/* ════════════════════════════════════════════
   DragonKael Research Lab — style.css
   Dark / Cyberpunk Lab aesthetic
   ════════════════════════════════════════════ */

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

/* ── VARIABLES ── */
:root {
  --bg:        #050810;
  --bg2:       #0a0f1e;
  --bg3:       #0f1530;
  --surface:   #111827;
  --border:    #1e2d4a;
  --border2:   #253560;
  --cyan:      #00e5ff;
  --cyan2:     #00b4d8;
  --green:     #39ff14;
  --green2:    #0dbc79;
  --amber:     #ffb700;
  --red:       #ff3860;
  --purple:    #b57bee;
  --text:      #c8d6f0;
  --text2:     #7a90b8;
  --text3:     #4a5a7a;
  --mono:      'Share Tech Mono', monospace;
  --heading:   'Rajdhani', sans-serif;
  --code:      'Space Mono', monospace;
  --radius:    6px;
  --transition: 0.18s ease;
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img  { display: block; max-width: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--heading);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── SCANLINES ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 2px,
    rgba(0,229,255,0.012) 2px, rgba(0,229,255,0.012) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ── GRID BACKGROUND ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar       { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── LINKS ── */
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── HEADER ── */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(5,8,16,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0 2rem;
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 64px;
}

.logo { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon {
  width: 36px; height: 36px;
  border: 1.5px solid var(--cyan);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 18px; color: var(--cyan);
  box-shadow: 0 0 12px rgba(0,229,255,0.3), inset 0 0 8px rgba(0,229,255,0.05);
  animation: pulse-border 3s ease-in-out infinite;
}
@keyframes pulse-border {
  0%,100% { box-shadow: 0 0 12px rgba(0,229,255,0.3), inset 0 0 8px rgba(0,229,255,0.05); }
  50%      { box-shadow: 0 0 24px rgba(0,229,255,0.6), inset 0 0 16px rgba(0,229,255,0.1); }
}
.logo-text { font-family: var(--mono); font-size: 14px; color: var(--cyan); letter-spacing: 0.1em; }
.logo-text span { color: var(--text2); }

nav { display: flex; align-items: center; gap: 0.25rem; margin-left: auto; }
nav a {
  font-family: var(--mono); font-size: 12px;
  color: var(--text2); padding: 0.35rem 0.75rem;
  border: 1px solid transparent; border-radius: 3px;
  transition: all var(--transition); letter-spacing: 0.05em;
}
nav a:hover { color: var(--cyan); border-color: var(--border2); background: rgba(0,229,255,0.05); text-decoration: none; }

/* ── HERO ── */
.hero {
  position: relative; z-index: 10;
  padding: 4rem 2rem 3rem;
  max-width: 1400px; margin: 0 auto;
}
.hero-tag {
  font-family: var(--mono); font-size: 11px; color: var(--green);
  letter-spacing: 0.2em; text-transform: uppercase;
  margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem;
}
.hero-tag::before {
  content: ''; display: inline-block;
  width: 20px; height: 1px; background: var(--green);
}
h1 {
  font-family: var(--heading);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 700; line-height: 1.05;
  letter-spacing: -0.02em; color: #fff; margin-bottom: 1rem;
}
h1 em { font-style: normal; color: var(--cyan); text-shadow: 0 0 30px rgba(0,229,255,0.4); }
.hero-sub { font-family: var(--mono); font-size: 13px; color: var(--text2); max-width: 600px; line-height: 1.8; }

/* ── STATS ── */
.stats-bar {
  position: relative; z-index: 10;
  max-width: 1400px; margin: 0 auto;
  padding: 0 2rem 2.5rem;
  display: flex; gap: 2rem; flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-val  { font-family: var(--mono); font-size: 24px; color: var(--cyan); font-weight: bold; }
.stat-label{ font-family: var(--mono); font-size: 10px; color: var(--text3); letter-spacing: 0.15em; text-transform: uppercase; }

/* ── TOOLBAR ── */
.toolbar {
  position: relative; z-index: 10;
  max-width: 1400px; margin: 0 auto;
  padding: 0 2rem 2rem;
  display: flex; gap: 1rem; align-items: center; flex-wrap: wrap;
}
.search-wrap { position: relative; flex: 1; min-width: 200px; max-width: 400px; }
.search-icon { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); font-family: var(--mono); font-size: 14px; color: var(--text3); }
#search {
  width: 100%; background: var(--surface);
  border: 1px solid var(--border); border-radius: 4px;
  color: var(--text); font-family: var(--mono); font-size: 13px;
  padding: 0.6rem 0.75rem 0.6rem 2.25rem;
  outline: none; transition: border-color var(--transition), box-shadow var(--transition);
}
#search:focus { border-color: var(--cyan2); box-shadow: 0 0 0 2px rgba(0,229,255,0.1); }
#search::placeholder { color: var(--text3); }

