/* ═══════════════════════════════════════════
   AppSec Journey — Terminal Hacker Aesthetic
   Dark bg · Acid green · Mono type · Sharp
   ═══════════════════════════════════════════ */

:root {
  --bg:        #0a0c0f;
  --bg2:       #0f1318;
  --bg3:       #141920;
  --border:    #1e2730;
  --green:     #00ff88;
  --green-dim: #00cc6a;
  --green-muted: rgba(0,255,136,0.08);
  --amber:     #ffb300;
  --red:       #ff4444;
  --text:      #c8d6e0;
  --text-dim:  #6b7f8c;
  --text-bright: #eaf4ff;
  --font-mono: 'Share Tech Mono', monospace;
  --font-head: 'Syne', 'Be Vietnam Pro', sans-serif;
  --font-body: 'DM Sans', 'Be Vietnam Pro', sans-serif;
}

/* Vietnamese: use Be Vietnam Pro as primary for better diacritics */
:lang(vi) {
  --font-head: 'Be Vietnam Pro', 'Syne', sans-serif;
  --font-body: 'Be Vietnam Pro', 'DM Sans', sans-serif;
}
html:lang(vi) .hero-title,
html:lang(vi) .post-title,
html:lang(vi) .post-card-title,
html:lang(vi) .post-content h1,
html:lang(vi) .post-content h2,
html:lang(vi) .post-content h3,
html:lang(vi) .post-content h4 {
  font-family: 'Be Vietnam Pro', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--green); text-decoration: none; transition: opacity .2s; }
a:hover { opacity: .75; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── HEADER ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,12,15,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.site-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-bright);
  letter-spacing: .02em;
}
.logo-bracket { color: var(--green); }
.site-logo em { color: var(--green); font-style: normal; }

.site-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-dim);
  letter-spacing: .08em;
  text-transform: uppercase;
  transition: color .2s;
}
.site-nav a:hover, .site-nav a.active { color: var(--green); opacity: 1; }
.site-nav .nav-github { 
  border: 1px solid var(--border);
  padding: .3rem .8rem;
  border-radius: 2px;
  color: var(--text);
}
.site-nav .nav-github:hover { border-color: var(--green); color: var(--green); }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--text); transition: .3s; }

/* ── LANGUAGE SWITCHER ── */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: .15rem;
  margin-left: .5rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.lang-current, .lang-link {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  padding: .3rem .6rem;
  transition: all .2s;
}

.lang-current {
  background: var(--green);
  color: var(--bg);
  font-weight: 700;
}

.lang-link {
  color: var(--text-dim);
  text-decoration: none;
}
.lang-link:hover { color: var(--green); background: var(--green-muted); opacity: 1; }

/* ── TRANSLATION LINK ── */
.post-translations {
  margin-top: 1rem;
  display: flex;
  gap: .8rem;
}

.translation-link {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--amber);
  border: 1px solid rgba(255,179,0,.3);
  padding: .3rem .8rem;
  border-radius: 2px;
  transition: all .2s;
}
.translation-link:hover { border-color: var(--amber); background: rgba(255,179,0,.08); opacity: 1; }

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,255,136,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,255,136,.04) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: gridShift 20s linear infinite;
}

@keyframes gridShift {
  0% { background-position: 0 0; }
  100% { background-position: 40px 40px; }
}

.scanline {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,.08) 2px,
    rgba(0,0,0,.08) 4px
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 4rem 2rem;
  max-width: 780px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .15em;
  color: var(--green);
  border: 1px solid rgba(0,255,136,.25);
  padding: .35rem .9rem;
  margin-bottom: 2rem;
  border-radius: 2px;
  animation: fadeUp .6s ease both;
}

.dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%,100% { opacity: 1; }
  50% { opacity: .3; }
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 800;
  line-height: 1.05;
  color: var(--text-bright);
  margin-bottom: 1.5rem;
  animation: fadeUp .6s ease .1s both;
}

.hero-title em {
  color: var(--green);
  font-style: italic;
  display: block;
}

.glitch {
  position: relative;
  display: inline-block;
}
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  opacity: .8;
}
.glitch::before {
  color: var(--red);
  clip-path: polygon(0 30%, 100% 30%, 100% 50%, 0 50%);
  animation: glitch1 4s infinite;
}
.glitch::after {
  color: #00cfff;
  clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%);
  animation: glitch2 4s infinite .5s;
}

@keyframes glitch1 {
  0%,90%,100% { transform: translateX(0); opacity: 0; }
  92% { transform: translateX(-3px); opacity: .6; }
  94% { transform: translateX(3px); opacity: .6; }
}
@keyframes glitch2 {
  0%,90%,100% { transform: translateX(0); opacity: 0; }
  92% { transform: translateX(3px); opacity: .6; }
  94% { transform: translateX(-3px); opacity: .6; }
}

.hero-sub {
  font-family: var(--font-mono);
  color: var(--green-dim);
  font-size: 1rem;
  margin-bottom: 1.2rem;
  animation: fadeUp .6s ease .2s both;
}

