/* =========================================================
   site-04 — Neo-Brutalist Landing Page
   Nền chói (vàng chanh / trắng), border đen dày, shadow lệch cứng,
   typography uppercase cực to, marquee, bố cục bất đối xứng.
   ========================================================= */

:root {
  --yellow: #f5f52e;
  --white: #ffffff;
  --black: #000000;
  --red: #ff3b30;
  --green: #39ff14;
  --border-w: 4px;
  --shadow-off: 8px;
  --font-display: "Archivo Black", "Arial Black", sans-serif;
  --font-body: "Space Grotesk", "Arial", sans-serif;

  --buy-modal-accent: var(--black);
  --buy-modal-accent-text: var(--yellow);
  --buy-modal-bg: var(--white);
  --buy-modal-text: var(--black);
  --buy-modal-muted: #444444;
  --buy-modal-border: var(--black);
  --buy-modal-radius: 0;
  --buy-modal-font: "Space Grotesk", "Arial", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--white); color: var(--black); font-family: var(--font-body); font-weight: 500; overflow-x: hidden; }
img, svg { max-width: 100%; }
a { color: inherit; }

/* ---------- Marquee ---------- */
.marquee-bar { background: var(--black); color: var(--yellow); border-bottom: var(--border-w) solid var(--black); overflow: hidden; white-space: nowrap; padding: 10px 0; }
.marquee-track { display: inline-flex; gap: 40px; animation: marquee-scroll 18s linear infinite; font-family: var(--font-display); font-size: 16px; letter-spacing: 1px; text-transform: uppercase; }
.marquee-track span { display: inline-flex; align-items: center; gap: 40px; }

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* ---------- Header ---------- */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--white); border-bottom: var(--border-w) solid var(--black); }
.header-inner { max-width: 1200px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo-box { font-family: var(--font-display); font-size: 22px; text-decoration: none; background: var(--yellow); color: var(--black); border: var(--border-w) solid var(--black); padding: 6px 12px; box-shadow: 4px 4px 0 var(--black); transform: rotate(-2deg); }
.header-nav { display: flex; gap: 22px; font-weight: 700; text-transform: uppercase; font-size: 14px; }
.header-nav a { text-decoration: none; border-bottom: 3px solid transparent; padding-bottom: 2px; }
.header-nav a:hover { border-bottom-color: var(--black); }
.btn-header { padding: 10px 18px; font-size: 13px; }

/* ---------- Buttons ---------- */
.btn { display: inline-block; font-family: var(--font-display); text-transform: uppercase; text-decoration: none; border: var(--border-w) solid var(--black); padding: 14px 24px; cursor: pointer; background: var(--white); color: var(--black); box-shadow: var(--shadow-off) var(--shadow-off) 0 var(--black); transition: transform 0.1s ease, box-shadow 0.1s ease; font-size: 15px; }
.btn:hover { transform: translate(-2px, -2px); box-shadow: 10px 10px 0 var(--black); }
.btn:active { transform: translate(2px, 2px); box-shadow: 3px 3px 0 var(--black); }
.btn-primary { background: var(--green); color: var(--black); }
.btn-outline { background: var(--white); }
.btn-lg { padding: 18px 32px; font-size: 18px; }
.btn-block { display: block; width: 100%; text-align: center; }

/* ---------- Badges ---------- */
.badge { display: inline-block; font-family: var(--font-display); text-transform: uppercase; font-size: 13px; padding: 6px 14px; border: 3px solid var(--black); box-shadow: 4px 4px 0 var(--black); background: var(--white); }
.badge-red { background: var(--red); color: var(--white); }
.badge-green { background: var(--green); color: var(--black); }

/* ---------- Rotations (asymmetry) ---------- */
.rotate-pos { transform: rotate(2deg); }
.rotate-neg { transform: rotate(-3deg); }

/* ---------- Section titles ---------- */
.section-title { font-family: var(--font-display); text-transform: uppercase; font-size: clamp(32px, 6vw, 56px); line-height: 1.05; margin: 0 0 40px; padding: 0 24px; max-width: 1200px; margin-left: auto; margin-right: auto; }
.section-title-white { color: var(--white); }
.highlight-yellow { background: var(--yellow); color: var(--black); padding: 0 8px; box-shadow: 5px 5px 0 var(--black); display: inline-block; }
.highlight-green { background: var(--green); color: var(--black); padding: 0 8px; box-shadow: 5px 5px 0 var(--black); display: inline-block; }
.highlight-red { background: var(--red); color: var(--white); padding: 0 8px; box-shadow: 5px 5px 0 var(--black); display: inline-block; }

