:root {
  --bg-color: #07111f;
  --text-color: #ffffff;
  --header-bg: linear-gradient(rgba(7,17,31,0.88), rgba(7,17,31,0.92));
  --card-bg: #0f172a;
  --border-color: #334155;
  --sub-text-color: #cbd5e1;
  --input-bg: #020617;
  --nav-logo-bg: #0f172a;
  --tab-inactive-bg: #111827;
  --kpi-sub-color: #94a3b8;
  --footer-bg: #020617;
  --chart-grid-color: #1e293b;
}

[data-theme="light"] {
  --bg-color: #f8fafc;
  --text-color: #0f172a;
  --header-bg: linear-gradient(rgba(248,250,252,0.88), rgba(248,250,252,0.92));
  --card-bg: #ffffff;
  --border-color: #e2e8f0;
  --sub-text-color: #475569;
  --input-bg: #f1f5f9;
  --nav-logo-bg: #e2e8f0;
  --tab-inactive-bg: #f1f5f9;
  --kpi-sub-color: #64748b;
  --footer-bg: #f1f5f9;
  --chart-grid-color: #e2e8f0;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

header {
  background: var(--header-bg),
    url("https://images.unsplash.com/photo-1540959733332-eab4deabeeaf?auto=format&fit=crop&w=1600&q=80");
  background-size: cover;
  background-position: center;
  padding: 28px 40px 70px;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--nav-logo-bg);
  border: 3px solid #cbd5e1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: bold;
  color: var(--text-color);
}

.brand h1 {
  font-size: 26px;
}

.brand p {
  font-size: 13px;
  color: var(--sub-text-color);
}

.nav-right {
  display: flex;
  gap: 12px;
  align-items: center;
}

select, button, input {
  font-size: 15px;
}

select {
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-color);
}

.login-btn, .theme-toggle-btn {
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-color);
  cursor: pointer;
}

.theme-toggle-btn {
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero h2 {
  font-size: 52px;
  line-height: 1.15;
  margin-bottom: 20px;
  font-family: Georgia, serif;
}

.hero p {
  color: var(--sub-text-color);
  font-size: 18px;
  max-width: 650px;
}

.tags {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag {
  padding: 10px 14px;
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  font-size: 14px;
  color: #ffffff; /* Keep tags readable */
}

.input-panel {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.35);
}

.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}

.tab {
  padding: 10px;
  text-align: center;
  background: var(--tab-inactive-bg);
  border-radius: 8px;
  color: var(--sub-text-color);
  font-size: 13px;
}

.tab.active {
  background: #0284c7;
  color: white;
}

.input-panel label {
  display: block;
  margin-top: 14px;
  margin-bottom: 6px;
  color: var(--sub-text-color);
  font-size: 14px;
}

.input-panel input {
  width: 100%;
  padding: 13px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--input-bg);
  color: var(--text-color);
}

.analyze-btn {
  width: 100%;
  margin-top: 22px;
  padding: 15px;
  background: linear-gradient(90deg, #0284c7, #38bdf8);
  border: none;
  border-radius: 10px;
  color: white;
  font-weight: bold;
  cursor: pointer;
}

main {
  padding: 28px 24px 50px;
  max-width: 1450px;
  margin: auto;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 6px 24px rgba(0,0,0,0.1);
}

.card h3 {
  margin-bottom: 16px;
  font-size: 18px;
  color: var(--text-color);
}

.kpi-row {
  display:grid;
  grid-template-columns: repeat(5, 1fr);
  gap:16px;
  margin-bottom:20px;
}

.kpi {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius:14px;
  padding:16px;
}

.kpi h4 {
  color: var(--kpi-sub-color);
  font-size:12px;
  margin-bottom:6px;
}

.kpi strong {
  font-size:22px;
}

.dashboard-grid {
  display:grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap:20px;
  margin-bottom:20px;
}

.score-circle {
  width: 160px;
  height: 160px;
  margin: auto;
  border-radius: 50%;
  border: 12px solid #22c55e;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.score-circle strong {
  font-size: 44px;
}

canvas {
  width: 100%;
  max-height: 260px;
}

.grid {
  display: grid;
  gap: 20px;
}

.bottom-grid {
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 24px;
}

.summary-list, .risk-list, .return-list {
  list-style: none;
}

.summary-list li,
.risk-list li,
.return-list li {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
  color: var(--sub-text-color);
}

.badge {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: bold;
}

.low { background: #14532d; color: #86efac; }
.medium { background: #713f12; color: #fde68a; }
.high { background: #7f1d1d; color: #fecaca; }

iframe {
  width: 100%;
  height: 230px;
  border: 0;
  border-radius: 12px;
}

.area-img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 14px;
}

.feature-row {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.feature {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  padding: 18px;
  border-radius: 14px;
  text-align: center;
}

.feature span {
  font-size: 34px;
  display: block;
  margin-bottom: 10px;
}

pre {
  white-space: pre-wrap;
  color: var(--sub-text-color);
  font-family: Arial, sans-serif;
  line-height: 1.7;
}

footer {
  padding: 32px;
  text-align: center;
  color: var(--kpi-sub-color);
  border-top: 1px solid var(--border-color);
  background: var(--footer-bg);
}

@media (max-width: 1100px) {
  .hero,
  .dashboard-grid,
  .bottom-grid,
  .feature-row,
  .kpi-row {
    grid-template-columns: 1fr;
  }

  nav {
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
  }

  .hero h2 {
    font-size: 38px;
  }
}