/* ═══════════════════════════════════════════════════════════════
   MOF-XRD Identifier — Design System
   Variables, Reset, Typography
═══════════════════════════════════════════════════════════════ */
:root {
  --bg: #0a0e1a;
  --bg2: #0f1628;
  --bg3: #141d35;
  --surface: #1a2540;
  --surface2: #1f2d4a;
  --border: rgba(99,179,237,0.15);
  --border-bright: rgba(99,179,237,0.35);
  --accent: #3b82f6;
  --accent2: #8b5cf6;
  --accent3: #06b6d4;
  --green: #10b981;
  --red: #ef4444;
  --orange: #f59e0b;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #64748b;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.6);
  --font: 'Inter', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

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

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.hidden { display: none !important; }
.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2), var(--accent3));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ═══ NAVBAR ═══════════════════════════════════════════════════ */
.navbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px;
  background: rgba(10,14,26,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; }
.nav-icon { font-size: 1.4rem; }
.nav-accent { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { color: var(--text2); text-decoration: none; font-size: 0.9rem; transition: color var(--transition); }
.nav-links a:hover { color: var(--text); }
.nav-gh {
  display: flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); padding: 6px 14px; border-radius: 20px;
  font-size: 0.85rem !important;
}
.nav-gh:hover { border-color: var(--accent) !important; color: var(--accent) !important; }

/* ═══ HERO ══════════════════════════════════════════════════════ */
.hero {
  position: relative; min-height: 92vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; padding: 80px 24px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: 0.18;
  animation: orbFloat 12s ease-in-out infinite;
}
.orb1 { width: 600px; height: 600px; background: radial-gradient(var(--accent), transparent); top: -200px; left: -150px; }
.orb2 { width: 400px; height: 400px; background: radial-gradient(var(--accent2), transparent); bottom: -100px; right: -100px; animation-delay: -4s; }
.orb3 { width: 300px; height: 300px; background: radial-gradient(var(--accent3), transparent); top: 40%; left: 50%; animation-delay: -8s; }
@keyframes orbFloat { 0%,100%{transform:translate(0,0) scale(1)} 50%{transform:translate(40px,-30px) scale(1.05)} }
#latticeCanvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.07; }

.hero-content { position: relative; z-index: 1; text-align: center; max-width: 800px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(59,130,246,0.12); border: 1px solid rgba(59,130,246,0.3);
  border-radius: 20px; padding: 6px 16px; font-size: 0.82rem; color: var(--accent); margin-bottom: 28px;
}
.badge-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.8)} }

.hero-title { font-size: clamp(2.8rem, 6vw, 5rem); font-weight: 800; line-height: 1.1; margin-bottom: 24px; letter-spacing: -1px; }
.hero-subtitle { font-size: 1.1rem; color: var(--text2); max-width: 600px; margin: 0 auto 36px; line-height: 1.75; }
.hero-subtitle em { color: var(--accent3); font-style: normal; }

.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: var(--white); padding: 14px 32px; border-radius: 40px;
  text-decoration: none; font-weight: 600; font-size: 1rem;
  transition: all var(--transition); box-shadow: 0 4px 20px rgba(59,130,246,0.35);
  border: none; cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(59,130,246,0.5); }
.btn-ghost {
  color: var(--text2); padding: 14px 32px; border-radius: 40px;
  border: 1px solid var(--border); background: transparent;
  text-decoration: none; font-weight: 500; transition: all var(--transition); cursor: pointer;
  font-size: 1rem;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-stats { display: flex; align-items: center; justify-content: center; gap: 0; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; align-items: center; padding: 0 32px; }
.stat-num { font-size: 2rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--accent3)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.8rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; margin-top: 2px; }
.stat-divider { width: 1px; height: 40px; background: var(--border); }

/* ═══ SECTION COMMON ════════════════════════════════════════════ */
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.5px; }
.section-header p { color: var(--text2); font-size: 1rem; max-width: 520px; margin: 0 auto; }

/* ═══ UPLOAD SECTION ════════════════════════════════════════════ */
.upload-section { padding: 100px 0 60px; }

