@import url('colors_and_type.css');

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--fg); }

.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }

/* ------- Header ------- */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(8,8,10,0.78); backdrop-filter: blur(20px); border-bottom: 1px solid var(--line-2); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 32px; max-width: 1240px; margin: 0 auto; }
.site-header__left { display: flex; align-items: center; gap: 40px; }
.brand img { height: 26px; display: block; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { font-size: 13.5px; color: var(--fg-2); text-decoration: none; border-bottom: none; transition: color 120ms; }
.nav-links a.on { color: var(--fg-1); }
.nav-links a:hover { color: var(--accent); }
.site-header__right { display: flex; align-items: center; gap: 18px; }
.ghost-link { font-size: 13.5px; color: var(--fg-2); cursor: pointer; }
.ghost-link:hover { color: var(--fg-1); }.strip { display: flex; gap: 18px; padding: 10px 32px; max-width: 1240px; margin: 0 auto; font-family: var(--font-mono); font-size: 10.5px; color: var(--fg-3); letter-spacing: 0.14em; text-transform: uppercase; border-top: 1px solid var(--line-1); }
.strip .dot { color: var(--accent); margin-right: 4px; }
.strip .sep { color: var(--fg-4); }

/* ------- Buttons ------- */
.btn { font-family: var(--font-sans); font-weight: 500; font-size: 14px; line-height: 1; padding: 12px 18px; border-radius: 4px; border: 1px solid transparent; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; transition: all 200ms cubic-bezier(0.22,1,0.36,1); }
.btn .arr { font-family: var(--font-mono); font-weight: 400; transition: transform 200ms; }
.btn:hover .arr { transform: translateX(3px); }
.btn-primary { background: var(--accent); color: var(--ink-0); }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 0 1px rgba(226, 6, 28,0.5), 0 0 32px rgba(226, 6, 28,0.25); }
.btn-primary:active { background: var(--accent-press); transform: translateY(1px); }
.btn-secondary { background: transparent; color: var(--fg-1); border-color: var(--line-3); }
.btn-secondary:hover { border-color: var(--line-red); color: var(--accent); }
.btn-ghost { background: transparent; color: var(--fg-2); }
.btn-ghost:hover { color: var(--fg-1); }
.btn-sm { padding: 9px 14px; font-size: 13px; }
.btn-lg { padding: 16px 24px; font-size: 15px; }

/* ------- Hero ------- */
.hero { position: relative; padding: 96px 32px 120px; max-width: 1240px; margin: 0 auto; overflow: hidden; }
.hero__mark { position: absolute; right: -120px; top: -60px; width: 640px; opacity: 0.06; pointer-events: none; }
.hero__mark img { width: 100%; animation: spin 60s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.hero__inner { position: relative; max-width: 880px; }
.hero__h { font-family: var(--font-display); font-weight: 700; font-size: clamp(48px, 7vw, 96px); line-height: 0.95; letter-spacing: -0.02em; margin: 24px 0 28px; color: var(--fg-1); }
.hero__h .red { color: var(--accent); }
.hero__lead { font-size: 19px; line-height: 1.55; color: var(--fg-2); max-width: 640px; margin: 0 0 36px; }
.hero__ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__meta { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--line-2); font-family: var(--font-mono); font-size: 12px; color: var(--fg-3); letter-spacing: 0.04em; }
.hero__meta b { color: var(--fg-1); font-weight: 600; }
.hero__meta .sep { color: var(--fg-4); }

/* ------- Section ------- */
.section { padding: 96px 32px; max-width: 1240px; margin: 0 auto; border-top: 1px solid var(--line-2); }
.section--alt { background: var(--ink-950); max-width: none; padding-left: 32px; padding-right: 32px; border-top: 1px solid var(--line-2); }
.section--alt > * { max-width: 1240px; margin-left: auto; margin-right: auto; }
.section__head { max-width: 720px; margin-bottom: 56px; display: flex; flex-direction: column; gap: 14px; }
.section__h { font-family: var(--font-display); font-weight: 600; font-size: clamp(32px, 4.2vw, 52px); line-height: 1.05; letter-spacing: -0.015em; color: var(--fg-1); margin: 0; }
.section__lead { font-size: 17px; line-height: 1.5; color: var(--fg-2); margin: 0; max-width: 560px; }

