:root {
  --max: 1120px;
  --bg: #ffffff;
  --bg2: #fbfbfd;
  --text: #0f172a;
  --muted: #64748b;
  --border: rgba(15,23,42,.08);
  --shadow: 0 20px 60px rgba(2,6,23,.1);
  --accent: #7c3aed;
  --accent2: #9b8cff;
  --radius: 18px;
  --glow: 0 0 0 6px rgba(124,58,237,.09);
  --ease: cubic-bezier(.2, .8, .2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: var(--text);
  background: 
    radial-gradient(1100px 520px at 50% -60px, rgba(124, 58, 237, .14), transparent 62%),
    radial-gradient(900px 450px at 18% 115%, rgba(155, 140, 255, .12), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg2) 55%, var(--bg) 100%);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

/* ================= HEADER ================= */
header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15, 23, 42, .06);
  transition: box-shadow .25s var(--ease);
}

header.is-scrolled {
  box-shadow: 0 18px 60px rgba(2, 6, 23, .1);
}

.nav {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.logo {
  width: 44px;
  height: 44px;
  transform: rotate(45deg);
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: grid;
  place-items: center;
  box-shadow: 0 10px 30px rgba(124, 58, 237, .22);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}

.logo span {
  transform: rotate(-45deg);
  color: #fff;
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -.5px;
}

.brand:hover .logo {
  transform: rotate(45deg) translateY(-1px);
  box-shadow: 0 18px 44px rgba(124, 58, 237, .28);
}

.brand-title {
  font-weight: 900;
  line-height: 1.05;
}

.brand-sub {
  font-size: 12.5px;
  color: var(--muted);
}

/* Desktop nav */
nav.desktop {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

nav.desktop a {
  padding: 8px 10px;
  border-radius: 12px;
  color: rgba(15, 23, 42, .7);
  transition: background .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
  font-size: 14px;
  cursor: pointer;
}

nav.desktop a:hover {
  background: rgba(124, 58, 237, .06);
  box-shadow: 0 0 0 5px rgba(124, 58, 237, .06);
  color: var(--text);
}

nav.desktop a.active {
  background: rgba(124, 58, 237, .1);
  box-shadow: var(--glow);
  color: var(--text);
}

/* Mobile hamburger button */
.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, .1);
  background: rgba(255, 255, 255, .92);
  cursor: pointer;
  transition: .2s var(--ease);
  align-items: center;
  justify-content: center;
}

.hamburger:hover {
  border-color: rgba(124, 58, 237, .22);
  box-shadow: var(--glow);
}

.hamburger svg {
  width: 22px;
  height: 22px;
  color: rgba(15, 23, 42, .78);
}

/* ================= HERO / SECTIONS ================= */
.hero {
  padding: 86px 0 42px;
  text-align: center;
}

.hero h1 {
  font-size: 56px;
  line-height: 1.05;
  margin: 0 0 14px;
  letter-spacing: -1.2px;
}

.hero p {
  margin: 0 auto;
  max-width: 820px;
  font-size: 18.5px;
  line-height: 1.65;
  color: rgba(15, 23, 42, .72);
}

.hero .badges {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .8);
  border: 1px solid var(--border);
  font-size: 13.5px;
  color: rgba(15, 23, 42, .78);
  box-shadow: 0 10px 28px rgba(2, 6, 23, .05);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.badge:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 44px rgba(2, 6, 23, .08), var(--glow);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 0 4px rgba(124, 58, 237, .12);
}

section {
  padding: 74px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 26px;
}

.section-title h2 {
  margin: 0 0 10px;
  font-size: 32px;
  letter-spacing: -.6px;
}

.section-title p {
  margin: 0 auto;
  max-width: 860px;
  color: rgba(15, 23, 42, .7);
  line-height: 1.7;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.card {
  background: rgba(255, 255, 255, .86);
  border: 1px solid rgba(15, 23, 42, .08);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 18px 60px rgba(2, 6, 23, .06);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  inset: -2px;
  background: radial-gradient(500px 220px at 30% 20%, rgba(124, 58, 237, .16), transparent 60%);
  opacity: 0;
  transition: opacity .22s var(--ease);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(124, 58, 237, .2);
  box-shadow: var(--shadow), var(--glow);
}

.card:hover::after {
  opacity: 1;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  letter-spacing: -.3px;
}

.card p {
  margin: 0;
  color: rgba(15, 23, 42, .72);
  line-height: 1.65;
}

.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-12 { grid-column: span 12; }