.tab-switcher {
  display: flex; gap: 12px; margin-bottom: 28px;
  background: var(--bg3); padding: 6px; border-radius: var(--radius); width: fit-content; margin: 0 auto 28px;
}
.tab-btn {
  display: flex; flex-direction: column; align-items: center; padding: 12px 28px;
  border-radius: 12px; border: none; background: transparent;
  color: var(--text2); cursor: pointer; transition: all var(--transition);
  font-family: var(--font); font-size: 0.95rem; font-weight: 600;
  min-width: 180px;
}
.tab-sub { font-size: 0.72rem; font-weight: 400; color: var(--text3); margin-top: 2px; }
.tab-btn.active { background: var(--surface2); color: var(--text); box-shadow: var(--shadow); }
.tab-btn:hover:not(.active) { color: var(--text); }

.tab-content { display: none; }
.tab-content.active { display: block; }

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 60px 40px;
  text-align: center;
  background: var(--bg3);
  cursor: pointer;
  transition: all var(--transition);
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(59,130,246,0.05);
}
.upload-zone.has-file { border-color: var(--green); border-style: solid; }
.upload-icon { font-size: 3.5rem; margin-bottom: 16px; }
.upload-text { margin-bottom: 20px; }
.upload-text strong { display: block; font-size: 1.1rem; color: var(--text); margin-bottom: 4px; }
.upload-text span { font-size: 0.9rem; color: var(--text3); }
.upload-formats { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-bottom: 24px; }
.format-tag { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 3px 10px; font-size: 0.78rem; color: var(--accent3); font-family: var(--mono); }
.btn-upload { background: var(--accent); color: var(--white); border: none; padding: 11px 28px; border-radius: 30px; cursor: pointer; font-size: 0.9rem; font-weight: 600; transition: all var(--transition); }
.btn-upload:hover { background: #2563eb; transform: translateY(-1px); }

.column-config {
  background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; margin-top: 20px;
}
.column-config h4 { font-size: 0.95rem; color: var(--text2); margin-bottom: 16px; }
.config-row { display: flex; gap: 16px; flex-wrap: wrap; }
.config-item { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 180px; }
.config-item label { font-size: 0.82rem; color: var(--text3); font-weight: 500; }
.config-item select, .config-item input {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); padding: 8px 12px; font-size: 0.88rem; font-family: var(--font);
  outline: none; transition: border-color var(--transition);
}
.config-item select:focus, .config-item input:focus { border-color: var(--accent); }

.image-preview-wrap { position: relative; margin-top: 20px; border-radius: var(--radius); overflow: hidden; }
#image-preview { width: 100%; max-height: 400px; object-fit: contain; background: var(--bg3); display: block; border-radius: var(--radius); }
.image-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(10,14,26,0.9));
  padding: 24px 20px 16px; text-align: center;
}
#image-overlay-text { font-size: 0.88rem; color: var(--accent3); }

/* ═══ FILE INFO / SAMPLE ROW ════════════════════════════════════ */
.file-info {
  display: flex; align-items: center; gap: 14px;
  background: rgba(16,185,129,0.1); border: 1px solid rgba(16,185,129,0.3);
  border-radius: var(--radius-sm); padding: 14px 20px; margin-top: 16px;
}
.file-info-icon { font-size: 1.4rem; }
.file-info-details { display: flex; flex-direction: column; flex: 1; }
.file-info-details span:first-child { font-weight: 600; color: var(--text); font-size: 0.92rem; }
.file-info-details span:last-child { font-size: 0.78rem; color: var(--text3); }
.file-clear { background: none; border: 1px solid rgba(239,68,68,0.4); color: var(--red); border-radius: 6px; padding: 5px 12px; cursor: pointer; font-size: 0.8rem; transition: all var(--transition); }
.file-clear:hover { background: rgba(239,68,68,0.1); }

.sample-row { display: flex; align-items: center; justify-content: center; gap: 12px; margin: 20px 0; font-size: 0.88rem; color: var(--text3); flex-wrap: wrap; }
.btn-sample { background: none; border: 1px solid var(--border); color: var(--accent3); padding: 6px 16px; border-radius: 20px; cursor: pointer; font-size: 0.83rem; transition: all var(--transition); font-family: var(--font); }
.btn-sample:hover { border-color: var(--accent3); background: rgba(6,182,212,0.08); }

.analyse-wrap { text-align: center; margin-top: 28px; }
.btn-analyse {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: var(--white); border: none; padding: 18px 56px;
  border-radius: 40px; font-size: 1.1rem; font-weight: 700;
  cursor: pointer; transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(59,130,246,0.35); font-family: var(--font);
  display: inline-flex; align-items: center; gap: 10px;
}
.btn-analyse:disabled { opacity: 0.4; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.btn-analyse:not(:disabled):hover { transform: translateY(-3px); box-shadow: 0 8px 32px rgba(59,130,246,0.5); }
.analyse-icon { font-size: 1.3rem; }