/* ------- Method ------- */
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-2); border: 1px solid var(--line-2); }
.phase { background: var(--ink-900); padding: 32px 28px; display: flex; flex-direction: column; gap: 14px; }
.phase__top { display: flex; justify-content: space-between; align-items: baseline; }
.phase__n { font-family: var(--font-display); font-weight: 700; font-size: 44px; color: var(--accent); letter-spacing: -0.02em; line-height: 1; }
.phase__tag { font-family: var(--font-mono); font-size: 10px; color: var(--fg-3); letter-spacing: 0.16em; text-transform: uppercase; }
.phase__h { font-family: var(--font-display); font-weight: 600; font-size: 28px; line-height: 1.15; letter-spacing: -0.01em; margin: 0; color: var(--fg-1); }
.phase__b { font-size: 14.5px; line-height: 1.55; color: var(--fg-2); margin: 0; }

/* ------- Cases ------- */
.cases { display: grid; grid-template-columns: 1fr; gap: 16px; }
.case { background: var(--ink-800); border: 1px solid var(--line-2); border-radius: 8px; padding: 40px; cursor: pointer; transition: all 200ms cubic-bezier(0.22,1,0.36,1); display: grid; grid-template-columns: 1fr 1fr; column-gap: 56px; row-gap: 18px; align-items: start; }
.case:hover { border-color: var(--line-3); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.45); }
.case__top { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: baseline; }
.case__n { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); }
.case__tag { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; color: var(--fg-3); }
.case__h { grid-column: 1 / -1; font-family: var(--font-display); font-weight: 600; font-size: clamp(22px, 2.4vw, 32px); line-height: 1.15; letter-spacing: -0.01em; margin: 0; color: var(--fg-1); }
.case__b { font-size: 14px; line-height: 1.6; color: var(--fg-3); margin: 0; }
.case__stats { grid-column: 1 / -1; display: flex; gap: 40px; flex-wrap: wrap; padding-top: 20px; border-top: 1px solid var(--line-1); }
.case__stat { display: flex; flex-direction: column; gap: 4px; }
.case__num { font-family: var(--font-display); font-weight: 700; font-size: 40px; color: var(--accent); letter-spacing: -0.02em; line-height: 1; }
.case__lbl { font-family: var(--font-mono); font-size: 10.5px; color: var(--fg-3); letter-spacing: 0.08em; text-transform: uppercase; }
.case__more { grid-column: 1 / -1; font-family: var(--font-mono); font-size: 11px; color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; }

/* ------- Stack ------- */
.stack-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stack-col__h { font-family: var(--font-display); font-weight: 600; font-size: 18px; color: var(--fg-1); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--line-2); }
.stack-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.stack-col li { font-family: var(--font-mono); font-size: 13px; color: var(--fg-2); }
.stack-col li::before { content: "→ "; color: var(--accent); margin-right: 6px; }
.stack-col--no .stack-col__h { color: var(--fg-3); border-bottom-color: var(--line-2); }
.stack-col--no li { color: var(--fg-4); text-decoration: line-through; text-decoration-color: var(--fg-4); }
.stack-col--no li::before { content: "✕ "; color: var(--fg-4); text-decoration: none; }

/* ------- Discovery ------- */
.discovery { background: var(--ink-800); border: 1px solid var(--line-2); border-top: 2px solid var(--accent); border-radius: 0 0 8px 8px; padding: 40px 36px; max-width: 720px; margin: 0 auto; }
.discovery__h { font-family: var(--font-display); font-weight: 600; font-size: 36px; line-height: 1.05; letter-spacing: -0.015em; color: var(--fg-1); margin: 14px 0 12px; }
.discovery__b { font-size: 15px; line-height: 1.55; color: var(--fg-2); margin: 0 0 28px; }
.discovery__form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg-3); }
.field input, .field select, .field textarea { font-family: var(--font-sans); font-size: 14px; padding: 12px 14px; background: var(--ink-900); border: 1px solid var(--line-2); border-radius: 6px; color: var(--fg-1); outline: none; transition: all 200ms; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(226, 6, 28,0.18); }
.discovery__cta { grid-column: 1 / -1; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 6px; }
.discovery--done .discovery__h { color: var(--fg-1); }
.discovery__meta { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line-2); color: var(--fg-3); }

