/* ═══════════════════════════════════════════════════════════════════
   StegVision Design System
   Aesthetic: Classified Intelligence / Forensic Laboratory
   Fonts: Bebas Neue (display) + DM Mono (code) + DM Sans (body)
   Palette: Deep navy-black base, electric chartreuse accent, slate greys
   ═══════════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Mono:wght@300;400;500&family=DM+Sans:wght@300;400;500;600&display=swap');

:root {
  /* Surfaces */
  --ink:   #05080f;
  --ink1:  #090d18;
  --ink2:  #0d1220;
  --ink3:  #111828;
  --ink4:  #162033;
  --glass: rgba(13,18,32,0.85);

  /* Borders */
  --line:  #1a2540;
  --line2: #212e4a;
  --line3: #2b3d60;

  /* Accent - electric chartreuse */
  --a:     #b5ff47;
  --a2:    #99e830;
  --a3:    #6db31e;

  /* Secondary accents */
  --cyan:  #3de8e8;
  --red:   #ff4757;
  --amber: #ffc600;
  --plum:  #b48ef0;

  /* Text */
  --t0:    #f0f4ff;
  --t1:    #c8d4f0;
  --t2:    #7a90c0;
  --t3:    #3a4f78;

  /* Typography */
  --display: 'Bebas Neue', sans-serif;
  --mono:    'DM Mono', monospace;
  --body:    'DM Sans', sans-serif;

  /* Radii */
  --r3:3px; --r6:6px; --r10:10px; --r16:16px; --r24:24px;

  /* Layout */
  --max:1260px;
  --nav-h:58px;
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  background:var(--ink);
  color:var(--t1);
  font-family:var(--body);
  font-size:16px;
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a { color:inherit; text-decoration:none; }
img { display:block; max-width:100%; }
button { cursor:pointer; font-family:inherit; }

/* ── Noise grain overlay ── */
body::after {
  content:''; position:fixed; inset:0; z-index:9999; pointer-events:none;
  opacity:.028;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:256px 256px;
}

/* ── Grid pattern ── */
.grid-bg {
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(181,255,71,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(181,255,71,.04) 1px, transparent 1px);
  background-size:60px 60px;
}

/* ════════════════ NAV ════════════════ */
.nav {
  position:sticky; top:0; z-index:200; height:var(--nav-h);
  background:rgba(5,8,15,.92);
  backdrop-filter:blur(20px) saturate(1.4);
  border-bottom:1px solid var(--line);
}
.nav-inner {
  max-width:var(--max); margin:0 auto; height:100%;
  display:flex; align-items:center;
  justify-content:space-between; padding:0 32px; gap:24px;
}
/* Logo */
.logo { display:flex; align-items:center; gap:10px; }
.logo-mark {
  width:32px; height:32px; position:relative;
  border:1.5px solid var(--a); border-radius:var(--r6);
  display:flex; align-items:center; justify-content:center; overflow:hidden;
}
.logo-mark::before {
  content:''; position:absolute; inset:0;
  background:linear-gradient(135deg, var(--a) 0%, transparent 60%);
  opacity:.15; animation:logo-spin 6s linear infinite;
}
@keyframes logo-spin { to { transform:rotate(360deg); } }
.logo-mark svg { position:relative; z-index:1; }
.logo-name {
  font-family:var(--display); font-size:22px; letter-spacing:.5px;
  color:var(--a); line-height:1;
}
.logo-tag {
  font-family:var(--mono); font-size:9px; letter-spacing:1.5px;
  color:var(--t3); margin-top:1px;
}
/* Nav links */
.nav-links { display:flex; gap:2px; list-style:none; }
.nav-links a {
  font-size:13px; font-weight:500; color:var(--t2);
  padding:6px 14px; border-radius:var(--r6); letter-spacing:.2px;
  transition:color .15s, background .15s;
}
.nav-links a:hover { color:var(--t0); }
.nav-links a.active { color:var(--a); background:rgba(181,255,71,.08); }
/* Nav CTA */
.nav-cta {
  display:inline-flex; align-items:center; gap:6px;
  background:var(--a); color:var(--ink);
  font-family:var(--mono); font-size:11px; font-weight:500;
  letter-spacing:1px; padding:7px 16px; border-radius:var(--r6);
  border:none; transition:background .15s;
}
.nav-cta:hover { background:var(--a2); }
/* Hamburger */
.hamburger { display:none; background:none; border:none; color:var(--t1); padding:4px; }