/* ---------- Hero ---------- */
.hero { background: var(--yellow); border-bottom: var(--border-w) solid var(--black); padding: 60px 24px 90px; }
.hero-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; }
.hero-title { font-family: var(--font-display); text-transform: uppercase; font-size: clamp(36px, 6.5vw, 72px); line-height: 1; margin: 18px 0 20px; }
.hero-tagline { font-size: clamp(16px, 2vw, 20px); font-weight: 700; max-width: 560px; margin: 0 0 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 18px; margin-bottom: 30px; }
.hero-price-tag { display: inline-block; background: var(--black); color: var(--yellow); font-family: var(--font-display); font-size: 16px; padding: 10px 18px; border: 3px solid var(--black); box-shadow: 5px 5px 0 var(--red); }

/* ---------- Hero mock ---------- */
.hero-mock { position: relative; min-height: 340px; }
.browser-mock { background: var(--white); border: var(--border-w) solid var(--black); box-shadow: var(--shadow-off) var(--shadow-off) 0 var(--black); width: 100%; max-width: 420px; }
.browser-bar { display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-bottom: var(--border-w) solid var(--black); background: var(--white); }
.browser-dot { width: 12px; height: 12px; background: var(--black); border: 2px solid var(--black); display: inline-block; }
.browser-url { margin-left: 10px; font-size: 12px; font-weight: 700; border: 2px solid var(--black); padding: 2px 8px; background: var(--yellow); }
.browser-body { padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.fake-row { display: flex; align-items: center; gap: 10px; }
.fake-avatar { width: 28px; height: 28px; border: 2px solid var(--black); background: var(--green); flex-shrink: 0; }
.fake-line { height: 14px; border: 2px solid var(--black); background: repeating-linear-gradient(45deg, var(--white), var(--white) 6px, #eee 6px, #eee 12px); }
.fake-line.w70 { width: 70%; }
.fake-line.w50 { width: 50%; }
.fake-line.w80 { width: 80%; }

.ext-popup { position: absolute; right: 0; bottom: -30px; width: 210px; background: var(--black); color: var(--white); border: var(--border-w) solid var(--black); box-shadow: var(--shadow-off) var(--shadow-off) 0 var(--red); padding: 14px; }
.ext-popup-head { font-family: var(--font-display); font-size: 13px; text-transform: uppercase; margin-bottom: 10px; color: var(--green); }
.ext-popup-row { display: flex; justify-content: space-between; font-size: 13px; font-weight: 700; margin-bottom: 8px; }
.ext-popup-bar { height: 10px; border: 2px solid var(--white); margin-bottom: 8px; background: transparent; }
.ext-popup-bar span { display: block; height: 100%; background: var(--green); }
.ext-popup-status { font-size: 11px; letter-spacing: 1px; text-transform: uppercase; color: var(--yellow); }

/* ---------- Features ---------- */
.features { padding: 70px 24px; max-width: 1200px; margin: 0 auto; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }
.feature-card { background: var(--white); border: var(--border-w) solid var(--black); box-shadow: var(--shadow-off) var(--shadow-off) 0 var(--black); padding: 22px; transition: transform 0.15s ease, box-shadow 0.15s ease; }
.feature-card:hover { transform: translate(-3px, -3px); box-shadow: 11px 11px 0 var(--black); }
.feature-card:nth-child(3n+1) { transform: rotate(-1.5deg); }
.feature-card:nth-child(3n+1):hover { transform: rotate(-1.5deg) translate(-3px, -3px); }
.feature-card:nth-child(3n+2) { transform: rotate(1deg); }
.feature-card:nth-child(3n+2):hover { transform: rotate(1deg) translate(-3px, -3px); }
.feature-icon { font-size: 34px; display: inline-block; margin-bottom: 12px; }
.feature-title { font-family: var(--font-display); text-transform: uppercase; font-size: 17px; margin: 0 0 10px; }
.feature-desc { font-size: 14px; line-height: 1.5; margin: 0; }

/* ---------- How it works ---------- */
.how { background: var(--black); padding: 70px 24px; }
.how-steps { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.how-step { background: var(--yellow); border: var(--border-w) solid var(--black); box-shadow: var(--shadow-off) var(--shadow-off) 0 var(--green); padding: 22px; position: relative; }
.how-step:nth-child(even) { transform: rotate(-1.5deg); }
.how-step:nth-child(odd) { transform: rotate(1.5deg); }
.how-step-num { font-family: var(--font-display); font-size: 40px; line-height: 1; margin-bottom: 10px; }
.how-step-title { font-family: var(--font-display); text-transform: uppercase; font-size: 16px; margin: 0 0 8px; }
.how-step-desc { font-size: 13px; line-height: 1.5; margin: 0; }

