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

:root {
  --bg:       #ffffff;
  --bg2:      #f5f5f7;
  --bg3:      #e8e8ed;
  --border:   #d2d2d7;
  --border2:  #c7c7cc;
  --text:     #1d1d1f;
  --text2:    #6e6e73;
  --text3:    #86868b;
  --black:    #000000;
  --radius:   12px;
  --shadow:   0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, 'SF Pro Display', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ────────────────────────────────────────────────────────────────── */
.nav {
  background: rgba(255,255,255,0.85);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.nav-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 0 28px; height: 52px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  font-size: 15px; font-weight: 600; color: var(--black);
  letter-spacing: -.2px;
  display: flex; align-items: center; gap: 10px;
}
.nav-links { display: flex; align-items: center; gap: 16px; }
.badge {
  font-size: 11px; font-weight: 500; padding: 3px 10px;
  border-radius: 20px; letter-spacing: .2px;
  background: var(--bg3);
  color: var(--text2);
  border: 1px solid var(--border);
}
.badge-green { background: var(--bg3); color: var(--text); border-color: var(--border); }
.badge-amber { background: var(--bg3); color: var(--text2); border-color: var(--border); }
.btn-nav {
  font-size: 13px; font-weight: 500; padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border2);
  color: var(--text2);
  background: transparent;
  cursor: pointer; text-decoration: none;
  transition: color .15s, border-color .15s, background .15s;
}
.btn-nav:hover { color: var(--black); border-color: var(--text3); background: var(--bg2); }

/* ── HERO ───────────────────────────────────────────────────────────────── */
.hero {
  border-bottom: 1px solid var(--border);
  padding: 80px 28px 68px;
  background: var(--bg);
}
.hero-inner { max-width: 680px; margin: 0 auto; text-align: center; }
.hero h1 {
  font-size: 52px; font-weight: 700; line-height: 1.06;
  letter-spacing: -.5px;
  color: var(--black);
  margin-bottom: 18px;
}
.hero-sub {
  font-size: 17px;
  color: var(--text2);
  max-width: 520px;
  margin: 0 auto 44px;
  line-height: 1.65;
  font-weight: 400;
}
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
}
.stat { text-align: center; padding: 0 32px; }
.stat-val {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -.3px;
}
.stat-val small { font-size: 16px; color: var(--text2); font-weight: 400; }
.stat-lbl {
  font-size: 11px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: .8px;
  margin-top: 2px;
}
.stat-div { width: 1px; height: 32px; background: var(--border); }

/* ── CONTAINER & CARD ───────────────────────────────────────────────────── */
.container { max-width: 860px; margin: 0 auto; padding: 40px 20px 80px; }
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card-header { margin-bottom: 20px; }
.card-header h2 {
  font-size: 19px;
  font-weight: 600;
  color: var(--black);
  letter-spacing: -.2px;
  margin-bottom: 4px;
}
.card-sub { font-size: 13px; color: var(--text3); }

/* ── DROP ZONE ──────────────────────────────────────────────────────────── */
.drop-zone {
  border: 1.5px dashed var(--border2);
  border-radius: var(--radius);
  padding: 52px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  margin-bottom: 20px;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--text3);
  background: var(--bg2);
}
.drop-icon { font-size: 32px; margin-bottom: 12px; opacity: .4; }
.drop-main { font-size: 15px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.drop-sub  { font-size: 13px; color: var(--text3); }

/* ── UPLOAD OPTIONS ─────────────────────────────────────────────────────── */
.upload-options { margin-bottom: 18px; }
.opt-label {
  font-size: 13px;
  color: var(--text2);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.select {
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 14px;
  cursor: pointer;
  outline: none;
  font-family: inherit;
  appearance: none;
}
.select:focus { border-color: var(--text3); }

/* ── FILE INFO ──────────────────────────────────────────────────────────── */
.file-info {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--text);
}
.file-icon { font-size: 18px; opacity: .6; }
.file-size { color: var(--text3); font-size: 12px; margin-left: auto; }
.btn-clear {
  background: none; border: none; color: var(--text3);
  cursor: pointer; font-size: 16px; padding: 0 4px;
  transition: color .15s;
}
.btn-clear:hover { color: var(--text2); }

/* ── BUTTONS ────────────────────────────────────────────────────────────── */
.btn-primary {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  font-weight: 600;
  background: var(--black);
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: opacity .15s;
  letter-spacing: -.1px;
  font-family: inherit;
}
.btn-primary:hover:not(:disabled) { opacity: .82; }
.btn-primary:disabled { opacity: .22; cursor: not-allowed; }

.btn-secondary {
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
  border-radius: 8px;
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
  font-family: inherit;
}
.btn-secondary:hover { border-color: var(--border2); color: var(--text); background: var(--bg2); }

