var(--red);
  padding: 1.5rem 1.75rem; margin-bottom: 3rem; border-radius: 2px;
}
.toc h3 {
  font-size: 0.75rem; letter-spacing: 2px; text-transform: uppercase;
  color: var(--muted); margin-bottom: 1rem; font-weight: 500;
}
.toc ol, .toc ul { padding-left: 1.2rem; }
.toc li { font-size: 0.88rem; margin-bottom: 0.35rem; color: var(--text); }
.toc a { color: var(--text); }
.toc a:hover { color: var(--white); text-decoration: none; }

/* ============================================================
   CONTENT TYPOGRAPHY
   ============================================================ */
.post-content h2,
.blog-content h2 {
  font-size: 1.45rem; font-weight: 700; color: var(--white);
  margin: 3.5rem 0 1rem; padding-top: 1rem;
  letter-spacing: -0.015em;
  border-top: 1px solid var(--border);
}

.post-content h3,
.blog-content h3 {
  font-size: 1.05rem; font-weight: 600; color: var(--white);
  margin: 2.5rem 0 0.75rem;
}

.post-content h4,
.blog-content h4 {
  font-size: 0.9rem; font-weight: 600; color: var(--muted2);
  margin: 1.75rem 0 0.5rem;
  text-transform: uppercase; letter-spacing: 1px;
}

.post-content p,
.blog-content p { margin-bottom: 1.25rem; color: var(--text); font-size: 0.97rem; }

.post-content ul, .post-content ol,
.blog-content ul, .blog-content ol {
  padding-left: 1.4rem; margin-bottom: 1.25rem;
}
.post-content li,
.blog-content li { margin-bottom: 0.4rem; font-size: 0.97rem; }

.post-content strong, .blog-content strong { color: var(--white); font-weight: 600; }
.post-content em, .blog-content em { color: #bbb; font-style: italic; }

/* ── Legacy heading colours (older posts) ── */
h2 { color: var(--blue); }
h3 { color: #79c0ff; }
h4 { color: #a5d6ff; }
.post-content h2, .post-content h3, .post-content h4,
.blog-content h2,  .blog-content h3,  .blog-content h4 { color: inherit; }

/* ============================================================
   CODE
   ============================================================ */
code {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.82rem;
  background: var(--bg3); color: #e06c75;
  padding: 2px 6px; border-radius: 3px;
}

pre {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 4px; padding: 1.25rem 1.5rem;
  overflow-x: auto; margin: 1.5rem 0;
}
pre code {
  background: none; color: var(--code-text);
  padding: 0; font-size: 0.83rem; line-height: 1.7;
}

/* Syntax highlight helpers */
.hl-key   { color: #c678dd; }
.hl-val   { color: #98c379; }
.hl-com   { color: #5c6370; font-style: italic; }
.hl-url   { color: #61afef; }
.hl-str   { color: #98c379; }
.hl-num   { color: #d19a66; }
.hl-fn    { color: #61afef; }

/* ============================================================
   CALLOUT BOXES  (new style + legacy .note/.warning/.tip/.danger)
   ============================================================ */
.callout,
.note, .warning, .tip, .danger, .info-box {
  border-radius: 3px; padding: 1rem 1.25rem;
  margin: 1.75rem 0; font-size: 0.92rem; border-left: 3px solid;
}

/* New callout variants */
.callout-red    { background: var(--red-dim);    border-color: var(--red); }
.callout-green  { background: var(--green-dim);  border-color: var(--green); }
.callout-blue   { background: var(--blue-dim);   border-color: var(--blue); }
.callout-yellow { background: var(--yellow-dim); border-color: var(--yellow); }

.callout strong {
  display: block; margin-bottom: 0.3rem;
  font-size: 0.75rem; letter-spacing: 1.5px; text-transform: uppercase;
}
.callout-red strong    { color: var(--red); }
.callout-green strong  { color: var(--green); }
.callout-blue strong   { color: var(--blue); }
.callout-yellow strong { color: var(--yellow); }

/* Legacy variants */
.note    { background: var(--blue-dim);   border-color: var(--blue);   color: var(--text); }
.warning { background: var(--yellow-dim); border-color: var(--yellow); color: var(--text); }
.danger  { background: var(--red-dim);    border-color: var(--red);    color: var(--text); }
.tip     { background: var(--green-dim);  border-color: var(--green);  color: var(--text); }

