/* ── 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(255,255,255,0.92);
  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: 56px;
  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;
  flex-shrink: 0;
}
.nav-links {
  display: flex; align-items: center; gap: 8px;
}
.btn-nav {
  font-size: 13px; font-weight: 500; padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid transparent;
  color: var(--text2);
  background: transparent;
  cursor: pointer; text-decoration: none;
  transition: color .15s, border-color .15s, background .15s;
  white-space: nowrap;
}
.btn-nav:hover { color: var(--black); background: var(--bg2); }
.btn-nav-cta {
  background: var(--black);
  color: #fff;
  border-color: var(--black);
}
.btn-nav-cta:hover { background: #333; border-color: #333; color: #fff; }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 6px;
}
.nav-hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--black); border-radius: 2px;
}
.nav-mobile {
  border-top: 1px solid var(--border);
  padding: 12px 20px 16px;
  display: flex; flex-direction: column; gap: 4px;
}
.nav-mobile-link {
  font-size: 15px; font-weight: 500; color: var(--text);
  text-decoration: none; padding: 10px 4px;
  border-bottom: 1px solid var(--border);
}
.nav-mobile-link:last-child { border-bottom: none; }

/* ── HERO ───────────────────────────────────────────────────────────────── */
.hero {
  border-bottom: 1px solid var(--border);
  padding: 72px 28px 80px;
  background: var(--bg);
}
.hero-inner { max-width: 720px; margin: 0 auto; text-align: center; }
.hero-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 4px;
}
.hero h1 {
  font-size: 56px; font-weight: 700; line-height: 1.05;
  letter-spacing: -.8px;
  color: var(--black);
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 17px;
  color: var(--text2);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.7;
  font-weight: 400;
}
.hero-cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 52px;
}
.btn-hero-primary {
  padding: 14px 28px;
  font-size: 15px; font-weight: 600;
  background: var(--black); color: #fff;
  border: none; border-radius: 24px;
  cursor: pointer; text-decoration: none;
  transition: opacity .15s;
  font-family: inherit;
}
.btn-hero-primary:hover { opacity: .82; }
.btn-hero-secondary {
  padding: 14px 28px;
  font-size: 15px; font-weight: 500;
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border2);
  border-radius: 24px;
  cursor: pointer; text-decoration: none;
  transition: border-color .15s, background .15s;
  font-family: inherit;
}
.btn-hero-secondary:hover { border-color: var(--text2); background: var(--bg2); }
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--border);
  padding-top: 36px;
}
.stat { text-align: center; padding: 0 28px; }
.stat-val {
  display: block;
  font-size: 26px; font-weight: 700;
  color: var(--black); letter-spacing: -.3px;
}
.stat-val small { font-size: 15px; 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: 36px; background: var(--border); flex-shrink: 0; }

/* ── USE CASES ──────────────────────────────────────────────────────────── */
.usecases-section {
  padding: 88px 28px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.usecases-inner { max-width: 1060px; margin: 0 auto; }
.section-label {
  font-size: 11px; font-weight: 600;
  letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--text3); margin-bottom: 12px;
}
.section-title {
  font-size: 36px; font-weight: 700;
  letter-spacing: -.5px; color: var(--black);
  margin-bottom: 12px; text-align: center;
}
.section-sub {
  font-size: 16px; color: var(--text2);
  text-align: center; margin-bottom: 52px;
}
.usecases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.usecase-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  transition: box-shadow .2s, transform .2s;
}
.usecase-card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,.08);
  transform: translateY(-3px);
}
.usecase-icon-wrap {
  width: 48px; height: 48px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.usecase-card h3 {
  font-size: 17px; font-weight: 600;
  color: var(--black); margin-bottom: 10px;
  letter-spacing: -.2px;
}
.usecase-card p {
  font-size: 14px; color: var(--text2);
  line-height: 1.65; margin-bottom: 20px;
}
.usecase-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 11px; font-weight: 500;
  padding: 4px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text2);
}

