/* ============================================================
   CassTrader Playbook — style.css
   Dark crypto aesthetic. Solana green. Premium.
   ============================================================ */

/* ── Variables ── */
:root {
  --bg: #0a0a0a;
  --bg-surface: #111111;
  --bg-card: #141414;
  --bg-card-hover: #181818;
  --accent: #14F195;
  --accent-dim: rgba(20, 241, 149, 0.12);
  --accent-glow: rgba(20, 241, 149, 0.25);
  --accent-glow-strong: rgba(20, 241, 149, 0.45);
  --white: #ffffff;
  --white-70: rgba(255, 255, 255, 0.7);
  --white-40: rgba(255, 255, 255, 0.4);
  --white-15: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(20, 241, 149, 0.3);
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --max-w: 1100px;
  --nav-h: 70px;
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ── Typography ── */
h1, h2, h3, h4 { font-family: var(--font-heading); line-height: 1.15; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; font-weight: 600; }
p { color: var(--white-70); }
.accent { color: var(--accent); }

/* ── Layout ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Section Labels ── */
.section-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-title { margin-bottom: 16px; }
.section-sub {
  color: var(--white-70);
  font-size: 1.05rem;
  max-width: 620px;
  margin-bottom: 56px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: #fff;
  border-color: #fff;
  box-shadow: 0 0 28px var(--accent-glow-strong);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.25);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-xl { padding: 18px 40px; font-size: 1.1rem; border-radius: 14px; }
.btn-full { width: 100%; margin-top: auto; }

/* ──────────────────────────────────────────
   NAVBAR
   ────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.navbar.scrolled {
  background: rgba(10,10,10,0.96);
  box-shadow: 0 4px 32px rgba(0,0,0,0.5);
}
.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-link {
  padding: 8px 14px;
  font-size: 0.9rem;
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--white-70);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--white); background: var(--white-15); }
.nav-cta-link {
  padding: 9px 20px;
  font-size: 0.9rem;
  font-family: var(--font-heading);
  font-weight: 600;
  color: #000;
  background: var(--accent);
  border-radius: 8px;
  transition: all 0.2s;
  margin-left: 8px;
}
.nav-cta-link:hover {
  background: #fff;
  box-shadow: 0 0 20px var(--accent-glow-strong);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ──────────────────────────────────────────
   HERO
   ────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20,241,149,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20,241,149,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}
.hero-glow {
  position: absolute;
  bottom: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 1;
  padding-top: 80px;
  padding-bottom: 100px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: 100px;
  padding: 8px 18px;
  font-size: 0.8rem;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 28px;
}
.badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 8px var(--accent); }
  50% { box-shadow: 0 0 16px var(--accent), 0 0 24px var(--accent-glow); }
}
.hero-headline {
  max-width: 800px;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  max-width: 620px;
  color: var(--white-70);
  margin-bottom: 40px;
  line-height: 1.7;
}
.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.social-proof-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--white-40);
  font-family: var(--font-heading);
  font-weight: 500;
}
.dot-green {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
  flex-shrink: 0;
}

/* ──────────────────────────────────────────
   PROBLEM SECTION
   ────────────────────────────────────────── */
.problem {
  padding: 100px 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: border-color 0.3s, transform 0.3s;
}
.pain-card:hover {
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-4px);
}
.pain-icon { font-size: 1.8rem; margin-bottom: 16px; }
.pain-card h3 { margin-bottom: 12px; font-size: 1.05rem; }
.pain-card p { font-size: 0.9rem; line-height: 1.65; }

/* ──────────────────────────────────────────
   PLAYBOOK / CHAPTERS
   ────────────────────────────────────────── */
.playbook { padding: 100px 0; }
.chapters-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.chapter-card {
  background: var(--bg-card);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background 0.2s;
  position: relative;
}
.chapter-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--accent);
  transition: height 0.3s ease;
}
.chapter-card:hover { background: var(--bg-card-hover); }
.chapter-card:hover::before { height: 100%; }
.chapter-num {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.chapter-card h3 { font-size: 1rem; font-weight: 600; }
.chapter-card p { font-size: 0.875rem; color: var(--white-70); line-height: 1.6; }

/* ──────────────────────────────────────────
   TESTIMONIALS
   ────────────────────────────────────────── */
.testimonials {
  padding: 100px 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}
.testimonial-card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 0 30px rgba(20, 241, 149, 0.08);
  transform: translateY(-4px);
}
.testimonial-stars { color: var(--accent); font-size: 0.9rem; letter-spacing: 2px; }
.testimonial-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--white-70);
  flex: 1;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.author-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--accent);
  font-size: 1rem;
  flex-shrink: 0;
}
.author-handle {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--white);
}
.author-tag {
  font-size: 0.78rem;
  color: var(--white-40);
  margin-top: 2px;
}

