/* YelloPost AI — Premium dark + yellow */
:root {
  --bg: #0A0A0F;
  --surface: #13131F;
  --surface-2: #1B1B2C;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.18);
  --text: #FFFFFF;
  --text-2: rgba(255,255,255,0.72);
  --text-3: rgba(255,255,255,0.5);
  --text-4: rgba(255,255,255,0.32);
  --yellow: #F5C400;
  --yellow-light: #FFD23F;
  --yellow-dim: rgba(245,196,0,0.12);
  --green: #34D399;
  --red: #F87171;
  --font-display: 'Inter Tight', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --max: 1200px;
  --max-narrow: 880px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--text);
  font-family: var(--font-body); font-size: 16px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
}
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% -10%, rgba(245,196,0,.06), transparent 60%),
    radial-gradient(ellipse 80% 50% at 20% 110%, rgba(245,196,0,.04), transparent 60%);
}
body > * { position: relative; z-index: 1; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: var(--max-narrow); margin: 0 auto; padding: 0 24px; }

a { color: var(--text); text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

/* === HEADER === */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,15,.85); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-wrap {
  display: flex; align-items: center; gap: 40px;
  padding: 16px 24px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 800; font-size: 1.15rem;
  letter-spacing: -.01em; flex-shrink: 0;
}
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--yellow); color: #000;
  font-family: var(--font-display); font-weight: 900; font-size: 1.4rem;
  line-height: 1; padding-bottom: 2px;
}
.brand-text { letter-spacing: -.02em; }
.brand-dot { color: var(--yellow); margin: 0 1px; }
.brand-ai { color: var(--yellow); font-weight: 900; }
.primary-nav { display: flex; gap: 32px; flex: 1; }
.primary-nav a {
  color: var(--text-2); font-size: .94rem; font-weight: 500;
  transition: color .15s;
}
.primary-nav a:hover { color: var(--text); }
.nav-cta { flex-shrink: 0; }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  padding: 8px; flex-direction: column; gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; background: var(--text); border-radius: 1px;
}
.mobile-nav {
  position: fixed; inset: 64px 0 0 0; background: var(--bg);
  padding: 32px 24px; flex-direction: column; gap: 4px;
  display: none; z-index: 99;
}
body.mnav-open .mobile-nav { display: flex; }
.mobile-nav a {
  padding: 16px 4px; border-bottom: 1px solid var(--border);
  font-family: var(--font-display); font-weight: 600; font-size: 1.1rem;
}
.mobile-nav a.m-cta {
  background: var(--yellow); color: #000; border-radius: 8px;
  text-align: center; margin-top: 16px; border: none;
}

/* === BUTTONS === */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: .94rem;
  letter-spacing: -.005em; border: 1px solid transparent;
  transition: transform .15s, background .15s, border-color .15s;
  cursor: pointer; text-decoration: none;
}
.btn-yellow { background: var(--yellow); color: #000; }
.btn-yellow:hover { background: var(--yellow-light); transform: translateY(-1px); }
.btn-ghost {
  background: transparent; color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--text); background: rgba(255,255,255,.04); }
.btn-lg { padding: 16px 28px; font-size: 1rem; }

/* === SECTIONS === */
section { padding: 96px 0; }
@media (max-width: 768px) { section { padding: 64px 0; } }

/* === HERO === */
.hero {
  padding: 96px 0 80px;
  position: relative; overflow: hidden;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 16px; border-radius: 999px;
  background: var(--yellow-dim); border: 1px solid rgba(245,196,0,.25);
  color: var(--yellow); font-size: .78rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  margin-bottom: 28px;
}
.hero-eyebrow .pulse {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--yellow); animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .4; } }
.hero h1 {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2.6rem, 6.5vw, 5rem); line-height: 1.02;
  letter-spacing: -.035em; margin: 0 0 24px;
  max-width: 900px;
}
.hero h1 .y { color: var(--yellow); }
.hero p.lead {
  font-size: clamp(1.1rem, 1.8vw, 1.35rem); color: var(--text-2);
  line-height: 1.55; max-width: 640px; margin: 0 0 36px;
  font-weight: 400;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-trust {
  margin-top: 48px; display: flex; gap: 32px; flex-wrap: wrap;
  align-items: center; padding-top: 32px;
  border-top: 1px solid var(--border);
}
.hero-trust span {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--text-3); font-size: .85rem;
}
.hero-trust strong { color: var(--text-2); font-weight: 600; }
.hero-trust .checkmark {
  color: var(--green); font-weight: 700;
}