.filters { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.filter-btn {
  font-family: var(--mono); font-size: 11px;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border); border-radius: 3px;
  background: transparent; color: var(--text2);
  cursor: pointer; letter-spacing: 0.05em;
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(0,229,255,0.05); }
.filter-btn.active { border-color: var(--cyan); color: var(--bg); background: var(--cyan); }

/* ── MAIN ── */
main {
  position: relative; z-index: 10;
  max-width: 1400px; margin: 0 auto;
  padding: 0 2rem 4rem;
}

/* ── QUICK LINKS ── */
.quick-links { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 3rem; }
.quick-link {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 12px; color: var(--text2);
  text-decoration: none; padding: 0.5rem 1rem;
  border: 1px solid var(--border); border-radius: 4px;
  background: var(--surface); transition: all var(--transition);
}
.quick-link:hover { color: var(--cyan); border-color: var(--cyan); background: rgba(0,229,255,0.05); box-shadow: 0 0 12px rgba(0,229,255,0.1); text-decoration: none; }
.quick-link-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); box-shadow: 0 0 6px var(--green); }

/* ── SECTION ── */
.section { margin-bottom: 3.5rem; }
.section-head {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 1.25rem; padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.section-icon { font-size: 18px; }
.section-title { font-family: var(--heading); font-size: 1.15rem; font-weight: 600; color: #fff; letter-spacing: 0.05em; text-transform: uppercase; }
.section-count { font-family: var(--mono); font-size: 11px; color: var(--text3); margin-left: auto; }

/* ── CARDS ── */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--card-accent, var(--cyan));
  transition: height 0.2s;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--border2);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4), 0 0 0 1px rgba(0,229,255,0.08);
}
.card:hover::before { height: 100%; }
.card:hover .card-title { color: var(--card-accent, var(--cyan)); }

.card-type {
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--card-accent, var(--cyan));
  margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.4rem;
}
.card-type::before {
  content: ''; display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--card-accent, var(--cyan));
  box-shadow: 0 0 6px var(--card-accent, var(--cyan));
}
.card-title  { font-family: var(--heading); font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 0.5rem; line-height: 1.3; transition: color var(--transition); }
.card-desc   { font-family: var(--mono); font-size: 11px; color: var(--text2); line-height: 1.6; margin-bottom: 0.75rem; }
.card-footer { display: flex; align-items: center; justify-content: space-between; }
.card-ext    { font-family: var(--mono); font-size: 10px; color: var(--text3); background: var(--bg3); border: 1px solid var(--border); padding: 2px 8px; border-radius: 2px; }
.card-arrow  { font-size: 14px; color: var(--text3); transition: color var(--transition), transform var(--transition); }
.card:hover .card-arrow { color: var(--card-accent, var(--cyan)); transform: translateX(3px); }
.card.featured { border-color: rgba(255,183,0,0.3); background: linear-gradient(135deg, var(--surface) 80%, rgba(255,183,0,0.04)); }
.card.featured::before { background: var(--amber); }

/* ── SECTION ACCENT COLORS ── */
.sec-research     { --card-accent: #00e5ff; }
.sec-projects     { --card-accent: #39ff14; }
.sec-experiments  { --card-accent: #ffb700; }
.sec-notes        { --card-accent: #b57bee; }
.sec-papers       { --card-accent: #ff6b6b; }
.sec-infographics { --card-accent: #00d4aa; }

/* ── SKELETON ── */
.skeleton { background: linear-gradient(90deg, var(--surface) 25%, var(--bg3) 50%, var(--surface) 75%); background-size: 200% 100%; animation: shimmer 1.5s infinite; border-radius: 4px; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
.skeleton-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; display: flex; flex-direction: column; gap: 0.5rem; }
.sk-line  { height: 10px; }
.sk-title { height: 16px; width: 70%; margin: 4px 0; }
.sk-desc1 { width: 90%; }
.sk-desc2 { width: 65%; }

/* ── EMPTY / ERROR ── */
.empty { font-family: var(--mono); font-size: 12px; color: var(--text3); padding: 2rem; text-align: center; border: 1px dashed var(--border); border-radius: var(--radius); }
.empty em { display: block; font-size: 28px; font-style: normal; margin-bottom: 0.5rem; }
.error-msg { font-family: var(--mono); font-size: 12px; color: var(--red); padding: 1rem 1.25rem; border: 1px solid rgba(255,56,96,0.3); border-radius: 4px; background: rgba(255,56,96,0.04); }
#no-results { display: none; font-family: var(--mono); font-size: 13px; color: var(--text3); text-align: center; padding: 3rem 2rem; }

/* ── FOOTER ── */
footer {
  position: relative; z-index: 10;
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  max-width: 1400px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem; flex-wrap: wrap;
}
footer p { font-family: var(--mono); font-size: 11px; color: var(--text3); }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  nav { display: none; }
  h1  { font-size: 2rem; }
  .stats-bar { gap: 1.25rem; }
  .cards-grid { grid-template-columns: 1fr; }
}