/* ──────────────────────────────────────────
   PRICING
   ────────────────────────────────────────── */
.pricing { padding: 100px 0; }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
  align-items: start;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
  position: relative;
}
.pricing-card:hover {
  border-color: rgba(255,255,255,0.15);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
  transform: translateY(-6px);
}
.pricing-featured {
  border-color: var(--border-accent);
  background: linear-gradient(160deg, #131a14 0%, var(--bg-card) 100%);
}
.pricing-featured:hover {
  border-color: var(--accent);
  box-shadow: 0 0 50px var(--accent-glow), 0 8px 40px rgba(0,0,0,0.5);
}
.pricing-badge {
  display: inline-block;
  background: var(--accent);
  color: #000;
  font-family: var(--font-heading);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 20px;
  width: fit-content;
}
.pricing-tier {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--white-40);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.pricing-price {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}
.pricing-freq {
  font-size: 1rem;
  font-weight: 400;
  color: var(--white-40);
  letter-spacing: 0;
}
.pricing-limit {
  font-size: 0.8rem;
  color: #f1a614;
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: 24px;
}
.pricing-features {
  margin: 24px 0 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--white-70);
  line-height: 1.5;
}
.check {
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ──────────────────────────────────────────
   FAQ
   ────────────────────────────────────────── */
.faq {
  padding: 100px 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
}
.faq-list {
  margin-top: 48px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.faq-item {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}
.faq-item:last-child { border-bottom: none; }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  background: none;
  border: none;
  color: var(--white);
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  gap: 16px;
  transition: background 0.2s, color 0.2s;
}
.faq-question:hover { background: var(--white-15); color: var(--accent); }
.faq-question[aria-expanded="true"] { color: var(--accent); }
.faq-icon {
  font-size: 1.4rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.3s ease;
  line-height: 1;
}
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s ease;
  padding: 0 28px;
}
.faq-answer.open {
  max-height: 300px;
  padding: 0 28px 24px;
}
.faq-answer p { font-size: 0.92rem; line-height: 1.7; }

/* ──────────────────────────────────────────
   FINAL CTA
   ────────────────────────────────────────── */
.final-cta {
  padding: 120px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.final-cta-inner {
  position: relative;
  z-index: 1;
}
.final-cta-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.final-cta-eyebrow {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.final-cta-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.final-cta-sub {
  max-width: 500px;
  margin: 0 auto 40px;
  font-size: 1.05rem;
  color: var(--white-70);
  line-height: 1.7;
}
.final-cta-note {
  margin-top: 20px;
  font-size: 0.82rem;
  color: var(--white-40);
  font-family: var(--font-heading);
}

/* ──────────────────────────────────────────
   FOOTER
   ────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  background: var(--bg);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.footer-logo { font-size: 1.1rem; }
.footer-legal {
  font-size: 0.78rem;
  color: var(--white-40);
  max-width: 550px;
  line-height: 1.6;
}
.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}
.footer-links a {
  font-size: 0.82rem;
  color: var(--white-40);
  font-family: var(--font-heading);
  font-weight: 500;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

/* ──────────────────────────────────────────
   MOBILE RESPONSIVE
   ────────────────────────────────────────── */
@media (max-width: 900px) {
  .pain-grid { grid-template-columns: 1fr; gap: 16px; }
  .testimonials-grid { grid-template-columns: 1fr; gap: 16px; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }
  .chapters-grid { grid-template-columns: 1fr; }
  .chapters-grid .chapter-card::before { width: 0; height: 3px; bottom: 0; top: auto; }
  .chapters-grid .chapter-card:hover::before { height: 3px; width: 100%; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(10,10,10,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav-link { padding: 12px 16px; }
  .nav-cta-link { margin: 8px 0 0; text-align: center; padding: 13px 20px; }
  .hero .container { padding-top: 48px; padding-bottom: 72px; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; text-align: center; }
  .problem, .playbook, .testimonials, .pricing, .faq, .final-cta { padding: 72px 0; }
  .section-sub { margin-bottom: 36px; }
}

@media (max-width: 480px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
  .pricing-price { font-size: 2rem; }
  .final-cta-title { font-size: 2.2rem; }
  .faq-question { font-size: 0.9rem; padding: 20px 20px; }
  .faq-answer { padding: 0 20px; }
  .faq-answer.open { padding: 0 20px 20px; }
  .chapter-card, .pain-card, .testimonial-card, .pricing-card { padding: 24px 20px; }
}