.note strong, .info-box strong    { color: var(--blue);   }
.warning strong                   { color: var(--yellow); }
.danger strong                    { color: var(--red);    }
.tip strong                       { color: var(--green);  }

/* ============================================================
   ATTACK CARDS
   ============================================================ */
.attack {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 4px; margin: 2.5rem 0; overflow: hidden;
}
.attack-header {
  background: var(--bg3); padding: 0.85rem 1.25rem;
  display: flex; align-items: center; gap: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.attack-number {
  font-family: 'JetBrains Mono', monospace; font-size: 0.75rem;
  color: var(--red); font-weight: 500;
  background: var(--red-dim); padding: 2px 8px; border-radius: 2px;
}
.attack-title { font-size: 0.9rem; font-weight: 600; color: var(--white); }
.attack-body { padding: 1.25rem 1.5rem; }
.attack-body p { margin-bottom: 0.9rem; font-size: 0.92rem; }
.attack-body p:last-child { margin-bottom: 0; }

/* ── Generic section card (burpsuite post style) ── */
.section, .content-section {
  background: var(--bg4); padding: 2.5rem;
  border-radius: 8px; margin-bottom: 2rem;
  border: 1px solid var(--border2);
}

/* ============================================================
   NUMBERED STEPS
   ============================================================ */
.steps {
  counter-reset: step; list-style: none; padding: 0; margin: 1rem 0 1.25rem;
}
.steps li {
  counter-increment: step; display: flex; gap: 0.85rem;
  margin-bottom: 0.85rem; font-size: 0.92rem;
}
.steps li::before {
  content: counter(step);
  min-width: 24px; height: 24px;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; color: var(--red); font-weight: 600;
  font-family: 'JetBrains Mono', monospace; flex-shrink: 0; margin-top: 2px;
}

/* ── Roadmap steps (server-side attacks style) ── */
.roadmap { padding-left: 0; list-style: none; counter-reset: roadmap; }
.roadmap-step {
  counter-increment: roadmap; position: relative;
  padding: 1.25rem 1.25rem 1.25rem 3.5rem; margin-bottom: 1rem;
  background: var(--bg2); border: 1px solid var(--border); border-radius: 4px;
}
.roadmap-step::before {
  content: counter(roadmap);
  position: absolute; left: 1rem; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--red-dim); border: 1px solid var(--red);
  color: var(--red); font-size: 0.75rem; font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  display: flex; align-items: center; justify-content: center;
}

/* ============================================================
   FIX / PREVENTION GRID
   ============================================================ */
.fix-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem; margin: 1.25rem 0;
}
.fix-item {
  background: var(--bg2); border: 1px solid var(--border);
  border-top: 2px solid var(--green);
  padding: 1rem 1.1rem; border-radius: 2px;
}
.fix-item h4 {
  font-size: 0.78rem; color: var(--green);
  text-transform: uppercase; letter-spacing: 1px; margin-bottom: 0.5rem;
}
.fix-item p { font-size: 0.85rem; color: var(--muted); margin: 0; }

/* ============================================================
   NETWORK DIAGRAM (MITM post)
   ============================================================ */
.network-diagram {
  display: flex; align-items: center; justify-content: center;
  gap: 0; flex-wrap: wrap; margin: 2rem 0;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; padding: 2rem;
}
.network-node {
  text-align: center; padding: 1rem 1.5rem;
  background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 8px; min-width: 100px;
}
.network-node .node-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.network-node .node-label { font-size: 0.8rem; color: var(--muted2); }
.network-arrow {
  font-size: 1.5rem; color: var(--muted); padding: 0 0.5rem;
}
.mitm-node {
  border: 2px solid var(--red) !important;
  background: rgba(94, 42, 42, 0.3) !important;
}
.mitm-node .node-label { color: var(--red) !important; }

/* ============================================================
   TABLES
   ============================================================ */
table {
  width: 100%; border-collapse: collapse;
  margin: 1.5rem 0; font-size: 0.9rem;
  border: 1px solid var(--border2);
}
thead { background: var(--bg3); }
th {
  padding: 0.75rem 1rem; text-align: left;
  font-weight: 600; color: var(--white);
  border-bottom: 2px solid var(--border2);
  font-size: 0.85rem; letter-spacing: 0.5px;
}
td {
  padding: 0.65rem 1rem; color: var(--text);
  border-bottom: 1px solid var(--border);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: var(--bg2); }
tbody tr:hover { background: var(--bg3); }

