/* ═══════════════════════════════════════
   FONTS
═══════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,600;0,700;1,400&family=Unbounded:wght@400;700;900&display=swap');

/* ═══════════════════════════════════════
   THEME VARIABLES
═══════════════════════════════════════ */
:root {
  --accent:  #00d4ff;
  --accent2: #7c3aed;
  --accent3: #10b981;
  --warn:    #f59e0b;
  --danger:  #ef4444;

  /* Dark theme (default) */
  --bg:        #0a0e17;
  --bg2:       #111827;
  --bg3:       #1a2235;
  --border:    #1e2d45;
  --border2:   #263347;
  --text:      #e2e8f0;
  --text2:     #94a3b8;
  --text3:     #64748b;
  --grid-line: rgba(0,212,255,0.03);
  --glow:      rgba(0,212,255,0.08);
  --tag-bg:    rgba(0,212,255,0.08);
  --tag-color: #67e8f9;
  --shadow:    0 4px 24px rgba(0,0,0,0.5);
  --nav-blur:  rgba(10,14,23,0.85);
}

[data-theme="light"] {
  --bg:        #f5f7fa;
  --bg2:       #ffffff;
  --bg3:       #eef2f8;
  --border:    #d1dbe8;
  --border2:   #c2cfe0;
  --text:      #1a2235;
  --text2:     #475569;
  --text3:     #94a3b8;
  --grid-line: rgba(0,150,180,0.04);
  --glow:      rgba(0,150,180,0.06);
  --tag-bg:    rgba(0,150,180,0.08);
  --tag-color: #0369a1;
  --shadow:    0 4px 24px rgba(0,0,0,0.10);
  --nav-blur:  rgba(245,247,250,0.90);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

/* Grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.3s;
}

a { color: inherit; }

/* ═══════════════════════════════════════
   NAV
═══════════════════════════════════════ */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-blur);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  transition: background 0.3s, border-color 0.3s;
}

.nav-logo {
  font-family: 'Unbounded', sans-serif;
  font-size: 14px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  margin-right: 32px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
  list-style: none;
}

.nav-links a {
  color: var(--text3);
  text-decoration: none;
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 5px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--glow);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.lang-toggle {
  display: flex;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 5px;
  overflow: hidden;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--text3);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.15s;
  letter-spacing: 0.5px;
}

.lang-btn.active {
  background: var(--accent);
  color: #000;
}

.theme-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  width: 34px;
  height: 34px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.theme-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ═══════════════════════════════════════
   LAYOUT
═══════════════════════════════════════ */
.page {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 32px 80px;
}

/* ═══════════════════════════════════════
   SECTION TITLE DIVIDER
═══════════════════════════════════════ */
.sec-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sec-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ═══════════════════════════════════════
   TAGS
═══════════════════════════════════════ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--tag-bg);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--glow);
}

.tag .count { font-size: 10px; color: var(--text3); }

/* ═══════════════════════════════════════
   PANELS
═══════════════════════════════════════ */
.panel {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: background 0.3s, border-color 0.3s;
  animation: fadeUp 0.4s ease both;
}

.panel-head {
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text2);
}

.panel-more {
  font-size: 11px;
  color: var(--text3);
  text-decoration: none;
  transition: color 0.15s;
}
.panel-more:hover { color: var(--accent); }

.panel-body { padding: 8px 0; }

/* ═══════════════════════════════════════
   POST ITEMS
═══════════════════════════════════════ */
.post-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 18px;
  text-decoration: none;
  transition: background 0.12s;
}

.post-item:hover { background: var(--bg3); }

.post-num {
  font-size: 10px;
  color: var(--text3);
  min-width: 18px;
  padding-top: 1px;
  text-align: right;
}

.post-info { flex: 1; min-width: 0; }

.post-title {
  font-size: 12.5px;
  color: var(--text);
  line-height: 1.4;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.15s;
}

.post-item:hover .post-title { color: var(--accent); }

.post-date {
  font-size: 10px;
  color: var(--text3);
  margin-top: 2px;
  display: block;
}

.post-lang-badge {
  font-size: 9px;
  background: rgba(245,158,11,0.15);
  color: var(--warn);
  border: 1px solid rgba(245,158,11,0.25);
  padding: 1px 5px;
  border-radius: 3px;
  white-space: nowrap;
  margin-top: 3px;
  display: inline-block;
}

/* ═══════════════════════════════════════
   CERT CARDS
═══════════════════════════════════════ */
.cert-grid {
  padding: 14px 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.cert-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 12px 14px;
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
  cursor: pointer;
  display: block;
}

.cert-card:hover {
  border-color: var(--cert-color, var(--accent));
  transform: translateY(-1px);
}