/* ═══ PROGRESS ══════════════════════════════════════════════════ */
.analysis-progress {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,14,26,0.92); backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
}
.progress-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 48px 56px;
  text-align: center; min-width: 400px;
  box-shadow: var(--shadow-lg);
}
.progress-spinner {
  width: 56px; height: 56px; border-radius: 50%;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
  margin: 0 auto 28px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.progress-steps { display: flex; flex-direction: column; gap: 14px; text-align: left; }
.progress-step { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-radius: var(--radius-sm); transition: all var(--transition); }
.progress-step.active { background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.25); }
.progress-step.done { background: rgba(16,185,129,0.08); border: 1px solid rgba(16,185,129,0.2); }
.step-icon { font-size: 1.1rem; width: 28px; text-align: center; }
.step-label { flex: 1; font-size: 0.9rem; color: var(--text2); }
.progress-step.active .step-label { color: var(--text); font-weight: 500; }
.step-status { font-size: 0.78rem; color: var(--text3); font-family: var(--mono); }
.progress-step.active .step-status { color: var(--accent); }
.progress-step.done .step-status { color: var(--green); }

/* ═══ RESULTS ═══════════════════════════════════════════════════ */
.results-section { padding: 80px 0; }
.results-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; flex-wrap: wrap; gap: 16px; }
.results-header h2 { font-size: 2rem; font-weight: 800; }
.btn-new { background: none; border: 1px solid var(--border); color: var(--text2); padding: 10px 22px; border-radius: 20px; cursor: pointer; font-size: 0.88rem; transition: all var(--transition); font-family: var(--font); }
.btn-new:hover { border-color: var(--accent); color: var(--accent); }

/* ═══ VERDICT CARD ══════════════════════════════════════════════ */
.verdict-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
  display: flex; align-items: center; gap: 28px;
  margin-bottom: 28px; flex-wrap: wrap;
}
.verdict-card.is-mof { border-color: rgba(16,185,129,0.4); background: rgba(16,185,129,0.05); }
.verdict-card.not-mof { border-color: rgba(239,68,68,0.4); background: rgba(239,68,68,0.05); }
.verdict-card.partial-mof { border-color: rgba(245,158,11,0.4); background: rgba(245,158,11,0.05); }
.verdict-icon { font-size: 3.5rem; }
.verdict-body { flex: 1; }
.verdict-title { font-size: 1.8rem; font-weight: 800; margin-bottom: 6px; }
.verdict-subtitle { color: var(--text2); font-size: 0.95rem; margin-bottom: 14px; line-height: 1.6; }
.verdict-badges { display: flex; flex-wrap: wrap; gap: 8px; }
.verdict-badge { padding: 4px 12px; border-radius: 14px; font-size: 0.78rem; font-weight: 600; border: 1px solid; }
.badge-green { background: rgba(16,185,129,0.15); border-color: rgba(16,185,129,0.4); color: var(--green); }
.badge-blue { background: rgba(59,130,246,0.15); border-color: rgba(59,130,246,0.4); color: var(--accent); }
.badge-orange { background: rgba(245,158,11,0.15); border-color: rgba(245,158,11,0.4); color: var(--orange); }
.badge-red { background: rgba(239,68,68,0.15); border-color: rgba(239,68,68,0.4); color: var(--red); }
.badge-cyan { background: rgba(6,182,212,0.15); border-color: rgba(6,182,212,0.4); color: var(--accent3); }

/* Donut */
.verdict-donut { position: relative; width: 120px; height: 120px; flex-shrink: 0; }
.verdict-donut svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.donut-bg { fill: none; stroke: var(--surface2); stroke-width: 10; }
.donut-fill { fill: none; stroke-width: 10; stroke-linecap: round; transition: stroke-dasharray 1.2s cubic-bezier(0.4,0,0.2,1); }
.donut-fill.green-fill { stroke: var(--green); }
.donut-fill.orange-fill { stroke: var(--orange); }
.donut-fill.red-fill { stroke: var(--red); }
.donut-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.donut-pct { font-size: 1.5rem; font-weight: 800; line-height: 1; }
.donut-label { font-size: 0.7rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; }

