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

:root {
  --bg:        #f0f2f8;
  --bg2:       #e6e9f4;
  --surface:   #ffffff;
  --surface2:  #f5f6fb;
  --border:    #d5d9ed;
  --text:      #1a1d2e;
  --text2:     #5a6080;
  --primary:   #4361ee;
  --primary-light: #e8ecfd;
  --primary-g: linear-gradient(135deg, #4361ee, #7209b7);
  --safe:      #0b9e75;
  --safe-bg:   #e6f7f2;
  --suspicious:#c9860a;
  --suspicious-bg: #fff8e6;
  --dangerous: #d0192a;
  --dangerous-bg: #fdeaec;
  --emergency: #c05a14;
  --emergency-bg: #fff3eb;
  --radius:    12px;
  --shadow:    0 2px 12px rgba(67,97,238,0.10);
  --shadow-md: 0 4px 20px rgba(67,97,238,0.13);
}

html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── Header ────────────────────────────────────────────────── */
.header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 6px rgba(67,97,238,0.07);
  position: sticky; top: 0; z-index: 100;
}
.header-inner {
  max-width: 1400px; margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex; align-items: center; gap: 24px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { display: flex; }
.logo-text {
  font-size: 1.15rem; font-weight: 800;
  background: var(--primary-g);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo-sub { font-size: 0.62rem; font-weight: 700; letter-spacing: 1px; }

.nav { display: flex; gap: 2px; flex: 1; justify-content: center; }
.nav-btn {
  background: none; border: none; color: var(--text2);
  padding: 6px 18px; border-radius: 8px;
  font-family: inherit; font-size: 0.875rem; font-weight: 500;
  cursor: pointer; transition: all 0.18s;
}
.nav-btn:hover { background: var(--primary-light); color: var(--primary); }
.nav-btn.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.header-status {
  display: flex; align-items: center; gap: 7px;
  font-size: 0.8rem; color: var(--text2);
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text2); transition: background 0.3s;
}
.status-dot.online  { background: var(--safe); }
.status-dot.offline { background: var(--dangerous); }

/* ── Main ──────────────────────────────────────────────────── */
.main { max-width: 1400px; margin: 0 auto; padding: 24px 24px; }

/* ── Tabs ──────────────────────────────────────────────────── */
.tab-panel { display: none; animation: fadeIn 0.25s ease; }
.tab-panel.active { display: block; }
@keyframes fadeIn { from { opacity:0; transform:translateY(6px); } to { opacity:1; transform:none; } }

/* ── Stats Row ─────────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px; margin-bottom: 20px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  display: flex; align-items: center; gap: 12px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s;
}
.stat-card:hover { box-shadow: var(--shadow-md); }
.stat-body { display: flex; flex-direction: column; }
.stat-value { font-size: 1.5rem; font-weight: 700; line-height: 1; color: var(--text); }
.stat-label { font-size: 0.72rem; color: var(--text2); margin-top: 3px; }

/* colored left border per stat */
.stat-card:nth-child(1) { border-left: 3px solid var(--safe); }
.stat-card:nth-child(2) { border-left: 3px solid var(--dangerous); }
.stat-card:nth-child(3) { border-left: 3px solid var(--suspicious); }
.stat-card:nth-child(4) { border-left: 3px solid var(--emergency); }
.stat-card:nth-child(5) { border-left: 3px solid var(--primary); }

/* ── Two Column ────────────────────────────────────────────── */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

/* ── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-header {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface2);
}
.card-header h2 { font-size: 1rem; font-weight: 600; color: var(--text); }

.badge {
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.4px;
  padding: 3px 10px; border-radius: 20px;
  background: var(--bg2); color: var(--text2);
  border: 1px solid var(--border);
}
.badge-ai { background: var(--primary-light); color: var(--primary); border-color: #c0cafd; }
.badge-blockchain { background: #f3eaff; color: #7209b7; border-color: #dfc8ff; }

/* ── Form ──────────────────────────────────────────────────── */
.form { padding: 18px 22px; display: flex; flex-direction: column; gap: 13px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 0.78rem; font-weight: 600; color: var(--text2); }

.section-title {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 1px;
  color: var(--primary); text-transform: uppercase;
  padding-top: 4px; border-top: 1px solid var(--border);
  margin-top: 2px;
}

input[type="text"],
input[type="number"],
select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 12px;
  font-family: inherit; font-size: 0.875rem;
  transition: border-color 0.18s, box-shadow 0.18s;
  outline: none;
  width: 100%;
}
input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(67,97,238,0.10);
}

