/* ========================================
   TradeTest.ai — Styles
   Light theme, Stripe-inspired
   Accent: #1a2b4a
   ======================================== */

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

:root {
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --text: #0a0a0a;
  --text-sec: #6b7280;
  --accent: #1a2b4a;
  --accent-light: #2a4a7a;
  --border: #e5e7eb;
  --white: #ffffff;
  --green: #16a34a;
  --red: #dc2626;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --max-w: 1200px;
  --nav-h: 72px;
  --tr: 0.2s ease;
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* Typography */
h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }
p  { color: var(--text-sec); font-size: 1.125rem; line-height: 1.7; }

/* Layout */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
section { padding: 100px 0; }
section.alt { background: var(--bg-alt); }

/* ---- Nav ---- */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000; display: flex; align-items: center;
}
.nav .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.nav-logo { display: flex; align-items: center; font-size: 1.375rem; color: var(--accent); letter-spacing: -0.02em; }
.nav-logo .logo-light { font-weight: 400; }
.nav-logo .logo-bold  { font-weight: 700; }

.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a { font-size: 0.9375rem; font-weight: 500; color: var(--text-sec); transition: color var(--tr); }
.nav-links a:hover, .nav-links a.active { color: var(--text); }

.nav-right { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  font-size: 0.8125rem; font-weight: 600; color: var(--text-sec);
  cursor: pointer; background: none; border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 6px; transition: all var(--tr);
}
.lang-toggle:hover { color: var(--text); border-color: var(--text); }

.nav-hamburger { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: all 0.3s ease; }

.nav-mobile {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: var(--white); border-bottom: 1px solid var(--border);
  padding: 16px 24px; z-index: 999;
}
.nav-mobile.open { display: block; }
.nav-mobile a { display: block; padding: 12px 0; font-size: 1rem; font-weight: 500; color: var(--text-sec); border-bottom: 1px solid var(--border); }
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover, .nav-mobile a.active { color: var(--text); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 28px; font-family: var(--font); font-size: 0.9375rem; font-weight: 600;
  border-radius: 8px; border: none; cursor: pointer; transition: all var(--tr);
}
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(26,43,74,0.25); }
.btn-secondary { background: transparent; color: var(--accent); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--accent); transform: translateY(-1px); }

/* ---- Hero ---- */
.hero { padding-top: calc(var(--nav-h) + 80px); padding-bottom: 100px; text-align: center; }
.hero h1 { max-width: 800px; margin: 0 auto 24px; }
.hero p  { max-width: 620px; margin: 0 auto 40px; font-size: 1.25rem; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; }

/* ---- Section Headers ---- */
.section-header { text-align: center; max-width: 700px; margin: 0 auto 64px; }
.section-label {
  display: inline-block; font-size: 0.8125rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin-bottom: 16px;
}
.section-header h2 { margin-bottom: 16px; }

/* ---- Steps ---- */
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 32px; }
.step { text-align: center; padding: 32px; }
.step-number {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--accent); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.125rem; font-weight: 700; margin: 0 auto 20px;
}
.step h3 { margin-bottom: 12px; font-size: 1.125rem; }
.step p  { font-size: 0.9375rem; }

/* ---- Demo Section ---- */
.demo-window {
  max-width: 960px; margin: 0 auto;
  border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; box-shadow: 0 8px 30px rgba(0,0,0,0.08);
}
.demo-header {
  background: #1e1e2e; padding: 12px 16px;
  display: flex; align-items: center; gap: 8px;
}
.demo-dot { width: 12px; height: 12px; border-radius: 50%; }
.demo-dot.r { background: #ff5f57; }
.demo-dot.y { background: #febc2e; }
.demo-dot.g { background: #28c840; }
.demo-header span { color: #888; font-size: 0.8125rem; margin-left: 12px; }

.demo-prompt {
  background: #1e1e2e; padding: 24px 32px;
  border-bottom: 1px solid #2a2a3e;
}
.demo-prompt-label {
  font-family: var(--mono); font-size: 0.75rem; font-weight: 600;
  color: #7c7c9a; text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 12px;
}
.demo-prompt-text {
  font-family: var(--mono); font-size: 0.875rem; line-height: 1.8;
  color: #e0e0e0; white-space: pre-wrap;
}
.demo-prompt-text .hl-asset { color: #f9a825; }
.demo-prompt-text .hl-indicator { color: #42a5f5; }
.demo-prompt-text .hl-action { color: #66bb6a; }
.demo-prompt-text .hl-number { color: #ef5350; }

.demo-params {
  background: #1e1e2e; padding: 16px 32px 24px;
  display: flex; gap: 24px; flex-wrap: wrap;
}
.demo-param {
  font-family: var(--mono); font-size: 0.8125rem; color: #7c7c9a;
}
.demo-param strong { color: #b0b0c8; }

.demo-results {
  background: var(--white); padding: 32px;
}
.demo-results-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 24px;
}
.demo-results-header h3 { font-size: 1.25rem; }
.demo-badge {
  font-size: 0.75rem; font-weight: 600; padding: 4px 12px;
  border-radius: 4px; background: #dcfce7; color: var(--green);
}

.demo-metrics {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 16px;
  margin-bottom: 24px;
}
.demo-metric {
  padding: 16px; background: var(--bg-alt); border-radius: 8px; text-align: center;
}
.demo-metric-value {
  font-size: 1.5rem; font-weight: 700; color: var(--text); line-height: 1;
  margin-bottom: 4px;
}
.demo-metric-value.positive { color: var(--green); }
.demo-metric-value.negative { color: var(--red); }
.demo-metric-label { font-size: 0.75rem; color: var(--text-sec); text-transform: uppercase; letter-spacing: 0.05em; }