/* ── HOW IT WORKS ───────────────────────────────────────────────────────── */
.how-section {
  padding: 80px 28px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
}
.how-inner { max-width: 900px; margin: 0 auto; text-align: center; }
.how-inner .section-label { text-align: center; }
.how-inner .section-title { margin-bottom: 48px; }
.how-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}
.how-step {
  flex: 1; min-width: 200px; max-width: 260px;
  padding: 0 20px; text-align: center;
}
.how-num {
  font-size: 36px; font-weight: 700;
  color: var(--bg3); letter-spacing: -.5px;
  margin-bottom: 12px; font-variant-numeric: tabular-nums;
}
.how-step h4 {
  font-size: 16px; font-weight: 600;
  color: var(--black); margin-bottom: 8px;
}
.how-step p { font-size: 13px; color: var(--text2); line-height: 1.6; }
.how-arrow {
  font-size: 24px; color: var(--border2);
  padding: 0 4px; margin-top: 40px;
  flex-shrink: 0;
}

/* ── CONTAINER & CARD ───────────────────────────────────────────────────── */
.container { max-width: 860px; margin: 0 auto; padding: 40px 20px 80px; }
.upload-section-header { text-align: center; }
.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); }

/* ── 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); }

/* ── 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,.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); }

/* ── DEMO SECTION ───────────────────────────────────────────────────────── */
.demo-section {
  border-bottom: 1px solid var(--border);
  padding: 64px 0 72px; 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: 400px; 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);
}

/* ── CONTACT ────────────────────────────────────────────────────────────── */
.contact-section {
  padding: 88px 28px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}
.contact-inner {
  max-width: 1000px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start;
}
.contact-details { margin-top: 32px; display: flex; flex-direction: column; gap: 16px; }
.contact-detail-item { display: flex; flex-direction: column; gap: 2px; }
.contact-detail-label { font-size: 11px; font-weight: 600; letter-spacing: .8px; text-transform: uppercase; color: var(--text3); }
.contact-detail-val { font-size: 15px; color: var(--text); }
.contact-link { color: var(--black); text-decoration: underline; text-underline-offset: 3px; }
.contact-link:hover { opacity: .7; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-label { font-size: 13px; font-weight: 500; color: var(--text2); }
.form-input {
  background: var(--bg2); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px;
  padding: 11px 14px; font-size: 14px;
  outline: none; font-family: inherit;
  transition: border-color .15s;
  width: 100%;
}
.form-input:focus { border-color: var(--black); }
.form-textarea { resize: vertical; min-height: 110px; }
.form-success {
  text-align: center; padding: 14px;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; color: var(--text);
}
.form-error {
  text-align: center; padding: 14px;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; font-size: 13px; color: var(--text2);
}

/* ── 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); }

/* ── FOOTER ─────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg2);
  padding: 36px 28px;
}
.footer-inner {
  max-width: 1060px; margin: 0 auto;
  display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 20px;
}
.footer-brand {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; color: var(--black);
}
.footer-links {
  display: flex; gap: 24px; flex-wrap: wrap;
}
.footer-links a {
  font-size: 13px; color: var(--text2);
  text-decoration: none; transition: color .15s;
}
.footer-links a:hover { color: var(--black); }
.footer-copy { font-size: 12px; color: var(--text3); }

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

/* ── MOBILE ─────────────────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .usecases-grid { grid-template-columns: 1fr; gap: 16px; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-links { gap: 16px; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .hero { padding: 52px 20px 60px; }
  .hero h1 { font-size: 36px; letter-spacing: -.4px; }
  .hero-sub { font-size: 15px; }
  .hero-cta-row { flex-direction: column; align-items: center; }
  .btn-hero-primary, .btn-hero-secondary { width: 100%; max-width: 320px; text-align: center; }
  .hero-stats { gap: 0; border-top: 1px solid var(--border); padding-top: 28px; }
  .stat { padding: 0 12px; }
  .stat-val { font-size: 20px; }

  .usecases-section { padding: 56px 20px; }
  .section-title { font-size: 26px; }
  .how-section { padding: 56px 20px; }
  .how-steps { flex-direction: column; align-items: center; }
  .how-arrow { transform: rotate(90deg); margin: 0; }
  .how-step { min-width: unset; max-width: 100%; }

  .summary-row { grid-template-columns: 1fr 1fr; }
  .container { padding: 24px 16px 60px; }
  .demo-header { flex-direction: column; }
  .demo-section { padding: 44px 0 52px; }

  .contact-section { padding: 56px 20px; }
  .section-title { text-align: left; }
}