/* ============================================================
   TOOLTIP
   ============================================================ */
.tooltip {
  position: relative; cursor: help;
  border-bottom: 1px dotted var(--muted);
}
.tooltip::after {
  content: attr(data-tip);
  position: absolute; bottom: 120%; left: 50%;
  transform: translateX(-50%);
  background: var(--bg3); color: var(--text);
  border: 1px solid var(--border2);
  padding: 0.4rem 0.75rem; border-radius: 4px;
  font-size: 0.78rem; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity 0.15s;
  z-index: 10;
}
.tooltip:hover::after { opacity: 1; }

/* ============================================================
   IMAGES & MEDIA
   ============================================================ */
.post-content img,
.blog-content img,
.blog-image {
  width: 100%; border-radius: 4px;
  border: 1px solid var(--border); margin: 1.5rem 0;
}
.image-caption {
  text-align: center; font-size: 0.8rem;
  color: var(--muted); margin-top: -1rem; margin-bottom: 1.5rem;
}

/* ============================================================
   READING PROGRESS BAR
   ============================================================ */
.reading-progress {
  position: fixed; top: 0; left: 0; z-index: 200;
  height: 2px; width: 0%;
  background: var(--red);
  transition: width 0.1s linear;
}

/* ============================================================
   READING TIME / META INFO
   ============================================================ */
.reading-time {
  font-size: 0.78rem; color: var(--muted);
  display: flex; align-items: center; gap: 4px;
}

/* ============================================================
   LEGACY BLOG POST COMPONENTS (older post structure)
   ============================================================ */

/* Meta line below post title */
.blog-meta {
  font-size: 0.88rem; color: var(--muted);
  margin-bottom: 1.5rem;
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
}

/* Header banner image */
.banner-image {
  width: 100%; height: 360px; object-fit: cover;
  border-radius: 6px; margin-bottom: 2rem;
  border: 1px solid var(--border);
}
@media (max-width: 600px) { .banner-image { height: 200px; } }

/* Post footer */
.blog-footer {
  margin-top: 3rem; padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  text-align: center; font-size: 0.85rem; color: var(--muted);
}
.blog-footer a { color: var(--blue); }
.blog-footer a:hover { text-decoration: underline; }

/* Flow step (arrow-prefixed step list) */
.flow-step {
  margin: 12px 0; padding-left: 1.5rem; position: relative;
}
.flow-step::before {
  content: "→"; position: absolute; left: 0;
  color: var(--green); font-weight: 700;
}

/* iOS-style toggle switch (theme toggle in older posts) */
.switch {
  position: relative; display: inline-block;
  width: 50px; height: 24px; flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--border2);
  transition: 0.3s; border-radius: 24px;
}
.slider::before {
  position: absolute; content: "";
  height: 16px; width: 16px;
  left: 4px; bottom: 4px;
  background: #fff; transition: 0.3s; border-radius: 50%;
}
input:checked + .slider { background: var(--blue); }
input:checked + .slider::before { transform: translateX(26px); }

/* ============================================================
   DIVIDER
   ============================================================ */
hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* ============================================================
   POST FOOTER
   ============================================================ */
.post-footer {
  margin-top: 4rem; padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
.post-footer a { font-size: 0.85rem; color: var(--muted); transition: color 0.2s; }
.post-footer a:hover { color: var(--white); text-decoration: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .page, .container, .blog-container { padding: 0 1rem 4rem; }
  .post-header { padding: 2.5rem 0 2rem; }
  pre { padding: 1rem; font-size: 0.78rem; }
  .fix-grid { grid-template-columns: 1fr; }
  .network-diagram { padding: 1rem; gap: 0.5rem; }
  .toc { padding: 1rem 1.25rem; }
  table { font-size: 0.82rem; }
  th, td { padding: 0.5rem 0.75rem; }
  nav.blog-nav { padding: 0 1rem; }
}

@media (max-width: 480px) {
  .post-header h1, .blog-title { font-size: 1.4rem; }
  .network-diagram { flex-direction: column; }
  .network-arrow { transform: rotate(90deg); }
}