/* === Section headings === */
.section-eyebrow {
  display: inline-block; color: var(--yellow);
  font-family: var(--font-mono); font-size: .78rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.8rem, 3.6vw, 2.8rem); line-height: 1.1;
  letter-spacing: -.025em; margin: 0 0 16px;
  max-width: 720px;
}
.section-sub {
  color: var(--text-2); font-size: 1.08rem; line-height: 1.6;
  max-width: 640px; margin: 0 0 56px;
}

/* === FEATURE GRID === */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
@media (max-width: 900px) { .feature-grid { grid-template-columns: 1fr; } }
.feature-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px 28px;
  transition: border-color .2s, transform .2s;
}
.feature-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.feature-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border-radius: 10px;
  background: var(--yellow-dim); color: var(--yellow);
  margin-bottom: 22px;
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 {
  font-family: var(--font-display); font-weight: 700; font-size: 1.18rem;
  letter-spacing: -.015em; margin: 0 0 10px;
}
.feature-card p { color: var(--text-2); font-size: .96rem; margin: 0; line-height: 1.6; }

/* === STAT BLOCK === */
.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  padding: 56px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
@media (max-width: 768px) { .stats-row { grid-template-columns: repeat(2,1fr); gap: 32px; } }
.stat strong {
  display: block; font-family: var(--font-display); font-weight: 800;
  font-size: 2.6rem; letter-spacing: -.03em; color: var(--yellow); line-height: 1;
}
.stat span {
  display: block; color: var(--text-3); font-size: .85rem;
  letter-spacing: .04em; margin-top: 10px;
}

/* === STEP / PROCESS === */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px 24px; position: relative;
}
.step-num {
  font-family: var(--font-mono); font-size: .78rem; font-weight: 500;
  color: var(--yellow); letter-spacing: .12em; margin-bottom: 14px;
}
.step h4 {
  font-family: var(--font-display); font-size: 1.05rem; font-weight: 700;
  letter-spacing: -.01em; margin: 0 0 8px;
}
.step p { color: var(--text-2); font-size: .92rem; margin: 0; line-height: 1.55; }

/* === PRICING === */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
@media (max-width: 900px) { .pricing-grid { grid-template-columns: 1fr; } }
.pricing-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 36px 32px; position: relative;
  display: flex; flex-direction: column;
}
.pricing-card.featured {
  border-color: var(--yellow); background: linear-gradient(180deg, rgba(245,196,0,.05), transparent 40%);
}
.pricing-card.featured::before {
  content: "Most Popular"; position: absolute; top: -12px; left: 24px;
  background: var(--yellow); color: #000; padding: 5px 14px;
  border-radius: 100px; font-size: .72rem; font-weight: 700;
  letter-spacing: .04em;
}
.tier-name {
  font-family: var(--font-display); font-weight: 700; font-size: 1.1rem;
  letter-spacing: -.005em; margin: 0 0 8px;
}
.tier-desc { color: var(--text-3); font-size: .9rem; margin: 0 0 24px; line-height: 1.5; }
.tier-price {
  font-family: var(--font-display); font-weight: 800;
  font-size: 3rem; letter-spacing: -.03em; line-height: 1;
  display: flex; align-items: baseline; gap: 6px; margin-bottom: 6px;
}
.tier-price .dollar { font-size: 1.4rem; color: var(--text-2); }
.tier-price .unit { font-size: .9rem; color: var(--text-3); font-weight: 500; }
.tier-billed { color: var(--text-3); font-size: .82rem; margin: 0 0 28px; }
.tier-features { list-style: none; padding: 0; margin: 0 0 28px; flex: 1; }
.tier-features li {
  padding: 9px 0; border-bottom: 1px solid var(--border);
  color: var(--text-2); font-size: .92rem; display: flex; align-items: flex-start; gap: 10px;
}
.tier-features li::before {
  content: "✓"; color: var(--yellow); font-weight: 700; flex-shrink: 0;
}
.tier-features li.muted { color: var(--text-4); }
.tier-features li.muted::before { content: "—"; color: var(--text-4); }

/* === BIG CTA === */
.big-cta {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 24px; padding: 80px 48px; text-align: center;
}
.big-cta h2 {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -.025em;
  margin: 0 0 16px;
}
.big-cta h2 .y { color: var(--yellow); }
.big-cta p { color: var(--text-2); font-size: 1.1rem; max-width: 540px; margin: 0 auto 32px; }
.big-cta .btn { font-size: 1.05rem; padding: 16px 32px; }