.hero-desc {
  color: var(--text);
  font-size: 1.05rem;
  max-width: 560px;
  margin-bottom: 2rem;
  animation: fadeUp .6s ease .3s both;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  animation: fadeUp .6s ease .4s both;
}

.tag {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: .3rem .8rem;
  border-radius: 2px;
  transition: .2s;
}
.tag:hover { border-color: var(--green); color: var(--green); }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── POSTS SECTION ── */
.posts-section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-bright);
  white-space: nowrap;
}

.section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border) 0%, transparent 100%);
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.no-posts {
  grid-column: 1/-1;
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-size: .9rem;
  padding: 3rem;
  border: 1px dashed var(--border);
  text-align: center;
}

.post-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color .2s, transform .2s;
  position: relative;
  overflow: hidden;
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--green);
  transition: height .3s;
}
.post-card:hover { border-color: rgba(0,255,136,.25); transform: translateY(-2px); }
.post-card:hover::before { height: 100%; }

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: .72rem;
}

.post-category {
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: .08em;
}

time { color: var(--text-dim); }

.post-card-title {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
}
.post-card-title a { color: var(--text-bright); }
.post-card-title a:hover { color: var(--green); opacity: 1; }

.post-card-summary {
  color: var(--text-dim);
  font-size: .9rem;
  flex: 1;
  line-height: 1.6;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.post-tags { display: flex; gap: .4rem; flex-wrap: wrap; }
.post-tag {
  font-family: var(--font-mono);
  font-size: .65rem;
  color: var(--text-dim);
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: .15rem .5rem;
  border-radius: 2px;
}

.read-more {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--green-dim);
  white-space: nowrap;
}

/* ── ROADMAP SECTION ── */
.roadmap-section {
  padding: 6rem 0;
  border-top: 1px solid var(--border);
}

.phases {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.phase {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  opacity: .45;
  transition: opacity .2s;
}
.phase:hover { opacity: .75; }
.phase.active { opacity: 1; }

.phase-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--border);
  min-width: 60px;
  transition: color .2s;
}
.phase.active .phase-num { color: var(--green); }

.phase-info { flex: 1; }
.phase-info h4 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: .25rem;
}
.phase-info p {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--text-dim);
}

.phase-status {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .3rem .8rem;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 2px;
}
.phase.active .phase-status {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-muted);
}

/* ── SINGLE POST ── */
.post-header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 4rem 0 3rem;
}

.post-header-meta {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: .78rem;
  margin-bottom: 1.2rem;
  color: var(--text-dim);
}

.read-time { color: var(--amber); }

.post-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--text-bright);
  line-height: 1.2;
  margin-bottom: 1rem;
  max-width: 800px;
}

.post-desc {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
  max-width: 680px;
}

.post-tags-full { display: flex; gap: .5rem; flex-wrap: wrap; }

.post-body {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 4rem;
  padding-top: 4rem;
  padding-bottom: 6rem;
  align-items: start;
}

.post-content {
  min-width: 0;
  font-size: 1.05rem;
  line-height: 1.85;
}

/* Markdown content styles */
.post-content h1,.post-content h2,.post-content h3,.post-content h4 {
  font-family: var(--font-head);
  color: var(--text-bright);
  margin: 2.5rem 0 1rem;
  line-height: 1.35;
}
.post-content h2 { font-size: 1.7rem; border-bottom: 1px solid var(--border); padding-bottom: .5rem; }
.post-content h3 { font-size: 1.3rem; color: var(--green-dim); }

.post-content p { margin-bottom: 1.4rem; }
.post-content a { color: var(--green); text-decoration: underline; text-decoration-color: rgba(0,255,136,.3); }

.post-content ul, .post-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}
.post-content li { margin-bottom: .5rem; }

.post-content blockquote {
  border-left: 3px solid var(--green);
  padding: 1rem 1.5rem;
  background: var(--bg2);
  margin: 2rem 0;
  color: var(--text-dim);
  font-style: italic;
}

.post-content pre {
  background: #060809;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow-x: auto;
  margin: 2rem 0;
  position: relative;
}

.post-content code {
  font-family: var(--font-mono);
  font-size: .88rem;
  background: var(--bg3);
  padding: .15rem .4rem;
  border-radius: 3px;
  color: var(--green);
}

.post-content pre code {
  background: none;
  padding: 1.5rem;
  display: block;
  color: #abb2bf;
  line-height: 1.6;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: .9rem;
}
.post-content th {
  background: var(--bg3);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: .75rem 1rem;
  border: 1px solid var(--border);
  text-align: left;
}
.post-content td {
  padding: .7rem 1rem;
  border: 1px solid var(--border);
  color: var(--text);
}
.post-content tr:nth-child(even) td { background: var(--bg2); }

.post-content img {
  max-width: 100%;
  border: 1px solid var(--border);
  margin: 2rem 0;
  display: block;
}

