@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
  --black: #000000;
  --white: #ffffff;
  --surface: #f5f5f5;
  --muted: #666666;
  --border: #e0e0e0;
}

html { font-size: 16px; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--black); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 40px;
}

.nav-inner {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--black);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  font-weight: 400;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--black); text-decoration: none; }

/* Fix: nav-links a color override must not affect btn */
.nav-links a.btn { color: var(--white); }
.nav-links a.btn:hover { color: var(--black); }

.btn {
  display: inline-block;
  background: var(--black);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 18px;
  border: 1px solid var(--black);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  border-radius: 0;
  letter-spacing: 0.01em;
}

.btn:hover { background: var(--white); color: var(--black); text-decoration: none; }

.btn-outline {
  background: var(--white);
  color: var(--black);
}
.btn-outline:hover { background: var(--black); color: var(--white); }

/* ── LAYOUT ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
}

.page-section {
  padding: 80px 0;
}

.page-section + .page-section {
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}

h1 { font-size: 42px; font-weight: 600; line-height: 1.15; letter-spacing: -0.02em; }
h2 { font-size: 28px; font-weight: 600; line-height: 1.2; letter-spacing: -0.015em; }
h3 { font-size: 18px; font-weight: 600; line-height: 1.3; }

p { font-size: 15px; color: var(--muted); line-height: 1.7; }

.text-black { color: var(--black); }
.text-muted { color: var(--muted); }

/* ── DIVIDER ── */
hr { border: none; border-top: 1px solid var(--border); margin: 0; }

/* ── SURFACE BLOCK ── */
.surface {
  background: var(--surface);
  padding: 32px;
}

/* ── GRID ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 32px; }

/* ── FOOTER ── */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 32px 40px;
}

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

.footer-left { font-size: 13px; color: var(--muted); }

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--black); }

.footer-social {
  display: flex;
  gap: 16px;
  align-items: center;
}

.footer-social a { color: var(--muted); display: flex; align-items: center; }
.footer-social a:hover { color: var(--black); }

/* ── FORM ── */
.form-group { margin-bottom: 20px; }

label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--black);
  margin-bottom: 6px;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 10px 14px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--black);
  outline: none;
  border-radius: 0;
  transition: border-color 0.15s;
  -webkit-appearance: none;
}

input:focus, textarea:focus, select:focus { border-color: var(--black); }
textarea { resize: vertical; min-height: 120px; }

/* ── TABLE ── */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); padding: 10px 0; border-bottom: 1px solid var(--border); text-align: left; }
td { padding: 12px 0; border-bottom: 1px solid var(--border); color: var(--black); }
tr:last-child td { border-bottom: none; }

/* ── HERO ── */
.hero { padding: 100px 0 80px; }
.hero h1 { max-width: 700px; margin-bottom: 24px; }
.hero p { max-width: 540px; font-size: 16px; margin-bottom: 36px; }

/* ── STAT ROW ── */
.stat-row { display: flex; gap: 48px; flex-wrap: wrap; justify-content: space-between; }
.stat-item { text-align: center; flex: 1; }
.stat-item {}
.stat-value { font-size: 28px; font-weight: 600; letter-spacing: -0.02em; color: var(--black); line-height: 1; }
.stat-label { font-size: 12px; color: var(--muted); margin-top: 6px; letter-spacing: 0.02em; max-width: 160px; margin-left: auto; margin-right: auto; }

/* ── SIGNAL CARDS ── */
.signal-btn {
  width: 100%;
  padding: 20px 24px;
  background: var(--white);
  border: 1px solid var(--border);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--black);
  cursor: pointer;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.15s;
  margin-bottom: 1px;
}

.signal-btn:hover { background: var(--surface); }
.signal-btn.active { background: var(--black); color: var(--white); }
.signal-btn .arrow { font-size: 16px; }

.signal-results { margin-top: 24px; }
.signal-results h3 { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }

.stock-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stock-tag {
  font-size: 13px;
  font-weight: 500;
  padding: 6px 12px;
  background: var(--surface);
  color: var(--black);
  border: 1px solid var(--border);
  letter-spacing: 0.02em;
}

.empty-state {
  font-size: 14px;
  color: var(--muted);
  padding: 24px 0;
}

/* ── LOGIN PAGE ── */
.login-wrap {
  min-height: calc(100vh - 57px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.login-card {
  width: 100%;
  max-width: 400px;
}

.login-card h2 { margin-bottom: 8px; }
.login-card .subtitle { font-size: 14px; color: var(--muted); margin-bottom: 36px; }

.login-error {
  font-size: 13px;
  color: #c00;
  margin-bottom: 16px;
  display: none;
}

/* ── DASHBOARD ── */
.dashboard-wrap { padding: 60px 0; }
.dashboard-header { margin-bottom: 40px; }
.dashboard-header h2 { margin-bottom: 6px; }
.update-time { font-size: 13px; color: var(--muted); }

/* ── DISCLAIMER ── */
.disclaimer-bar {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 12px 40px;
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  nav { padding: 0 20px; }
  .container { padding: 0 20px; }
  .page-section { padding: 60px 0; }
  h1 { font-size: 30px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero { padding: 60px 0 40px; }
  footer { padding: 24px 20px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .stat-row { gap: 32px; }
  .disclaimer-bar { padding: 12px 20px; }
}