/* ═══ CHART CARD ════════════════════════════════════════════════ */
.chart-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; margin-bottom: 24px;
}
.chart-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.chart-card-header h3 { font-size: 1.1rem; font-weight: 700; }
.chart-legend { display: flex; gap: 16px; flex-wrap: wrap; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text2); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; }
.legend-dot.blue { background: var(--accent); }
.legend-dot.green { background: var(--green); }
.legend-dot.red { background: var(--red); }
.chart-wrap { position: relative; height: 320px; }

/* ═══ PEAK TABLE ════════════════════════════════════════════════ */
.peak-table-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; margin-bottom: 24px;
}
.peak-table-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.peak-table-header h3 { font-size: 1.1rem; font-weight: 700; }
.peak-count { background: var(--surface2); color: var(--accent3); border-radius: 12px; padding: 3px 12px; font-size: 0.8rem; font-family: var(--mono); }
.table-scroll { overflow-x: auto; border-radius: var(--radius-sm); }
.peak-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.peak-table th {
  background: var(--bg3); color: var(--text3); font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.5px; padding: 10px 14px;
  text-align: left; font-weight: 600; white-space: nowrap;
}
.peak-table td { padding: 10px 14px; border-bottom: 1px solid rgba(255,255,255,0.04); color: var(--text2); white-space: nowrap; }
.peak-table td:first-child { color: var(--text3); font-family: var(--mono); font-size: 0.8rem; }
.peak-table td .val { font-family: var(--mono); font-weight: 600; color: var(--text); }
.peak-table tr:hover td { background: rgba(255,255,255,0.02); }
.match-yes { color: var(--green); font-size: 0.8rem; font-weight: 600; }
.match-no { color: var(--red); font-size: 0.8rem; }
.match-partial { color: var(--orange); font-size: 0.8rem; }
.status-primary { background: rgba(59,130,246,0.15); color: var(--accent); padding: 2px 8px; border-radius: 8px; font-size: 0.75rem; font-weight: 600; }
.status-secondary { background: rgba(148,163,184,0.1); color: var(--text3); padding: 2px 8px; border-radius: 8px; font-size: 0.75rem; }
.peak-low-angle { background: rgba(16,185,129,0.05); }

/* ═══ TOP MATCHES ════════════════════════════════════════════════ */
.matches-section { margin-bottom: 24px; }
.matches-section h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 16px; }
.matches-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.match-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px;
  transition: all var(--transition); cursor: default;
  position: relative; overflow: hidden;
}
.match-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}
.match-card:hover { border-color: var(--border-bright); transform: translateY(-2px); box-shadow: var(--shadow); }
.match-card:hover::before { transform: scaleX(1); }
.match-card.rank-1::before { transform: scaleX(1); background: linear-gradient(90deg, var(--green), #34d399); }
.match-rank { font-size: 0.72rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; display: flex; align-items: center; gap: 6px; }
.match-rank .rank-num { background: var(--surface2); padding: 1px 7px; border-radius: 8px; font-family: var(--mono); color: var(--accent); }
.match-name { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.match-refcode { font-family: var(--mono); font-size: 0.78rem; color: var(--accent3); margin-bottom: 12px; }
.match-meta { display: flex; flex-direction: column; gap: 5px; margin-bottom: 12px; }
.match-meta-row { display: flex; justify-content: space-between; font-size: 0.8rem; }
.match-meta-key { color: var(--text3); }
.match-meta-val { color: var(--text); font-family: var(--mono); font-size: 0.78rem; }
.match-score-bar { height: 5px; background: var(--surface2); border-radius: 3px; overflow: hidden; margin-top: 10px; }
.match-score-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--green)); border-radius: 3px; transition: width 1s cubic-bezier(0.4,0,0.2,1); }
.match-score-label { display: flex; justify-content: space-between; font-size: 0.75rem; margin-top: 4px; }
.match-score-label span:first-child { color: var(--text3); }
.match-score-label span:last-child { color: var(--accent); font-weight: 600; font-family: var(--mono); }

/* ═══ PARAMS CARD ═══════════════════════════════════════════════ */
.params-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; margin-bottom: 24px;
}
.params-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 20px; }
.params-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; }
.param-item { background: var(--bg3); border-radius: var(--radius-sm); padding: 14px; text-align: center; }
.param-label { font-size: 0.75rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
.param-val { font-size: 1.3rem; font-weight: 700; color: var(--text); font-family: var(--mono); }
.param-unit { font-size: 0.7rem; color: var(--text3); margin-top: 2px; }

