/* ── Variables ─────────────────────────────────────────────────── */
:root {
  --bg:          #070d1a;
  --bg2:         #0c1525;
  --bg3:         #111d30;
  --surface:     #131e32;
  --surface2:    #1a2740;
  --border:      rgba(99, 179, 237, 0.12);
  --border-hover:rgba(99, 179, 237, 0.30);

  --blue:        #3b82f6;
  --blue-light:  #60a5fa;
  --cyan:        #06b6d4;
  --cyan-light:  #67e8f9;
  --teal:        #14b8a6;
  --water:       #0ea5e9;

  --text-primary:   #e2eaf7;
  --text-secondary: #7a99c2;
  --text-muted:     #4a6480;

  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'DM Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 12px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
}

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

html { scroll-behavior: smooth; }

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

/* ── Animated Background ───────────────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  animation: orb-float 12s ease-in-out infinite;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(14,165,233,0.12) 0%, transparent 70%);
  top: -200px; left: -100px;
  animation-delay: 0s;
}
.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,0.10) 0%, transparent 70%);
  top: 40%; right: -150px;
  animation-delay: -4s;
}
.orb-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(20,184,166,0.08) 0%, transparent 70%);
  bottom: -100px; left: 30%;
  animation-delay: -8s;
}
@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -40px) scale(1.05); }
  66%       { transform: translate(-20px, 20px) scale(0.97); }
}

/* ── Header ────────────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 22px;
  color: var(--cyan);
  line-height: 1;
  animation: logo-pulse 3s ease-in-out infinite;
}
@keyframes logo-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.7; transform: scale(0.92); }
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* ── Status pills ──────────────────────────────────────────────── */
.service-status {
  display: flex;
  gap: 8px;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  transition: all 0.3s;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background 0.4s, box-shadow 0.4s;
}
.dot.ok {
  background: #34d399;
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.6);
}
.dot.down {
  background: #f87171;
  box-shadow: 0 0 8px rgba(248, 113, 113, 0.6);
}

/* ── Main ──────────────────────────────────────────────────────── */
.main {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px 80px;
}

/* ── Hero ──────────────────────────────────────────────────────── */
.hero {
  padding: 80px 0 56px;
  animation: fade-up 0.8s ease both;
}

.hero-label {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--cyan);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.hero-accent {
  background: linear-gradient(135deg, var(--water) 0%, var(--cyan) 50%, var(--teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* ── Upload section ────────────────────────────────────────────── */
.upload-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
  animation: fade-up 0.8s 0.1s ease both;
}

.upload-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.upload-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59,130,246,0.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
}
.upload-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}
.upload-card:hover::before { opacity: 1; }
.upload-card.has-file {
  border-color: rgba(14, 165, 233, 0.4);
  background: rgba(14, 165, 233, 0.05);
}
.upload-card.optional {
  border-style: dashed;
}

.upload-card-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.upload-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.3s;
}
.upload-card:hover .upload-icon-wrap {
  background: rgba(59,130,246,0.18);
  border-color: rgba(59,130,246,0.4);
}
.upload-card.has-file .upload-icon-wrap {
  background: rgba(14,165,233,0.15);
  border-color: rgba(14,165,233,0.4);
}

.upload-icon {
  width: 24px;
  height: 24px;
  color: var(--blue-light);
}
.upload-card.has-file .upload-icon { color: var(--cyan-light); }

.upload-text { flex: 1; }

.upload-title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.optional-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
}

.upload-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.upload-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 5px 10px;
  border-radius: 6px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all 0.3s;
  flex-shrink: 0;
}
.upload-card.has-file .upload-badge {
  background: rgba(14,165,233,0.15);
  border-color: rgba(14,165,233,0.3);
  color: var(--cyan-light);
}

/* ── Run button ────────────────────────────────────────────────── */
.run-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  animation: fade-up 0.8s 0.2s ease both;
}

.btn-run {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--cyan) 100%);
  border: none;
  border-radius: var(--radius-xl);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  letter-spacing: -0.01em;
}
.btn-run::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--teal) 100%);
  opacity: 0;
  transition: opacity 0.3s;
}
.btn-run:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(59,130,246,0.4);
}
.btn-run:hover::before { opacity: 1; }
.btn-run:active { transform: translateY(-1px); }
.btn-run:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn-label, .btn-arrow { position: relative; z-index: 1; }
.btn-arrow {
  font-size: 20px;
  transition: transform 0.3s;
}
.btn-run:hover .btn-arrow { transform: translateX(4px); }