/* ── PROGRESS ───────────────────────────────────────────────────────────── */
.progress-pct {
  font-size: 22px;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -.3px;
}
.progress-track {
  height: 3px;
  background: var(--bg3);
  border-radius: 99px;
  overflow: hidden;
  margin: 16px 0 12px;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--black);
  border-radius: 99px;
  transition: width .4s ease;
}
.progress-msg { font-size: 13px; color: var(--text3); margin-bottom: 22px; }
.pipeline-steps { display: flex; gap: 8px; flex-wrap: wrap; }
.step {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 12px;
  color: var(--text3);
  transition: all .25s;
}
.step.active {
  border-color: var(--text3);
  color: var(--text);
  background: var(--bg2);
}
.step.done {
  border-color: var(--border);
  color: var(--text2);
  background: var(--bg3);
}
.step-ico { font-size: 13px; }

/* ── SUMMARY CARDS ──────────────────────────────────────────────────────── */
.summary-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
.sum-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 16px;
  text-align: center;
}
.sum-val {
  font-size: 32px;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -.5px;
  margin-bottom: 6px;
}
.sum-lbl {
  font-size: 11px;
  font-weight: 500;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: .6px;
}
.sum-card-blue, .sum-card-red, .sum-card-amber, .sum-card-green {
  background: var(--bg2);
  border-color: var(--border);
  color: var(--black);
}

/* ── CHART ──────────────────────────────────────────────────────────────── */
.chart-wrap { position: relative; height: 220px; }

/* ── GALLERY ────────────────────────────────────────────────────────────── */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 10px;
}
.gallery-item {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  position: relative;
  transition: box-shadow .2s, transform .2s;
}
.gallery-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.gallery-item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; }
.gallery-meta {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,.75));
  padding: 20px 10px 8px;
  font-size: 10px;
  color: rgba(255,255,255,0.8);
  font-weight: 500;
}
.gallery-score { color: #fff; font-size: 11px; font-weight: 600; margin-top: 2px; }
.empty-gallery { text-align: center; padding: 40px 20px; color: var(--text3); }
.empty-ico { font-size: 32px; display: block; margin-bottom: 10px; opacity: .4; }

/* ── LOG TABLE ──────────────────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  max-height: 340px;
  overflow-y: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}
.log-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.log-table th {
  background: var(--bg2);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text3);
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border);
}
.log-table td { padding: 9px 14px; border-bottom: 1px solid var(--border); color: var(--text2); }
.log-table tr:last-child td { border-bottom: none; }
.log-table tr.anomaly-row { background: var(--bg2); }
.log-table tr.anomaly-row td:last-child { color: var(--black); font-weight: 600; }
.log-table tr.normal-row td:last-child  { color: var(--text3); }

/* ── LIGHTBOX ───────────────────────────────────────────────────────────── */
.lightbox {
  position: fixed; inset: 0; z-index: 999;
  display: flex; align-items: center; justify-content: center;
}
.lightbox-bg {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.lightbox-inner {
  position: relative; z-index: 1;
  max-width: 80vw; max-height: 85vh;
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}
.lightbox-inner img {
  max-width: 100%; max-height: 70vh;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.15);
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.lightbox-meta {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  text-align: center;
  line-height: 1.7;
}
.lightbox-close {
  position: absolute; top: -12px; right: -12px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text2);
  border-radius: 50%;
  width: 32px; height: 32px;
  cursor: pointer;
  font-size: 14px;
  display: flex; align-items: center; justify-content: center;
  transition: background .15s, color .15s;
}
.lightbox-close:hover { background: var(--bg2); color: var(--black); }

/* ── DEMO SECTION ───────────────────────────────────────────────────────── */
.demo-section {
  border-bottom: 1px solid var(--border);
  padding: 56px 0 64px;
  background: var(--bg2);
}
.demo-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}
.demo-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -.3px;
  margin-bottom: 8px;
}
.demo-sub {
  font-size: 14px;
  color: var(--text2);
  max-width: 500px;
  line-height: 1.6;
}
.btn-demo {
  flex-shrink: 0;
  padding: 11px 24px;
  font-size: 14px;
  font-weight: 600;
  background: var(--black);
  color: #fff;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  transition: opacity .15s;
  font-family: inherit;
  white-space: nowrap;
}
.btn-demo:hover { opacity: .82; }
.btn-demo:disabled { opacity: .3; cursor: default; }

.demo-video-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 24px;
  background: #000;
  box-shadow: var(--shadow);
}
.demo-video-wrap video {
  width: 100%;
  display: block;
  max-height: 380px;
  object-fit: contain;
}
.demo-video-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 14px;
  font-size: 11px;
  color: rgba(255,255,255,.55);
  background: linear-gradient(transparent, rgba(0,0,0,.6));
  letter-spacing: .3px;
}
.demo-results-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.demo-results-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--black);
}
.demo-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--bg3);
  color: var(--text3);
  border: 1px solid var(--border);
}

/* ── FOOTER ─────────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 24px;
  font-size: 12px;
  color: var(--text3);
  border-top: 1px solid var(--border);
  letter-spacing: .1px;
  background: var(--bg2);
}

/* ── UTILITIES ──────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

@media (max-width: 640px) {
  .summary-row { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 34px; }
  .hero-stats { flex-wrap: wrap; justify-content: center; }
  .stat { padding: 0 16px; }
  .container { padding: 24px 16px 60px; }
  .demo-header { flex-direction: column; }
}