/* ════════════════ FOOTER ════════════════ */
footer,
.site-footer {
  border-top:1px solid var(--line);
  padding:48px 32px 40px; position:relative; z-index:1;
  background:linear-gradient(180deg, transparent, rgba(9,13,24,.65));
}
.footer-inner {
  max-width:var(--max); margin:0 auto;
  display:grid;
  grid-template-columns:1.15fr 1.35fr 0.75fr 0.55fr;
  gap:28px 32px;
  align-items:start;
}
.footer-col { min-width:0; }
.footer-logo { font-family:var(--display); font-size:22px; color:var(--a); letter-spacing:.3px; }
.footer-tagline { font-size:12px; color:var(--t3); line-height:1.6; margin-top:8px; max-width:240px; }
.footer-team-title {
  font-family:var(--mono); font-size:9px; letter-spacing:1.8px;
  color:var(--a); text-transform:uppercase; margin-bottom:12px;
}
.footer-team-list { list-style:none; display:flex; flex-direction:column; gap:8px; }
.footer-team-list a {
  font-size:13px; color:var(--t1); transition:color .15s;
}
.footer-team-list a:hover { color:var(--a); }
.footer-supervisor { font-size:12px; color:var(--t2); margin-top:14px; line-height:1.6; }
.footer-supervisor strong { color:var(--t0); font-weight:600; }
.footer-links { display:flex; flex-direction:column; gap:8px; list-style:none; }
.footer-links a { font-size:13px; color:var(--t3); transition:color .15s; }
.footer-links a:hover { color:var(--t1); }
.footer-copy { font-family:var(--mono); font-size:10px; color:var(--t3); letter-spacing:.5px; }
.footer-copy-sub { font-size:11px; color:var(--t3); margin-top:6px; }

/* Team section (About page) */
.team-section { padding-top:72px; }
.team-grid {
  display:grid; grid-template-columns:repeat(3, 1fr);
  gap:16px; margin-top:28px;
}
.team-card {
  background:var(--ink2); border:1px solid var(--line);
  border-radius:var(--r16); padding:22px 20px;
  transition:border-color .2s, transform .2s;
}
.team-card:hover { border-color:var(--line3); transform:translateY(-2px); }
.team-card h3 { font-family:var(--display); font-size:22px; color:var(--t0); letter-spacing:.3px; margin-bottom:6px; }
.team-role { font-family:var(--mono); font-size:9px; letter-spacing:1.5px; color:var(--a); margin-bottom:10px; }
.team-card a { font-size:13px; color:var(--cyan); word-break:break-all; }
.team-card a:hover { color:var(--a); }
.supervisor-card {
  margin-top:24px; padding:24px 28px;
  background:linear-gradient(135deg, rgba(181,255,71,.06), rgba(61,232,232,.04));
  border:1px solid rgba(181,255,71,.22); border-radius:var(--r16);
}
.supervisor-card h3 { font-family:var(--display); font-size:28px; color:var(--a); margin-bottom:6px; }
.supervisor-card p { font-size:14px; color:var(--t2); line-height:1.7; }
.engine-cards { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin-top:20px; }
.engine-pill {
  background:var(--ink2); border:1px solid var(--line); border-radius:var(--r10);
  padding:16px;
}
.engine-pill strong { display:block; font-family:var(--mono); font-size:9px; color:var(--a); letter-spacing:1px; margin-bottom:6px; }
.engine-pill span { font-size:12.5px; color:var(--t2); line-height:1.6; }
.lead { font-size:16px; color:var(--t2); line-height:1.75; max-width:720px; }

/* ════════════════ SECTIONS ════════════════ */
.section { padding:96px 32px; position:relative; z-index:1; }
.section-inner { max-width:var(--max); margin:0 auto; }
.section.alt { background:var(--ink1); border-top:1px solid var(--line); }

/* Chip / section label */
.chip {
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:10px; letter-spacing:2px;
  color:var(--a); border:1px solid rgba(181,255,71,.2);
  background:rgba(181,255,71,.05);
  padding:4px 12px; border-radius:100px; margin-bottom:14px;
}
.chip-dot { width:5px; height:5px; border-radius:50%; background:var(--a); }

/* Headings */
h2 {
  font-family:var(--display);
  font-size:clamp(40px, 5vw, 72px);
  color:var(--t0); letter-spacing:.5px;
  line-height:1; margin-bottom:14px;
}
.section-lead {
  font-size:16px; color:var(--t2); max-width:560px;
  line-height:1.75; margin-bottom:52px;
}

/* ════════════════ BUTTONS ════════════════ */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono); font-size:12px; letter-spacing:1px;
  padding:12px 24px; border-radius:var(--r6); border:none;
  cursor:pointer; transition:all .15s; text-decoration:none;
}
.btn-primary { background:var(--a); color:var(--ink); font-weight:500; }
.btn-primary:hover { background:var(--a2); }
.btn-ghost { background:transparent; color:var(--t1); border:1px solid var(--line2); }
.btn-ghost:hover { border-color:var(--t2); color:var(--t0); }
.btn-danger { background:transparent; color:var(--red); border:1px solid rgba(255,71,87,.3); }
.btn-danger:hover { background:rgba(255,71,87,.1); }