.ico {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(124, 58, 237, .1);
  border: 1px solid rgba(124, 58, 237, .18);
  margin-bottom: 14px;
  box-shadow: 0 10px 26px rgba(124, 58, 237, .1);
}

.ico svg {
  width: 22px;
  height: 22px;
  display: block;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .9);
  border: 1px solid rgba(15, 23, 42, .1);
  font-size: 13.5px;
  color: rgba(15, 23, 42, .78);
  transition: .18s var(--ease);
}

.chip:hover {
  border-color: rgba(124, 58, 237, .22);
  box-shadow: var(--glow);
  transform: translateY(-1px);
}

/* Contact */
.contact-grid {
  align-items: stretch;
}

.email {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, .1);
  background: rgba(255, 255, 255, .9);
  transition: .2s var(--ease);
  font-size: 15px;
  min-height: 48px;
}

.email:hover {
  border-color: rgba(124, 58, 237, .2);
  box-shadow: var(--glow);
  transform: translateY(-1px);
}

.email small {
  color: rgba(15, 23, 42, .55);
}

/* Footer */
footer {
  border-top: 1px solid rgba(15, 23, 42, .08);
  padding: 28px 0;
  color: rgba(15, 23, 42, .62);
  font-size: 13.5px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.footer-links a {
  margin-left: 12px;
  padding: 6px 10px;
  border-radius: 10px;
  color: rgba(15, 23, 42, .68);
  transition: .2s var(--ease);
  cursor: pointer;
}

.footer-links a:hover {
  background: rgba(124, 58, 237, .06);
  box-shadow: 0 0 0 5px rgba(124, 58, 237, .06);
}

/* ================= MODALS ================= */
.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(2, 6, 23, .5);
  z-index: 999;
  padding: 18px;
}

.modal.show {
  display: flex;
}

.modal-panel {
  width: 100%;
  max-width: 1120px;
  max-height: 86vh;
  background: #fff;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 60px 160px rgba(2, 6, 23, .45);
  border: 1px solid rgba(255, 255, 255, .25);
}

.modal-head {
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  border-bottom: 1px solid rgba(15, 23, 42, .08);
  background: radial-gradient(900px 220px at 20% 0%, rgba(124, 58, 237, .14), transparent 60%), #fff;
}

.modal-head strong {
  font-size: 15px;
  letter-spacing: -.2px;
}

.modal-close {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(15, 23, 42, .1);
  background: rgba(255, 255, 255, .92);
  cursor: pointer;
  transition: .2s var(--ease);
}

.modal-close:hover {
  box-shadow: var(--glow);
  border-color: rgba(124, 58, 237, .2);
}

.modal-body {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 16px;
  padding: 16px;
}

/* TOC */
.toc {
  border: 1px solid rgba(15, 23, 42, .1);
  border-radius: 18px;
  background: rgba(255, 255, 255, .88);
  overflow: hidden;
  position: sticky;
  top: 16px;
  height: fit-content;
}

.toc-head {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(15, 23, 42, .08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-weight: 800;
  font-size: 13px;
  cursor: pointer;
  user-select: none;
}

.kbd {
  font-size: 11px;
  color: rgba(15, 23, 42, .58);
  border: 1px solid rgba(15, 23, 42, .1);
  padding: 4px 8px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .9);
  white-space: nowrap;
}

.toc-list {
  padding: 10px;
  max-height: calc(86vh - 120px);
  overflow: auto;
  transition: max-height .25s var(--ease);
}

.toc-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, .08);
  background: rgba(15, 23, 42, .02);
  margin-bottom: 8px;
  font-size: 13px;
  transition: .18s var(--ease);
  position: relative;
  overflow: hidden;
  min-height: 44px;
}

.toc-list a:hover {
  background: rgba(124, 58, 237, .06);
  border-color: rgba(124, 58, 237, .18);
  box-shadow: 0 0 0 5px rgba(124, 58, 237, .06);
}

.toc-list a.active {
  background: rgba(124, 58, 237, .1);
  border-color: rgba(124, 58, 237, .22);
  box-shadow: var(--glow);
}

.toc-list a.active::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
}

.toc-num {
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(15, 23, 42, .1);
  background: rgba(255, 255, 255, .9);
  color: rgba(15, 23, 42, .65);
  flex: 0 0 auto;
}

/* Legal */
.legal {
  border: 1px solid rgba(15, 23, 42, .1);
  border-radius: 18px;
  background: rgba(255, 255, 255, .92);
  overflow: hidden;
}