/* ---------- Use cases ---------- */
.usecases { padding: 70px 24px; max-width: 1200px; margin: 0 auto; }
.usecases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.usecase-card { background: var(--red); color: var(--white); border: var(--border-w) solid var(--black); box-shadow: var(--shadow-off) var(--shadow-off) 0 var(--black); padding: 20px; }
.usecase-card:nth-child(2n) { background: var(--white); color: var(--black); transform: rotate(-2deg); }
.usecase-card:nth-child(2n+1) { transform: rotate(1.5deg); }
.usecase-title { font-family: var(--font-display); text-transform: uppercase; font-size: 15px; margin: 0 0 10px; }
.usecase-desc { font-size: 13px; line-height: 1.5; margin: 0; }

/* ---------- Pricing ---------- */
.pricing { background: var(--green); border-top: var(--border-w) solid var(--black); border-bottom: var(--border-w) solid var(--black); padding: 80px 24px; display: flex; justify-content: center; }
.pricing-box { background: var(--white); border: var(--border-w) solid var(--black); box-shadow: 12px 12px 0 var(--black); padding: 40px; max-width: 460px; width: 100%; text-align: center; }
.pricing-name { font-family: var(--font-display); text-transform: uppercase; font-size: 24px; margin: 16px 0 10px; }
.pricing-price { font-family: var(--font-display); font-size: clamp(28px, 5vw, 42px); margin-bottom: 10px; }
.pricing-note { font-size: 14px; margin-bottom: 26px; }

/* ---------- FAQ ---------- */
.faq { padding: 70px 24px; max-width: 900px; margin: 0 auto; }
.faq-list { display: flex; flex-direction: column; gap: 18px; }
.faq-item { background: var(--white); border: var(--border-w) solid var(--black); box-shadow: 6px 6px 0 var(--black); }
.faq-question { width: 100%; text-align: left; background: var(--yellow); border: none; border-bottom: var(--border-w) solid var(--black); font-family: var(--font-display); text-transform: uppercase; font-size: 15px; padding: 16px 18px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.faq-question .faq-icon { font-size: 20px; flex-shrink: 0; }
.faq-answer { font-size: 14px; line-height: 1.6; padding: 0 18px; max-height: 0; overflow: hidden; transition: max-height 0.25s ease, padding 0.25s ease; }
.faq-item.open .faq-answer { padding: 16px 18px; max-height: 500px; }

/* ---------- CTA final ---------- */
.cta-final { background: var(--black); color: var(--white); padding: 80px 24px; text-align: center; }
.cta-final-inner { max-width: 800px; margin: 0 auto; }
.cta-final-title { font-family: var(--font-display); text-transform: uppercase; font-size: clamp(26px, 4.5vw, 40px); margin: 0 0 30px; color: var(--yellow); }
.contact-row { margin-top: 30px; display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }
.contact-row a { border: 3px solid var(--white); color: var(--white); text-decoration: none; padding: 10px 16px; font-weight: 700; font-size: 14px; }
.contact-row a:hover { background: var(--white); color: var(--black); }

/* ---------- Footer ---------- */
.site-footer { background: var(--white); border-top: var(--border-w) solid var(--black); padding: 30px 24px; text-align: center; }
.disclaimer { max-width: 800px; margin: 0 auto 16px; font-size: 12px; line-height: 1.6; color: #333; }
.footer-copy { font-size: 12px; font-weight: 700; margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-mock { min-height: 280px; margin-top: 20px; }
  .header-nav { display: none; }
}

@media (max-width: 600px) {
  .rotate-pos, .rotate-neg,
  .feature-card:nth-child(3n+1), .feature-card:nth-child(3n+2),
  .how-step:nth-child(even), .how-step:nth-child(odd),
  .usecase-card:nth-child(2n), .usecase-card:nth-child(2n+1),
  .logo-box, .pricing-box { transform: none; }

  .feature-card:hover,
  .feature-card:nth-child(3n+1):hover,
  .feature-card:nth-child(3n+2):hover { transform: translate(-2px, -2px); }

  .ext-popup { position: static; width: 100%; margin-top: 16px; }
  .header-inner { padding: 12px 16px; }
  .btn-lg { width: 100%; text-align: center; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; text-align: center; }
}