/* === FORM === */
.form-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 36px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label {
  font-size: .78rem; font-weight: 600; color: var(--text-3);
  letter-spacing: .08em; text-transform: uppercase;
}
.field input, .field select, .field textarea {
  background: var(--bg); border: 1px solid var(--border-strong);
  border-radius: 10px; padding: 12px 14px;
  color: var(--text); font-family: inherit; font-size: .96rem;
  transition: border-color .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--yellow);
}
.field textarea { resize: vertical; min-height: 100px; }
.honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-foot { color: var(--text-4); font-size: .82rem; margin: 16px 0 0; text-align: center; }

/* === CONTENT BLOCK === */
.content-block { max-width: 760px; margin: 0 auto; }
.content-block h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.85rem; letter-spacing: -.02em;
  margin: 56px 0 14px;
}
.content-block h3 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.25rem; letter-spacing: -.01em;
  margin: 32px 0 10px;
}
.content-block p {
  color: var(--text-2); font-size: 1.06rem; line-height: 1.7; margin: 0 0 18px;
}
.content-block ul, .content-block ol {
  color: var(--text-2); font-size: 1.04rem; line-height: 1.75;
  padding-left: 24px; margin: 0 0 20px;
}
.content-block li { margin-bottom: 8px; }
.content-block strong { color: var(--text); font-weight: 600; }
.content-block a { color: var(--yellow); text-decoration: underline; text-underline-offset: 3px; }

/* === FOOTER === */
.site-footer { padding: 80px 0 32px; border-top: 1px solid var(--border); margin-top: 96px; }
.foot-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 56px;
  padding-bottom: 48px;
}
@media (max-width: 900px) { .foot-grid { grid-template-columns: 1fr 1fr; gap: 40px; } }
@media (max-width: 600px) { .foot-grid { grid-template-columns: 1fr; gap: 32px; } }
.foot-brand .foot-logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 800; font-size: 1.15rem;
  margin-bottom: 14px;
}
.foot-brand p { color: var(--text-3); font-size: .92rem; max-width: 360px; line-height: 1.6; margin: 0 0 16px; }
.foot-back { color: var(--text-2); font-size: .85rem; text-decoration: underline; text-underline-offset: 3px; }
.foot-back:hover { color: var(--yellow); }
.foot-col h5 {
  font-family: var(--font-mono); font-size: .74rem; font-weight: 500;
  color: var(--text-4); letter-spacing: .14em; text-transform: uppercase;
  margin: 0 0 16px;
}
.foot-col a {
  display: block; padding: 6px 0; color: var(--text-2); font-size: .92rem;
  transition: color .15s;
}
.foot-col a:hover { color: var(--yellow); }
.foot-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
  gap: 16px; padding-top: 24px; border-top: 1px solid var(--border);
  color: var(--text-4); font-size: .82rem;
}
.foot-links { display: flex; gap: 18px; }
.foot-links a { color: var(--text-3); font-size: .82rem; }
.foot-links a:hover { color: var(--yellow); }

/* === Responsive nav === */
@media (max-width: 900px) {
  .primary-nav, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
}

/* === Case study block === */
.case-hero {
  background: linear-gradient(135deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: 20px;
  padding: 48px; margin-bottom: 56px;
}
.case-hero .case-tag {
  display: inline-block; background: var(--yellow); color: #000;
  font-family: var(--font-mono); font-size: .74rem; font-weight: 500;
  padding: 5px 12px; border-radius: 100px; letter-spacing: .04em;
  margin-bottom: 18px;
}
.case-hero h2 {
  font-family: var(--font-display); font-weight: 800;
  font-size: 2.2rem; letter-spacing: -.02em; margin: 0 0 14px;
}
.case-hero p { color: var(--text-2); font-size: 1.08rem; max-width: 600px; margin: 0 0 24px; }
.case-stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-top: 32px; padding-top: 32px; border-top: 1px solid var(--border); }
@media (max-width: 600px) { .case-stats { grid-template-columns: 1fr; } }
.case-stats .stat strong { font-size: 2rem; }

/* === VERTICAL CARDS === */
.vertical-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
@media (max-width: 700px) { .vertical-grid { grid-template-columns: 1fr; } }
.vertical-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px 26px;
  display: flex; flex-direction: column; gap: 8px;
}
.vertical-card h3 {
  font-family: var(--font-display); font-weight: 700; font-size: 1.1rem;
  letter-spacing: -.01em; margin: 0; display: flex; align-items: center; gap: 10px;
}
.vertical-card h3 .v-icon { color: var(--yellow); font-size: 1.3rem; line-height: 1; }
.vertical-card p { color: var(--text-2); font-size: .94rem; margin: 4px 0 0; }
.vertical-card ul { color: var(--text-3); font-size: .88rem; margin: 8px 0 0; padding-left: 18px; }
.vertical-card ul li { margin-bottom: 4px; }