/* ── Toggle ────────────────────────────────────────────────── */
.toggle-group { flex-direction: row; align-items: center; justify-content: space-between; }
.toggle { position: relative; display: inline-block; width: 42px; height: 23px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute; cursor: pointer; inset: 0;
  background: #dde1f0;
  border-radius: 23px; transition: 0.25s;
}
.toggle-slider::before {
  content: ""; position: absolute;
  width: 17px; height: 17px; left: 3px; top: 3px;
  background: white; border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  transition: 0.25s;
}
.toggle input:checked + .toggle-slider { background: var(--primary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(19px); }

/* ── Buttons ────────────────────────────────────────────────── */
.btn-group { display: flex; gap: 10px; padding-top: 4px; }
.btn {
  flex: 1; padding: 10px 18px; border-radius: 9px;
  font-family: inherit; font-size: 0.875rem; font-weight: 600;
  cursor: pointer; transition: all 0.18s; border: none;
}
.btn-primary {
  background: var(--primary-g); color: white;
  box-shadow: 0 3px 10px rgba(67,97,238,0.25);
}
.btn-primary:hover { opacity: 0.92; transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.55; transform: none; cursor: not-allowed; }
.btn-secondary {
  background: var(--dangerous-bg); color: var(--dangerous);
  border: 1px solid #f3b5bb;
}
.btn-secondary:hover { background: #fad6d9; }
.btn-sm {
  background: var(--surface2); color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 14px; font-size: 0.8rem; flex: none;
}
.btn-sm:hover { background: var(--bg2); }

/* ── Result Panel ───────────────────────────────────────────── */
.gauge-wrap { display: flex; justify-content: center; padding: 20px 22px 4px; }
.gauge { width: 190px; }
#gaugeArc { transition: stroke-dashoffset 0.8s cubic-bezier(0.34,1.56,0.64,1); }

.prob-bars { padding: 4px 22px 14px; display: flex; flex-direction: column; gap: 9px; }
.prob-row { display: flex; align-items: center; gap: 10px; font-size: 0.8rem; }
.prob-row > span:first-child { width: 78px; color: var(--text2); font-weight: 500; }
.prob-row > span:last-child { width: 46px; text-align: right; font-weight: 700; font-family: 'JetBrains Mono',monospace; color: var(--text); }
.prob-track { flex: 1; height: 7px; background: var(--bg); border-radius: 4px; overflow: hidden; border: 1px solid var(--border); }
.prob-fill { height: 100%; border-radius: 4px; transition: width 0.6s ease; }
.prob-fill.safe { background: var(--safe); }
.prob-fill.susp { background: var(--suspicious); }
.prob-fill.dang { background: var(--dangerous); }

.result-details { padding: 0 22px 14px; }
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.detail-item {
  background: var(--surface2); border-radius: 8px;
  padding: 9px 12px; border: 1px solid var(--border);
}
.detail-label { font-size: 0.7rem; color: var(--text2); margin-bottom: 2px; font-weight: 500; }
.detail-value { font-size: 0.875rem; font-weight: 700; color: var(--text); }
.detail-value.mono { font-family: 'JetBrains Mono',monospace; font-size: 0.72rem; word-break: break-all; font-weight: 400; }

.blockchain-badge {
  margin: 0 22px 18px;
  display: flex; align-items: center; gap: 12px;
  background: #f3eaff; border: 1px solid #dfc8ff;
  border-radius: 9px; padding: 12px 14px;
}
.chain-title { font-weight: 600; font-size: 0.85rem; color: #7209b7; }
.chain-sub { font-size: 0.73rem; color: var(--text2); }

/* ── Audit Table ────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
.audit-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.audit-table th {
  background: var(--surface2); color: var(--text2);
  font-weight: 600; font-size: 0.72rem; letter-spacing: 0.4px;
  padding: 11px 15px; text-align: left;
  border-bottom: 1px solid var(--border);
}
.audit-table td {
  padding: 10px 15px; border-bottom: 1px solid var(--bg2);
  color: var(--text);
}
.audit-table tbody tr:hover { background: var(--surface2); }
.empty-state { text-align: center; color: var(--text2); padding: 40px !important; }

.decision-badge {
  display: inline-block; padding: 2px 9px; border-radius: 10px;
  font-size: 0.72rem; font-weight: 700;
}
.dec-approved  { background: var(--safe-bg); color: var(--safe); }
.dec-denied    { background: var(--dangerous-bg); color: var(--dangerous); }
.dec-suspicious{ background: var(--suspicious-bg); color: var(--suspicious); }
.dec-emergency { background: var(--emergency-bg); color: var(--emergency); }