.cert-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.cert-badge {
  width: 28px;
  height: 28px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  background: color-mix(in srgb, var(--cert-color, var(--accent)) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--cert-color, var(--accent)) 30%, transparent);
  flex-shrink: 0;
}

.cert-name {
  font-family: 'Unbounded', sans-serif;
  font-size: 11px;
  color: var(--cert-color, var(--accent));
  font-weight: 700;
}

.cert-sub {
  font-size: 10.5px;
  color: var(--text3);
  margin-bottom: 8px;
  line-height: 1.4;
}

.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg,
    var(--cert-color, var(--accent)),
    color-mix(in srgb, var(--cert-color, var(--accent)) 60%, white));
  transition: width 0.6s ease;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
}

.progress-label span { font-size: 10px; color: var(--text3); }
.progress-label .pct { color: var(--cert-color, var(--accent)); }

/* ═══════════════════════════════════════
   KB ITEMS
═══════════════════════════════════════ */
.kb-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px;
  text-decoration: none;
  transition: background 0.12s;
}

.kb-item:hover { background: var(--bg3); }

.kb-icon {
  width: 26px;
  height: 26px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  background: var(--bg3);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.kb-title {
  font-size: 12px;
  color: var(--text);
  transition: color 0.15s;
}

.kb-item:hover .kb-title { color: var(--accent3); }
.kb-meta { font-size: 10px; color: var(--text3); }

/* ═══════════════════════════════════════
   ABOUT STRIP
═══════════════════════════════════════ */
.about-strip {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 28px;
  text-decoration: none;
  transition: border-color 0.2s;
  flex-wrap: wrap;
}

.about-strip:hover { border-color: var(--accent2); }

.about-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  border: 2px solid var(--border2);
}

.about-bio { flex: 1; min-width: 200px; }

.about-name {
  font-family: 'Unbounded', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}

.about-desc { font-size: 11.5px; color: var(--text2); line-height: 1.6; }

.about-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex: 1;
  min-width: 200px;
}

.skill-tag {
  font-size: 10.5px;
  padding: 3px 9px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text2);
  background: var(--bg3);
  white-space: nowrap;
}

.about-links { display: flex; gap: 8px; flex-shrink: 0; }

.about-link {
  width: 36px;
  height: 36px;
  border-radius: 7px;
  background: var(--bg3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.15s;
  color: var(--text2);
}

.about-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--glow);
}

/* ═══════════════════════════════════════
   TRANSLATE BANNER
═══════════════════════════════════════ */
.translate-banner {
  background: var(--bg2);
  border: 1px solid rgba(245,158,11,0.3);
  border-radius: 8px;
  padding: 12px 16px;
  display: none;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-size: 12px;
  color: var(--text2);
}

.translate-banner.visible { display: flex; }

.translate-btn {
  margin-left: auto;
  background: rgba(245,158,11,0.15);
  border: 1px solid rgba(245,158,11,0.3);
  color: var(--warn);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  padding: 5px 12px;
  border-radius: 5px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}

.translate-btn:hover { background: rgba(245,158,11,0.25); }
.translate-btn.loading { opacity: 0.6; cursor: not-allowed; }

.translate-result {
  display: none;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  font-size: 12.5px;
  color: var(--text2);
  line-height: 1.8;
  margin-top: 12px;
}

.translate-result.visible { display: block; }

.translate-result .ai-note {
  font-size: 10px;
  color: var(--text3);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

/* ═══════════════════════════════════════
   SEARCH
═══════════════════════════════════════ */
.search-wrap { position: relative; }

.search-input {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  padding: 14px 48px 14px 16px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input::placeholder { color: var(--text3); }

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--glow);
}

.search-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text3);
  font-size: 15px;
  pointer-events: none;
}

/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text3);
  flex-wrap: wrap;
  gap: 8px;
}

.footer-logo {
  font-family: 'Unbounded', sans-serif;
  font-size: 11px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══════════════════════════════════════
   ANIMATIONS
═══════════════════════════════════════ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 860px) {
  .main-grid { grid-template-columns: 1fr 1fr !important; }
  .certs-section { grid-column: span 2 !important; }
}

@media (max-width: 560px) {
  .main-grid { grid-template-columns: 1fr !important; }
  .certs-section { grid-column: span 1 !important; }
  .hero-top { flex-direction: column; }
  .tag-cloud { max-width: 100%; }
  .cert-grid { grid-template-columns: 1fr; }
}

/* ── SPACING FIXES ── */
.hero {  margin-bottom: 56px;}
.hero-top {  margin-bottom: 16px;}
.tag-cloud {  margin-top: 8px;}
.sec-title {  margin-top: 40px;}
.search-wrap {  margin-bottom: 40px;}