.legal-inner {
  padding: 14px 14px 18px;
  max-height: calc(86vh - 92px);
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.legal-search {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, .92);
  padding: 10px 0;
  z-index: 1;
  border-bottom: 1px solid rgba(15, 23, 42, .06);
  margin-bottom: 10px;
}

.legal-search input {
  width: 100%;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(15, 23, 42, .12);
  font-size: 14px;
  outline: none;
  transition: .18s var(--ease);
  background: #fff;
}

.legal-search input:focus {
  border-color: rgba(124, 58, 237, .35);
  box-shadow: var(--glow);
}

.legal h2 {
  margin: 2px 0 10px;
  font-size: 22px;
  letter-spacing: -.4px;
}

.legal .meta {
  color: rgba(15, 23, 42, .62);
  font-size: 13px;
  margin-bottom: 14px;
  line-height: 1.6;
}

.legal h3 {
  margin: 18px 0 8px;
  font-size: 15px;
  letter-spacing: -.2px;
}

.legal p,
.legal li {
  color: rgba(15, 23, 42, .78);
  line-height: 1.75;
  font-size: 14px;
}

.legal ul {
  margin: 10px 0 10px 18px;
}

.legal hr {
  border: none;
  border-top: 1px solid rgba(15, 23, 42, .08);
  margin: 16px 0;
}

.muted { color: rgba(15, 23, 42, .7); }
.center { text-align: center; }

/* ================= MOBILE MENU (DRAWER) ================= */
.drawer {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, .52);
  display: none;
  z-index: 998;
}

.drawer.show {
  display: block;
}

.drawer-panel {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: min(420px, 92vw);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-left: 1px solid rgba(15, 23, 42, .1);
  box-shadow: 0 40px 120px rgba(2, 6, 23, .35);
  transform: translateX(100%);
  transition: transform .28s var(--ease);
  display: flex;
  flex-direction: column;
}

.drawer.show .drawer-panel {
  transform: translateX(0);
}

.drawer-head {
  height: 74px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(15, 23, 42, .08);
}

.drawer-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: -.2px;
}

.drawer-body {
  padding: 14px;
  display: grid;
  gap: 10px;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
}

.drawer-link {
  padding: 14px;
  border-radius: 16px;
  border: 1px solid rgba(15, 23, 42, .1);
  background: rgba(255, 255, 255, .92);
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: .2s var(--ease);
  font-size: 15px;
  cursor: pointer;
}

.drawer-link:hover {
  border-color: rgba(124, 58, 237, .22);
  box-shadow: var(--glow);
  transform: translateY(-1px);
}

.drawer-link small {
  color: rgba(15, 23, 42, .55);
}

.drawer-foot {
  padding: 14px 16px;
  border-top: 1px solid rgba(15, 23, 42, .08);
  color: rgba(15, 23, 42, .62);
  font-size: 13px;
}

/* ================= RESPONSIVE BREAKPOINTS ================= */
@media (max-width: 980px) {
  .modal-body { grid-template-columns: 1fr; }
  .toc { position: relative; top: auto; }
}

@media (max-width: 820px) {
  nav.desktop { display: none; }
  .hamburger { display: flex; }
  .container { padding: 0 18px; }
  .hero { padding: 64px 0 28px; }
  .hero h1 { font-size: 38px; letter-spacing: -.8px; }
  .hero p { font-size: 16.8px; }
  section { padding: 56px 0; }
  .section-title h2 { font-size: 26px; }
  .grid { gap: 14px; }
  .span-4, .span-6, .span-12 { grid-column: span 12; }
  .badge { font-size: 12.8px; }
  .modal { padding: 0; }
  .modal-panel {
    max-width: 100%;
    max-height: 100vh;
    height: 100vh;
    border-radius: 0;
  }
  .modal-head { padding: 0 14px; }
  .legal-inner { max-height: calc(100vh - 62px - 16px); }
  .modal-body { padding: 12px; }
  .toc-list { max-height: 260px; }
  .toc.collapsed .toc-list { max-height: 0; padding: 0 10px; overflow: hidden; }
}

@media (max-width: 520px) {
  .brand-sub { display: none; }
  .hero h1 { font-size: 34px; }
  .email { font-size: 14.5px; }
  .footer-links a { margin-left: 6px; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb {
  background: rgba(15, 23, 42, .18);
  border-radius: 999px;
  border: 3px solid rgba(255, 255, 255, .9);
}