/* ------- Footer ------- */
.site-footer { border-top: 1px solid var(--line-2); padding: 64px 32px 24px; max-width: 1240px; margin: 0 auto; }
.site-footer__top { display: grid; grid-template-columns: 1.4fr 2fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid var(--line-2); }
.site-footer__brand img { height: 38px; margin-bottom: 16px; }
.site-footer__brand p { font-size: 13.5px; color: var(--fg-3); line-height: 1.5; max-width: 320px; margin: 0; }
.site-footer__cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; justify-items: end; text-align: right; }
.site-footer__cols .ft-h { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--fg-3); margin-bottom: 14px; }
.site-footer__cols a { display: block; font-size: 13px; color: var(--fg-2); border-bottom: none; padding: 4px 0; }
.site-footer__cols a:hover { color: var(--accent); }
.site-footer__bot { display: flex; justify-content: space-between; align-items: center; padding-top: 18px; font-size: 12px; color: var(--fg-3); }

/* ------- Hamburger ------- */
.hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 36px; height: 36px; background: none; border: none; cursor: pointer; padding: 6px; flex-shrink: 0; }
.hamburger span { display: block; height: 2px; background: var(--fg-2); border-radius: 1px; transition: background 200ms; }
.hamburger:hover span { background: var(--fg-1); }

/* ------- Mobile Nav ------- */
.mobile-nav { display: flex; flex-direction: column; padding: 8px 20px 20px; background: rgba(8,8,10,0.97); border-top: 1px solid var(--line-2); }
.mobile-nav a { font-size: 17px; color: var(--fg-2); text-decoration: none; padding: 14px 0; border-bottom: 1px solid var(--line-1); transition: color 120ms; }
.mobile-nav a.on, .mobile-nav a:hover { color: var(--accent); }
.mobile-nav .btn { margin-top: 16px; width: 100%; justify-content: center; }

/* ------- Responsive: Tablet (≤ 880px) ------- */
@media (max-width: 880px) {
  .nav-links, .strip { display: none; }
  .hero__mark { display: none; }
  .hamburger { display: flex; }
  .header-cta { display: none; }

  .site-header__inner { padding: 12px 20px; }

  .hero { padding: 64px 20px 80px; }
  .hero__lead { font-size: 17px; }

  .section { padding: 64px 20px; }
  .section--alt { padding-left: 20px; padding-right: 20px; }

  .method-grid { grid-template-columns: 1fr; }
  .case { grid-template-columns: 1fr; padding: 28px 24px; }
  .case__top, .case__h, .case__stats, .case__more { grid-column: 1; }
  .stack-grid { grid-template-columns: repeat(2, 1fr); }

  .discovery { padding: 28px 24px; }
  .discovery__form { grid-template-columns: 1fr; }

  .site-footer { padding: 48px 20px 20px; }
  .site-footer__top { grid-template-columns: 1fr; gap: 32px; }
  .site-footer__bot { flex-direction: column; gap: 8px; align-items: flex-start; }
}

/* ------- Responsive: Mobile (≤ 480px) ------- */
@media (max-width: 480px) {
  .site-header__inner { padding: 10px 16px; }

  .hero { padding: 48px 16px 64px; }
  .hero__ctas { flex-direction: column; }
  .hero__ctas .btn { width: 100%; justify-content: center; }
  .hero__meta { gap: 10px; font-size: 11px; }
  .hero__meta .sep { display: none; }

  .section { padding: 48px 16px; }
  .section--alt { padding-left: 16px; padding-right: 16px; }

  .stack-grid { grid-template-columns: 1fr; }

  .phase { padding: 24px 20px; }
  .case { padding: 20px; }

  .discovery { padding: 24px 16px; }
  .discovery__h { font-size: 28px; }

  .site-footer { padding: 40px 16px 16px; }

  .mobile-nav { padding: 8px 16px 20px; }
  .mobile-nav a { font-size: 16px; }
}