@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0A070F; --surface: #110820; --surface2: #140A25;
  --accent: #C026D3; --accent-hover: #A21CAF; --accent-glow: rgba(192,38,211,0.3);
  --accent2: #EC4899; --accent3: #7C3AED;
  --text: #F0F5FF; --muted: #7A5A8A; --muted2: #A98FBB;
  --border: rgba(255,255,255,0.07); --border-accent: rgba(192,38,211,0.4);
  --green: #22C55E; --radius: 10px; --radius-lg: 16px;
}
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: 'Inter', sans-serif; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
h1,h2,h3,h4 { line-height: 1.15; letter-spacing: -0.03em; }
p { color: var(--muted2); line-height: 1.75; }

/* NAV */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(7,9,15,0.9); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); height: 72px; }
.nav-inner { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.nav-logo { font-size: 1.3rem; font-weight: 900; letter-spacing: -0.05em; color: var(--text); flex-shrink: 0; }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 1rem; }
.nav-links a { font-size: 0.82rem; font-weight: 500; color: var(--muted2); transition: color 0.2s; white-space: nowrap; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-right { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }

/* LANG DROPDOWN */
.lang-dropdown { position: relative; }
.lang-trigger {
  display: flex; align-items: center; gap: 0.45rem;
  background: var(--surface); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px; padding: 0.42rem 0.85rem;
  color: var(--text); font-family: inherit; font-size: 0.82rem; font-weight: 600;
  cursor: pointer; transition: border-color 0.2s, background 0.2s;
  white-space: nowrap;
}
.lang-trigger:hover { border-color: var(--accent); background: rgba(192,38,211,0.08); }
.lang-trigger svg { width: 12px; height: 12px; fill: var(--muted2); transition: transform 0.2s; flex-shrink: 0; }
.lang-dropdown.open .lang-trigger { border-color: var(--accent); }
.lang-dropdown.open .lang-trigger svg { transform: rotate(180deg); }
.lang-options {
  display: none; position: absolute; top: calc(100% + 8px); right: 0;
  background: var(--surface); border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px; padding: 0.35rem; min-width: 155px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.6); z-index: 9999;
  animation: fadeDown 0.15s ease;
  flex-direction: column;
}
.lang-dropdown.open .lang-options { display: flex; }
@keyframes fadeDown { from { opacity:0; transform:translateY(-6px); } to { opacity:1; transform:none; } }
.lang-option {
  display: flex; align-items: center; gap: 0.65rem; width: 100%;
  background: none; border: none; padding: 0.6rem 0.85rem; border-radius: 7px;
  color: var(--muted2); font-family: inherit; font-size: 0.85rem; font-weight: 500;
  cursor: pointer; transition: background 0.15s, color 0.15s; text-align: left;
}
.lang-option:hover { background: rgba(255,255,255,0.06); color: var(--text); }
.lang-option.active { color: var(--text); font-weight: 700; }
.lang-option.active::after { content: '✓'; margin-left:auto; color: var(--accent); font-size: 0.8rem; }
.lang-option .flag { font-size: 1rem; }

.btn-nav { background: linear-gradient(135deg, #EC4899, #C026D3); color: #fff !important; padding: 0.5rem 1.1rem; border-radius: var(--radius); font-weight: 600; font-size: 0.85rem; transition: background 0.2s, transform 0.2s; white-space: nowrap; }
.btn-nav:hover { background: linear-gradient(135deg, #DB2777, #A21CAF) !important; transform: translateY(-1px); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.3s; }
.mobile-menu { display: none; position: fixed; top: 62px; left: 0; right: 0; bottom: 0; background: var(--bg); z-index: 99; padding: 2rem 1.5rem; flex-direction: column; gap: 1.25rem; overflow-y: auto; }
.mobile-menu.open { display: flex; }
.mobile-menu a { font-size: 1.1rem; font-weight: 600; color: var(--text); padding: 0.65rem 0; border-bottom: 1px solid var(--border); }
.mobile-lang { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.5rem; padding-bottom:1rem; border-bottom:1px solid var(--border); }
.lang-btn { background: none; border: 1px solid var(--border); cursor: pointer; font-size: 0.82rem; font-weight: 700; color: var(--muted2); padding: 0.4rem 0.8rem; border-radius: 7px; transition: all 0.15s; font-family: inherit; }
.lang-btn:hover { color: var(--text); border-color: var(--accent); }
.lang-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* LAYOUT */
section { padding: 6rem 0; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }
.divider { height: 1px; background: var(--border); }
.section-tag { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 0.85rem; display: block; }
.section-title { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 1rem; color: var(--text); }
.section-sub { color: var(--muted2); font-size: 1.05rem; max-width: 600px; line-height: 1.75; margin-bottom: 3rem; }