/* TOC */
.post-toc { font-size: .85rem; }
.toc-sticky {
  position: sticky;
  top: 80px;
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 1.2rem;
}
.toc-sticky h4 {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 1rem;
}
.toc-sticky nav ul { list-style: none; margin: 0; padding: 0; }
.toc-sticky nav li { margin-bottom: .4rem; }
.toc-sticky nav a {
  color: var(--text-dim);
  font-size: .82rem;
  font-family: var(--font-mono);
  transition: color .2s;
  display: block;
  padding: .15rem 0;
}
.toc-sticky nav a:hover { color: var(--green); opacity: 1; }

.toc-nav {
  margin-top: 1.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.toc-prev, .toc-next {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--text-dim);
}

/* ── LIST PAGE ── */
.list-page { padding: 4rem 0; }
.list-header {
  margin-bottom: 3rem;
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
}
.list-header h1 {
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-bright);
}
.list-header p {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--text-dim);
}

/* ── FOOTER ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  background: var(--bg);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-left .logo-text {
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--text-bright);
}
.footer-left p {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--text-dim);
  margin-top: .3rem;
}
.footer-right { text-align: right; font-size: .8rem; color: var(--text-dim); }
.footer-right a { color: var(--text-dim); }
.footer-right a:hover { color: var(--green); opacity: 1; }
.footer-copy { font-family: var(--font-mono); font-size: .7rem; margin-top: .3rem; }

/* ── SEARCH ── */
.search-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  padding: .35rem .5rem;
  border-radius: 2px;
  display: flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  transition: all .2s;
}
.search-toggle:hover {
  border-color: var(--green);
  color: var(--green);
}
.search-toggle .search-label { display: none; }

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(10, 12, 15, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s, visibility .2s;
}
.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-modal {
  width: 90%;
  max-width: 620px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0, 255, 136, 0.05),
    0 20px 60px rgba(0, 0, 0, 0.5);
  transform: translateY(-10px) scale(0.98);
  transition: transform .2s ease;
}
.search-overlay.active .search-modal {
  transform: translateY(0) scale(1);
}

.search-input-wrap {
  display: flex;
  align-items: center;
  gap: .8rem;
  padding: .8rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

.search-icon { color: var(--green); flex-shrink: 0; }

.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-size: .95rem;
  caret-color: var(--green);
}
.search-input::placeholder { color: var(--text-dim); }

.search-kbd {
  font-family: var(--font-mono);
  font-size: .6rem;
  color: var(--text-dim);
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: .15rem .4rem;
  border-radius: 2px;
  letter-spacing: .05em;
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.search-empty,
.search-no-results {
  padding: 2rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--text-dim);
}

.search-result {
  display: block;
  padding: .8rem 1.2rem;
  border-bottom: 1px solid rgba(30, 39, 48, 0.5);
  text-decoration: none;
  transition: background .15s;
  cursor: pointer;
  border-left: 2px solid transparent;
}
.search-result:hover,
.search-result.active {
  background: var(--bg3);
  opacity: 1;
}
.search-result.active {
  border-left-color: var(--green);
}

.search-result-title {
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: .25rem;
}
.search-result:hover .search-result-title,
.search-result.active .search-result-title {
  color: var(--green);
}

.search-result-desc {
  font-size: .8rem;
  color: var(--text-dim);
  line-height: 1.4;
  margin-bottom: .3rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-meta {
  display: flex;
  gap: .5rem;
  align-items: center;
}

.search-result-tag {
  font-family: var(--font-mono);
  font-size: .6rem;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: .1rem .4rem;
  border-radius: 2px;
}

.search-result-date {
  font-family: var(--font-mono);
  font-size: .6rem;
  color: var(--text-dim);
}

.search-result mark {
  background: none;
  color: var(--green);
  font-weight: 600;
}

.search-footer {
  padding: .6rem 1.2rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.search-hint {
  font-family: var(--font-mono);
  font-size: .65rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: .5rem;
}

.search-hint kbd {
  font-family: var(--font-mono);
  font-size: .6rem;
  color: var(--text-dim);
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: .1rem .35rem;
  border-radius: 2px;
  min-width: 1.2em;
  text-align: center;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .site-nav { display: none; position: fixed; top: 60px; left: 0; right: 0; background: var(--bg); flex-direction: column; padding: 2rem; gap: 1.5rem; border-top: 1px solid var(--border); z-index: 99; }
  .site-nav.open { display: flex; }
  .menu-toggle { display: flex; }

  .lang-switcher { margin-left: 0; align-self: flex-start; }

  .hero-content { padding: 2rem 1.5rem; }

  .post-body { grid-template-columns: 1fr; }
  .post-toc { display: none; }

  .posts-grid { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-right { text-align: center; }

  .phase { flex-wrap: wrap; }

  .search-toggle {
    align-self: stretch;
    border: none;
    padding: 0;
    font-family: var(--font-mono);
    font-size: .85rem;
    color: var(--text-dim);
    gap: .6rem;
    justify-content: flex-start;
  }
  .search-toggle:hover { border-color: transparent; }
  .search-toggle .search-label { display: inline; }
  .search-overlay { padding-top: 5vh; }
  .search-modal { width: 95%; }
  .search-footer { display: none; }
}