/* ════════════════ CARDS ════════════════ */
.card {
  background:var(--ink2); border:1px solid var(--line);
  border-radius:var(--r16); overflow:hidden;
  transition:border-color .2s;
}
.card:hover { border-color:var(--line2); }
.card-head {
  display:flex; align-items:center; gap:10px;
  padding:11px 18px; background:var(--ink3);
  border-bottom:1px solid var(--line);
}
.card-dot { width:6px; height:6px; border-radius:50%; background:var(--a); flex-shrink:0; }
.card-title {
  font-family:var(--mono); font-size:10px; letter-spacing:2px;
  color:var(--a); text-transform:uppercase;
}

/* ════════════════ TABLE ════════════════ */
.table {
  width:100%; border-collapse:collapse;
  background:var(--ink2); border:1px solid var(--line);
  border-radius:var(--r10); overflow:hidden;
}
.table th {
  background:var(--ink3); font-family:var(--mono); font-size:9px;
  letter-spacing:1.5px; color:var(--t2);
  padding:10px 16px; text-align:left; text-transform:uppercase;
  font-weight:400;
}
.table td { padding:12px 16px; border-top:1px solid var(--line); font-size:14px; }
.table tr.hl td { background:rgba(181,255,71,.04); color:var(--a); }
.table td.mono { font-family:var(--mono); font-size:13px; }

/* ════════════════ METRIC CARD ════════════════ */
.metric-card {
  background:var(--ink2); border:1px solid var(--line);
  border-radius:var(--r16); padding:24px; text-align:center;
}
.metric-val {
  font-family:var(--display); font-size:48px; color:var(--a);
  line-height:1; letter-spacing:.5px;
}
.metric-lbl { font-size:13px; color:var(--t2); margin-top:8px; }

/* ════════════════ BADGE ════════════════ */
.badge {
  display:inline-block; font-family:var(--mono); font-size:9px;
  font-weight:500; letter-spacing:1px; padding:3px 8px; border-radius:var(--r3);
}
.badge-ok     { background:rgba(181,255,71,.1); color:var(--a); border:1px solid rgba(181,255,71,.25); }
.badge-warn   { background:rgba(255,198,0,.08); color:var(--amber); border:1px solid rgba(255,198,0,.2); }
.badge-danger { background:rgba(255,71,87,.1); color:var(--red); border:1px solid rgba(255,71,87,.25); }
.badge-info   { background:rgba(61,232,232,.08); color:var(--cyan); border:1px solid rgba(61,232,232,.2); }
.badge-purple { background:rgba(180,142,240,.1); color:var(--plum); border:1px solid rgba(180,142,240,.2); }

/* ════════════════ BAR CHART ════════════════ */
.bar-chart { display:flex; flex-direction:column; gap:12px; }
.bc-row { display:flex; align-items:center; gap:12px; }
.bc-lbl { font-size:13px; color:var(--t1); width:190px; flex-shrink:0; }
.bc-track { flex:1; height:26px; background:var(--ink3); border-radius:3px; overflow:hidden; }
.bc-fill {
  height:100%; border-radius:3px;
  display:flex; align-items:center; justify-content:flex-end; padding-right:10px;
}
.bc-fill.hl { background:rgba(181,255,71,.18); border:1px solid rgba(181,255,71,.3); }
.bc-fill.hl .bc-num { color:var(--a); }
.bc-fill.norm { background:rgba(61,232,232,.1); border:1px solid rgba(61,232,232,.2); }
.bc-fill.norm .bc-num { color:var(--cyan); }
.bc-num { font-family:var(--mono); font-size:12px; font-weight:500; }

/* ════════════════ PROB BAR ════════════════ */
.prob-row { display:flex; align-items:center; gap:10px; margin-bottom:8px; }
.prob-lbl { font-family:var(--mono); font-size:10px; color:var(--t2); width:46px; flex-shrink:0; }
.prob-track { flex:1; height:3px; background:var(--ink4); border-radius:2px; overflow:hidden; }
.prob-fill { height:100%; border-radius:2px; width:0; transition:width .8s cubic-bezier(.22,1,.36,1); }
.prob-fill.clean { background:var(--a); }
.prob-fill.stego { background:var(--red); }
.prob-pct { font-family:var(--mono); font-size:10px; width:32px; text-align:right; color:var(--t2); }

/* ════════════════ CODE BLOCK ════════════════ */
.code {
  background:var(--ink); border:1px solid var(--line);
  border-left:3px solid var(--a); border-radius:var(--r6);
  padding:16px 18px; font-family:var(--mono); font-size:12px;
  line-height:1.8; overflow-x:auto; white-space:pre; margin:12px 0;
}
.cc { color:var(--t3); } .ck { color:var(--cyan); }
.cv { color:var(--t1); } .cs { color:var(--a); }