.header-actions { display: flex; align-items: center; gap: 10px; }
.search-box {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px; padding: 6px 12px;
  font-family: inherit; font-size: 0.8rem; width: 230px; outline: none;
}
.search-box:focus { border-color: var(--primary); }

/* ── ML Models Tab ──────────────────────────────────────────── */
.model-table-wrap { padding: 22px; }
.model-table { width: 100%; border-collapse: collapse; margin-bottom: 18px; }
.model-table th {
  background: var(--surface2); color: var(--text2);
  font-weight: 600; font-size: 0.73rem; letter-spacing: 0.4px;
  padding: 11px 15px; text-align: left; border-bottom: 1px solid var(--border);
}
.model-table td { padding: 12px 15px; border-bottom: 1px solid var(--bg2); font-size: 0.875rem; }
.model-table tbody tr:hover { background: var(--surface2); }
.best-row { background: var(--primary-light) !important; }
.best-row td:first-child { font-weight: 700; color: var(--primary); }
.crown { font-size: 0.9rem; margin-left: 5px; }

.metric-bar { display: flex; align-items: center; gap: 8px; }
.metric-track { flex: 1; height: 7px; background: var(--bg); border-radius: 4px; overflow: hidden; min-width: 70px; border: 1px solid var(--border); }
.metric-fill { height: 100%; border-radius: 4px; background: var(--primary-g); transition: width 0.6s ease; }
.metric-num { font-family: 'JetBrains Mono',monospace; font-size: 0.8rem; font-weight: 600; min-width: 50px; color: var(--text); }

/* ── Smart Contract Tab ─────────────────────────────────────── */
.contract-view { padding: 22px; display: flex; flex-direction: column; gap: 22px; }
.contract-section h3 { font-size: 1rem; margin-bottom: 6px; color: var(--text); }
.contract-desc { color: var(--text2); font-size: 0.875rem; }

.flow-diagram {
  display: flex; align-items: center; justify-content: center;
  gap: 10px; flex-wrap: wrap;
  padding: 18px; background: var(--bg); border-radius: 10px;
  border: 1px solid var(--border);
}
.flow-node {
  text-align: center; padding: 10px 18px; border-radius: 9px;
  font-size: 0.8rem; font-weight: 600; line-height: 1.4;
  border: 1px solid var(--border);
}
.flow-node small { font-weight: 400; color: var(--text2); display: block; }
.node-user  { background: var(--primary-light); border-color: #c0cafd; color: var(--primary); }
.node-ai    { background: var(--safe-bg); border-color: #b2e8d8; color: var(--safe); }
.node-sc    { background: var(--suspicious-bg); border-color: #fce5b0; color: var(--suspicious); }
.node-chain { background: #f3eaff; border-color: #dfc8ff; color: #7209b7; }
.flow-arrow { color: var(--text2); font-size: 1.1rem; }

.policy-cards { display: grid; grid-template-columns: repeat(4,1fr); gap: 11px; }
.policy-card {
  border-radius: 9px; padding: 14px;
  border: 1px solid var(--border);
  background: var(--surface2);
}
.policy-card h4 { font-size: 0.81rem; margin-bottom: 6px; color: var(--text); }
.policy-card p { font-size: 0.76rem; color: var(--text2); }
.policy-card.safe     { border-left: 3px solid var(--safe); }
.policy-card.suspicious{ border-left: 3px solid var(--suspicious); }
.policy-card.dangerous{ border-left: 3px solid var(--dangerous); }
.policy-card.emergency{ border-left: 3px solid var(--emergency); }

.sc-features { display: flex; flex-direction: column; gap: 10px; }
.sc-feat {
  display: flex; gap: 12px; align-items: flex-start;
  background: var(--surface2); border-radius: 9px; padding: 13px;
  border: 1px solid var(--border);
}
.sc-feat div { font-size: 0.83rem; color: var(--text2); }
.sc-feat strong { color: var(--text); display: block; margin-bottom: 2px; }

/* ── Toast ──────────────────────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: white; border: 1px solid var(--border);
  color: var(--text); border-radius: 9px;
  padding: 11px 18px; font-size: 0.875rem;
  box-shadow: var(--shadow-md); z-index: 9999;
  transform: translateY(70px); opacity: 0;
  transition: all 0.3s cubic-bezier(0.34,1.56,0.64,1);
  max-width: 320px;
}
.toast.show { transform: translateY(0); opacity: 1; }

.loading { text-align: center; color: var(--text2); padding: 40px; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .two-col { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(3,1fr); }
  .policy-cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .stats-row { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .nav { display: none; }
}