.demo-chart {
  background: var(--bg-alt); border-radius: 8px; padding: 24px;
  margin-bottom: 16px;
}
.demo-chart-label { font-size: 0.75rem; color: var(--text-sec); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 12px; }

.demo-trades {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 12px;
}
.demo-trade {
  padding: 12px; background: var(--bg-alt); border-radius: 6px;
  font-size: 0.8125rem;
}
.demo-trade-type { font-weight: 600; font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
.demo-trade-type.win { color: var(--green); }
.demo-trade-type.loss { color: var(--red); }
.demo-trade p { color: var(--text-sec); font-size: 0.8125rem; line-height: 1.4; }

/* ---- Features Grid ---- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2,1fr); }
.grid-3 { grid-template-columns: repeat(3,1fr); }

.card {
  background: var(--white); border: 1px solid var(--border);
  border-radius: 12px; padding: 32px; transition: all var(--tr);
}
.card:hover { box-shadow: 0 8px 30px rgba(0,0,0,0.06); transform: translateY(-2px); }
.card-icon {
  width: 48px; height: 48px; background: var(--bg-alt); border-radius: 10px;
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px; color: var(--accent);
}
.card h3 { margin-bottom: 12px; font-size: 1.25rem; }
.card p  { font-size: 1rem; line-height: 1.6; }

.card-soon { position: relative; }
.soon-badge {
  position: absolute; top: 16px; right: 16px;
  font-size: 0.6875rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.05em; padding: 4px 10px; border-radius: 4px;
  background: #fef3c7; color: #92400e;
}

/* ---- Page Header ---- */
.page-header { padding-top: calc(var(--nav-h) + 60px); padding-bottom: 60px; text-align: center; }
.page-header h1 { font-size: 2.75rem; margin-bottom: 16px; }
.page-header p  { max-width: 600px; margin: 0 auto; }

/* ---- CTA ---- */
.cta-section { text-align: center; background: var(--accent); color: var(--white); padding: 80px 0; }
.cta-section h2 { color: var(--white); margin-bottom: 16px; }
.cta-section p  { color: rgba(255,255,255,0.75); max-width: 600px; margin: 0 auto 32px; }
.cta-section .btn-primary { background: var(--white); color: var(--accent); }
.cta-section .btn-primary:hover { background: rgba(255,255,255,0.9); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }

/* ---- Footer ---- */
.footer { background: var(--bg-alt); padding: 64px 0 32px; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-about { font-size: 1.375rem; color: var(--accent); letter-spacing: -0.02em; }
.footer-about .logo-light { font-weight: 400; }
.footer-about .logo-bold  { font-weight: 700; }
.footer-about p { font-size: 0.9375rem; margin-top: 16px; max-width: 300px; }
.footer-col h4 { font-size: 0.8125rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; color: var(--text); }
.footer-col a { display: block; font-size: 0.9375rem; color: var(--text-sec); margin-bottom: 10px; transition: color var(--tr); }
.footer-col a:hover { color: var(--text); }
.footer-social { display: inline-flex !important; align-items: center; gap: 6px; }
.footer-social svg { flex-shrink: 0; }
.footer-bottom { padding-top: 32px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p { font-size: 0.8125rem; color: var(--text-sec); }

/* ---- About ---- */
.about-content { max-width: 800px; margin: 0 auto; }
.about-content p { margin-bottom: 24px; }

.founder-section { display: grid; grid-template-columns: 260px 1fr; gap: 48px; align-items: center; max-width: 900px; margin: 0 auto; }
.founder-photo img { width: 260px; height: 260px; object-fit: cover; border-radius: 12px; filter: grayscale(20%); }
.founder-info h2 { margin-bottom: 16px; font-size: 1.75rem; }
.founder-info p { margin-bottom: 20px; }
.founder-links { display: flex; gap: 16px; }
.founder-links a {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 8px; background: var(--bg-alt);
  color: var(--accent); transition: all var(--tr);
}
.founder-links a:hover { background: var(--accent); color: var(--white); }

.built-by {
  text-align: center; padding: 32px; background: var(--bg-alt);
  border-radius: 12px; max-width: 600px; margin: 0 auto;
}
.built-by p { font-size: 1rem; margin-bottom: 12px; }
.built-by a { color: var(--accent); font-weight: 600; }
.built-by a:hover { text-decoration: underline; }

/* ---- Contact ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info-item { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 28px; }
.contact-info-item .icon {
  width: 44px; height: 44px; background: var(--bg-alt); border-radius: 10px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0; color: var(--accent);
}
.contact-info-item h4 { margin-bottom: 4px; }
.contact-info-item p  { font-size: 0.9375rem; }

.form-disabled { text-align: center; padding: 48px 24px; }
.form-disabled p { margin-bottom: 24px; }

/* ---- Scroll Animations ---- */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  h1 { font-size: 2.75rem; }
  h2 { font-size: 2rem; }
  .grid-3 { grid-template-columns: repeat(2,1fr); }
  .demo-metrics { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  section { padding: 64px 0; }
  .hero { padding-top: calc(var(--nav-h) + 48px); padding-bottom: 64px; }
  .nav-links { display: none; }
  .nav-hamburger { display: block; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .demo-metrics { grid-template-columns: 1fr 1fr; }
  .demo-params { flex-direction: column; gap: 8px; }
  .demo-trades { grid-template-columns: 1fr; }
  .demo-prompt { padding: 16px 20px; }
  .demo-results { padding: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .founder-section { grid-template-columns: 1fr; text-align: center; }
  .founder-photo img { width: 180px; height: 180px; margin: 0 auto; }
  .founder-links { justify-content: center; }
  .page-header h1 { font-size: 2.25rem; }
}