/* PAGE HEADER */
.page-header { padding: 9rem 0 5rem; border-bottom: 1px solid var(--border); }
.page-header .badge { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
.page-header h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 900; letter-spacing: -0.04em; line-height: 1.1; margin-bottom: 1rem; color: var(--text); }
.page-header p { font-size: 1.1rem; max-width: 600px; }

/* BUTTONS */
.btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; background: linear-gradient(135deg, #EC4899, #C026D3, #7C3AED); color: #fff; padding: 0.9rem 2rem; border-radius: var(--radius); font-size: 1rem; font-weight: 700; transition: all 0.2s; box-shadow: 0 6px 28px rgba(192,38,211,0.35); }
.btn-primary:hover { background: linear-gradient(135deg, #DB2777, #A21CAF, #6D28D9); transform: translateY(-2px); box-shadow: 0 10px 36px rgba(192,38,211,0.45); }
.btn-secondary { display: inline-flex; align-items: center; gap: 0.5rem; background: transparent; color: var(--text); padding: 0.9rem 2rem; border-radius: var(--radius); font-size: 1rem; font-weight: 600; border: 1.5px solid var(--border); transition: all 0.2s; }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* CARDS */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 2rem; transition: border-color 0.25s, transform 0.25s; }
.card:hover { border-color: var(--border-accent); transform: translateY(-3px); }
.card-icon { font-size: 1.6rem; margin-bottom: 1rem; }
.card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 0.5rem; }
.card p { font-size: 0.88rem; line-height: 1.65; }

/* FEATURE CARD */
.feature-card { background: var(--surface); border: 1px solid var(--border-accent); border-radius: var(--radius-lg); padding: 2rem; }
.feature-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 1.25rem; }
.check-list { list-style: none; display: flex; flex-direction: column; gap: 0.75rem; }
.check-list li { font-size: 0.9rem; color: var(--muted2); display: flex; gap: 0.75rem; align-items: flex-start; }
.check-list li::before { content: '✓'; color: var(--green); flex-shrink: 0; font-weight: 700; }

/* GRIDS */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; margin-bottom: 2rem; }
.two-col h2 { font-size: 1.8rem; font-weight: 800; color: var(--text); margin-bottom: 1rem; }

/* STEPS */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); }
.step-item { position: relative; padding: 2.5rem 2rem; background: var(--surface); border: 1px solid var(--border); }
.step-item:not(:last-child) { border-right: none; }
.step-item:first-child { border-radius: var(--radius-lg) 0 0 var(--radius-lg); }
.step-item:last-child { border-radius: 0 var(--radius-lg) var(--radius-lg) 0; border-right: 1px solid var(--border); }
.step-num { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 0.5rem; }
.step-phase { font-size: 1.1rem; font-weight: 800; color: var(--text); margin-bottom: 0.75rem; }
.step-item p { font-size: 0.9rem; line-height: 1.65; }
.step-arrow { position: absolute; right: -16px; top: 50%; transform: translateY(-50%); z-index: 2; background: var(--bg); border: 1px solid var(--border); width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; color: var(--accent); }

/* DIFF */
.diff-row { display: grid; grid-template-columns: 1fr auto 1fr; }
.diff-col { background: var(--surface); border: 1px solid var(--border); padding: 2rem; }
.diff-col.old { border-radius: var(--radius-lg) 0 0 var(--radius-lg); border-right: none; }
.diff-col.new { border-radius: 0 var(--radius-lg) var(--radius-lg) 0; border-left: none; border-color: var(--border-accent); background: rgba(192,38,211,0.04); }
.diff-col h4 { font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 1.25rem; }
.diff-col.old h4 { color: var(--muted); }
.diff-col.new h4 { color: var(--accent); }
.diff-separator { display: flex; align-items: center; justify-content: center; background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 0 0.75rem; color: var(--accent); }
.diff-list { list-style: none; display: flex; flex-direction: column; gap: 0.65rem; }
.diff-list li { font-size: 0.88rem; display: flex; align-items: center; gap: 0.6rem; }
.diff-list.old-list li { color: var(--muted2); }
.diff-list.old-list li .arrow { color: var(--muted); }
.diff-list.new-list li { color: var(--text); font-weight: 500; }
.diff-list.new-list li .arrow { color: var(--green); }
.diff-footer { font-size: 0.8rem; color: var(--muted); margin-top: 1.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border); }