/* ── Spinner ───────────────────────────────────────────────────── */
.spinner-wrap {
  display: none;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.spinner-ring {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Error banner ──────────────────────────────────────────────── */
.error-banner {
  display: none;
  align-items: center;
  gap: 12px;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.25);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 24px;
  font-size: 14px;
  color: #fca5a5;
  animation: fade-up 0.3s ease;
}

.error-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(248,113,113,0.2);
  border: 1px solid rgba(248,113,113,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  color: #f87171;
}

/* ── Results ───────────────────────────────────────────────────── */
.results { display: none; }

.section-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 8px 0 40px;
}
.divider-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}
.divider-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── Masks grid ────────────────────────────────────────────────── */
.masks-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
  align-items: start;
}

.mask-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.4s;
  animation: fade-up 0.5s ease both;
}
.mask-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.ensemble-card {
  border-color: rgba(14,165,233,0.3);
  background: linear-gradient(180deg, rgba(14,165,233,0.06) 0%, var(--surface) 40%);
  box-shadow: 0 0 0 1px rgba(14,165,233,0.15), var(--shadow-glow);
  position: relative;
}

.ensemble-crown {
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--cyan-light);
  background: rgba(14,165,233,0.1);
  border-bottom: 1px solid rgba(14,165,233,0.15);
  text-align: center;
}

.mask-card-header {
  padding: 16px 16px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.model-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 6px;
  letter-spacing: 0.04em;
}
.unet-tag {
  background: rgba(59,130,246,0.15);
  color: var(--blue-light);
  border: 1px solid rgba(59,130,246,0.25);
}
.deeplab-tag {
  background: rgba(20,184,166,0.15);
  color: #5eead4;
  border: 1px solid rgba(20,184,166,0.25);
}
.ensemble-tag {
  background: rgba(14,165,233,0.15);
  color: var(--cyan-light);
  border: 1px solid rgba(14,165,233,0.3);
}

.model-pct {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.mask-img-wrap {
  position: relative;
  overflow: hidden;
  background: #020812;
  aspect-ratio: 1;
}
.mask-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}
.mask-card:hover .mask-img-wrap img { transform: scale(1.04); }

.mask-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7,13,26,0.8) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s;
  display: flex;
  align-items: flex-end;
  padding: 12px;
}
.mask-card:hover .mask-overlay { opacity: 1; }
.mask-overlay-text {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
}

.mask-card-footer {
  padding: 12px 16px 16px;
}

.water-bar-wrap {
  height: 4px;
  background: var(--surface2);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 6px;
}

.water-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--blue) 0%, var(--cyan) 100%);
  border-radius: 2px;
  width: 0%;
  transition: width 1s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.water-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── Metrics ───────────────────────────────────────────────────── */
.metrics-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: fade-up 0.5s 0.2s ease both;
}

.metrics-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.metrics-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.metrics-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

.metrics-table-wrap { overflow-x: auto; }

.metrics-table {
  width: 100%;
  border-collapse: collapse;
}

.metrics-table th {
  padding: 12px 24px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
}

.metrics-table td {
  padding: 14px 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}
.metrics-table tbody tr:last-child td { border-bottom: none; }
.metrics-table tbody tr:hover td { background: rgba(59,130,246,0.04); }

.metrics-table td:first-child {
  font-weight: 500;
  color: var(--text-primary);
}

.metric-value {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.metric-bar-mini {
  display: inline-block;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  vertical-align: middle;
  transition: width 0.8s ease;
}

.badge-best {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(14,165,233,0.15);
  border: 1px solid rgba(14,165,233,0.3);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--cyan-light);
  text-transform: uppercase;
  margin-left: 8px;
}

/* ── Footer ────────────────────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px 32px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.footer-sep { color: var(--border-hover); }

/* ── Animations ────────────────────────────────────────────────── */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .header-inner { padding: 12px 20px; }
  .logo-text { font-size: 17px; }
  .service-status { gap: 6px; }
  .status-pill { padding: 4px 8px; font-size: 10px; }

  .main { padding: 0 20px 60px; }
  .hero { padding: 48px 0 36px; }
  .hero-title { font-size: 36px; }

  .upload-section { grid-template-columns: 1fr; }
  .masks-grid { grid-template-columns: 1fr; }

  .metrics-table th,
  .metrics-table td { padding: 10px 16px; }
}