/* ═══ EXPORT ROW ════════════════════════════════════════════════ */
.export-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.btn-export {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text2); padding: 10px 20px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 0.85rem; font-family: var(--font);
  transition: all var(--transition); font-weight: 500;
}
.btn-export:hover { border-color: var(--accent); color: var(--accent); background: rgba(59,130,246,0.08); }

/* ═══ HOW SECTION ═══════════════════════════════════════════════ */
.how-section { padding: 100px 0; background: var(--bg2); }
.steps-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 20px; margin-bottom: 40px; }
.step-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; position: relative;
  transition: all var(--transition);
}
.step-card:hover { border-color: var(--border-bright); transform: translateY(-3px); box-shadow: var(--shadow); }
.step-num { font-size: 2.5rem; font-weight: 900; color: rgba(59,130,246,0.15); line-height: 1; margin-bottom: 4px; font-family: var(--mono); }
.step-icon-lg { font-size: 2rem; margin-bottom: 14px; }
.step-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.step-card p { font-size: 0.85rem; color: var(--text2); line-height: 1.6; }
.tech-row { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tech-badge {
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.25);
  color: var(--accent); padding: 6px 16px; border-radius: 20px; font-size: 0.8rem; font-weight: 500;
}

/* ═══ ABOUT SECTION ═════════════════════════════════════════════ */
.about-section { padding: 100px 0; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
@media (max-width: 768px) { .about-grid { grid-template-columns: 1fr; } }
.about-text h2 { font-size: 2rem; font-weight: 800; margin-bottom: 16px; }
.about-text p { color: var(--text2); margin-bottom: 14px; font-size: 0.95rem; line-height: 1.75; }
.about-links { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.about-stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.about-stat {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; text-align: center;
}
.about-stat-num { display: block; font-size: 2.2rem; font-weight: 900; background: linear-gradient(135deg,var(--accent),var(--accent3)); -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text; margin-bottom: 6px; }
.about-stat-label { font-size: 0.82rem; color: var(--text3); }

/* ═══ FOOTER ════════════════════════════════════════════════════ */
.footer { background: var(--bg2); border-top: 1px solid var(--border); padding: 60px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand .nav-icon { font-size: 1.6rem; }
.footer-brand p { color: var(--text3); font-size: 0.84rem; margin-top: 10px; line-height: 1.6; max-width: 260px; }
.footer-links h5 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text3); margin-bottom: 14px; font-weight: 600; }
.footer-links a { display: block; color: var(--text2); text-decoration: none; font-size: 0.88rem; margin-bottom: 9px; transition: color var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; text-align: center; }
.footer-bottom p { color: var(--text3); font-size: 0.78rem; margin-bottom: 4px; }

/* ═══ TOAST ═════════════════════════════════════════════════════ */
.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 500; display: flex; flex-direction: column; gap: 10px; }
.toast {
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 14px 20px;
  font-size: 0.88rem; color: var(--text);
  animation: slideIn 0.3s ease; max-width: 320px;
  box-shadow: var(--shadow);
}
.toast.success { border-color: rgba(16,185,129,0.4); }
.toast.error { border-color: rgba(239,68,68,0.4); }
.toast.info { border-color: rgba(59,130,246,0.4); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ═══ RESPONSIVE ════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .navbar { padding: 14px 16px; }
  .nav-links { display: none; }
  .hero-title { font-size: 2.6rem; }
  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }
  .stat { padding: 0 12px; }
  .tab-switcher { flex-direction: column; width: 100%; }
  .tab-btn { min-width: auto; }
  .verdict-card { flex-direction: column; text-align: center; }
  .verdict-donut { margin: 0 auto; }
}

/* ═══ CRYSTALLINITY INDICATOR ═══════════════════════════════════ */
.crystallinity-bar-wrap { margin-top: 16px; }
.crystallinity-label { display: flex; justify-content: space-between; font-size: 0.82rem; margin-bottom: 6px; }
.crystallinity-label span:first-child { color: var(--text3); }
.crystallinity-label span:last-child { font-weight: 600; font-family: var(--mono); }
.crystallinity-bar { height: 8px; background: var(--surface2); border-radius: 4px; overflow: hidden; }
.crystallinity-fill { height: 100%; border-radius: 4px; transition: width 1.4s cubic-bezier(0.4,0,0.2,1); }