/* TABLE */
.comp-table { width: 100%; border-collapse: collapse; }
.comp-table th, .comp-table td { padding: 0.9rem 1.25rem; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
.comp-table th { background: var(--surface); font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.comp-table th.akira { color: var(--accent); }
.comp-table tr:hover td { background: rgba(255,255,255,0.02); }
.yes { color: var(--green); font-weight: 700; }
.no { color: var(--muted); }
.yes-bold { color: var(--accent); font-weight: 700; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--border); padding: 1.5rem 0; }
.faq-question { display: flex; justify-content: space-between; align-items: center; cursor: pointer; gap: 1rem; font-size: 1rem; font-weight: 600; color: var(--text); user-select: none; }
.faq-question::after { content: '+'; font-size: 1.4rem; font-weight: 400; color: var(--accent); flex-shrink: 0; transition: transform 0.25s; }
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.25s; font-size: 0.95rem; line-height: 1.75; }
.faq-item.open .faq-answer { max-height: 400px; padding-top: 1rem; }

/* USE CASE */
.usecase { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.75rem; transition: border-color 0.25s, transform 0.25s; }
.usecase:hover { border-color: var(--border-accent); transform: translateY(-3px); }
.usecase-role { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 0.5rem; }
.usecase h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 0.5rem; }
.usecase p { font-size: 0.86rem; line-height: 1.6; }

/* QUOTE */
.big-quote { font-size: clamp(1.1rem, 2.8vw, 1.8rem); font-weight: 800; line-height: 1.35; letter-spacing: -0.03em; color: var(--text); border-left: 3px solid var(--accent); padding-left: 1.5rem; margin: 3rem 0; }

/* CTA BANNER */
.cta-banner { background: var(--surface); border: 1px solid var(--border-accent); border-radius: var(--radius-lg); padding: 5rem 2.5rem; text-align: center; background-image: radial-gradient(ellipse at center, rgba(192,38,211,0.08) 0%, transparent 65%); }
.cta-banner h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; letter-spacing: -0.03em; margin-bottom: 1rem; color: var(--text); }
.cta-banner p { max-width: 500px; margin: 0 auto 2.25rem; }

/* FORM */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 0.4rem; color: var(--text); }
.form-group input, .form-group textarea, .form-group select { width: 100%; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 0.8rem 1rem; color: var(--text); font-family: inherit; font-size: 0.95rem; transition: border-color 0.2s; outline: none; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 120px; }

/* FOOTER */
footer { border-top: 1px solid var(--border); padding: 2.5rem 0; text-align: center; }
footer p { font-size: 0.82rem; }
.footer-links { display: flex; gap: 1.5rem; justify-content: center; flex-wrap: wrap; margin-top: 1rem; }
.footer-links a { color: var(--muted); font-size: 0.82rem; transition: color 0.2s; }
.footer-links a:hover { color: var(--text); }

/* REVEAL */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 820px) {
  .nav-links { display: none; }
  .btn-nav { display: none; }
  .lang-switcher { display: flex; }
  .hamburger { display: flex; }
  .two-col { grid-template-columns: 1fr; gap: 2rem; }
  .steps { grid-template-columns: 1fr; }
  .step-item:first-child { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  .step-item:last-child { border-radius: 0 0 var(--radius-lg) var(--radius-lg); border-right: 1px solid var(--border); border-top: none; }
  .step-item:not(:last-child) { border-right: 1px solid var(--border); border-bottom: none; }
  .step-arrow { display: none; }
  .diff-row { grid-template-columns: 1fr; }
  .diff-col.old { border-radius: var(--radius-lg) var(--radius-lg) 0 0; border-right: 1px solid var(--border); border-bottom: none; }
  .diff-col.new { border-radius: 0 0 var(--radius-lg) var(--radius-lg); border-left: 1px solid var(--border-accent); border-top: none; }
  .diff-separator { display: none; }
  section { padding: 4rem 0; }
  .cta-banner { padding: 3rem 1.5rem; }
  .page-header { padding: 7rem 0 3rem; }
}