/* ════════════════ SPINNER ════════════════ */
.spinner {
  width:48px; height:48px; margin:0 auto; position:relative;
}
.spinner::before,.spinner::after { content:''; position:absolute; border-radius:50%; }
.spinner::before { inset:0; border:1px solid var(--line2); }
.spinner::after {
  inset:4px;
  border:1.5px solid transparent;
  border-top-color:var(--a);
  border-right-color:rgba(181,255,71,.4);
  animation:spin .65s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* ════════════════ ALERTS ════════════════ */
.alert {
  border-radius:var(--r6); padding:10px 14px; font-family:var(--mono);
  font-size:11px; line-height:1.6; display:none; margin-top:10px;
}
.alert-error { background:rgba(255,71,87,.07); border:1px solid rgba(255,71,87,.25); color:var(--red); }
.alert-info  { background:rgba(61,232,232,.06); border:1px solid rgba(61,232,232,.2); color:var(--cyan); }
.alert-warn  { background:rgba(255,198,0,.07); border:1px solid rgba(255,198,0,.2); color:var(--amber); }

/* ════════════════ API STATUS BAR ════════════════ */
.api-bar {
  background:var(--ink1); border-bottom:1px solid var(--line);
  padding:6px 32px;
}
.api-bar-inner {
  max-width:var(--max); margin:0 auto;
  display:flex; align-items:center; gap:8px;
}
.api-dot {
  width:6px; height:6px; border-radius:50%;
  background:var(--t3); flex-shrink:0;
  transition:background .3s;
}
.api-dot.online { background:var(--a); animation:pulse-dot 2s ease-in-out infinite; }
.api-dot.offline { background:var(--red); }
@keyframes pulse-dot { 0%,100%{opacity:1} 50%{opacity:.3} }
#api-status-text {
  font-family:var(--mono); font-size:10px; letter-spacing:.5px; color:var(--t3);
}

/* ════════════════ RESPONSIVE ════════════════ */
@media (max-width:900px) {
  .nav-links { display:none; }
  .hamburger { display:block; }
  .nav-links.open {
    display:flex; flex-direction:column;
    position:absolute; top:var(--nav-h); left:0; right:0;
    background:var(--ink1); border-bottom:1px solid var(--line);
    padding:12px; gap:2px; z-index:199;
  }
  .section { padding:64px 20px; }
  footer, .site-footer { padding:36px 20px 32px; }
  .footer-inner { grid-template-columns:1fr 1fr; gap:24px; }
  .team-grid, .engine-cards { grid-template-columns:1fr; }
  .api-bar { padding:6px 20px; }
}
@media (max-width:560px) {
  .nav-inner { padding:0 16px; }
  .footer-inner { grid-template-columns:1fr; }
}

/* Final UI polish for the CNN-Transformer multisteganalysis build. */
.nav::after {
  content:'';
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(181,255,71,.7), rgba(61,232,232,.45), transparent);
  opacity:.45;
}
.card,
.metric-card,
.chart-box,
.pipe-box,
.step,
.step-item,
.card-lite,
.panel {
  box-shadow:0 18px 55px rgba(0,0,0,.24), inset 0 1px 0 rgba(255,255,255,.018);
}
.card,
.card-lite,
.metric-card,
.engine-card {
  transition:border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.card:hover,
.card-lite:hover,
.metric-card:hover,
.engine-card:hover {
  border-color:var(--line3);
  transform:translateY(-1px);
  box-shadow:0 22px 70px rgba(0,0,0,.32), 0 0 0 1px rgba(61,232,232,.025);
}
.btn,
.nav-cta,
#scan-btn {
  box-shadow:0 0 0 rgba(181,255,71,0);
}
.btn-primary:hover,
.nav-cta:hover,
#scan-btn:hover {
  box-shadow:0 0 28px rgba(181,255,71,.18);
}
.api-bar {
  border-bottom:1px solid rgba(61,232,232,.08);
}
.engine-panel {
  position:relative;
}
.engine-panel::before {
  content:'EVIDENCE ENGINES';
  position:absolute;
  top:4px;
  right:22px;
  font-family:var(--mono);
  font-size:8px;
  letter-spacing:1.4px;
  color:var(--t3);
}
.engine-card {
  padding-top:14px;
}
.findings-section,
.summary-section {
  background:linear-gradient(180deg, rgba(255,255,255,.01), transparent);
}
@media(max-width:560px) {
  .engine-panel { grid-template-columns:1fr; }
  .engine-panel::before { display:none; }
}
@media(prefers-reduced-motion:reduce) {
  *,
  *::before,
  *::after {
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}