:root {
  --paper: #f7f1e7;
  --ink: #23211e;
  --muted: #71695e;
  --line: #d8cbb9;
  --red: #9c4038;
  --blue: #315c68;
  --white: #fffdf8;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 8%, rgba(156, 64, 56, .11), transparent 25rem),
    radial-gradient(circle at 92% 90%, rgba(49, 92, 104, .12), transparent 28rem),
    var(--paper);
  font-family: "Songti SC", "Noto Serif CJK SC", Georgia, serif;
  line-height: 1.75;
}

.ink-haze {
  position: fixed;
  z-index: -1;
  border-radius: 45% 55% 65% 35%;
  background: rgba(35, 33, 30, .08);
  filter: blur(25px);
  animation: ink-breathe 9s ease-in-out infinite alternate;
}

.ink-haze-one { top: 9%; left: -100px; width: 320px; height: 180px; }
.ink-haze-two { right: -80px; bottom: 6%; width: 280px; height: 230px; animation-delay: -4s; }

.page-back {
  position: fixed;
  top: max(20px, env(safe-area-inset-top));
  left: max(22px, env(safe-area-inset-left));
  z-index: 3;
  color: var(--blue);
  text-decoration: none;
  font: 750 13px/1.2 ui-sans-serif, system-ui, sans-serif;
}

.account-shell {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(360px, .72fr);
  width: min(980px, calc(100% - 40px));
  min-height: calc(100vh - 140px);
  margin: 0 auto;
  padding: 100px 0 50px;
  align-items: center;
}

.literary-panel { padding: 46px 64px 46px 12px; }
.eyebrow { margin: 0; color: var(--red); font: 800 12px/1 ui-sans-serif, system-ui, sans-serif; letter-spacing: .16em; text-transform: uppercase; }
h1 { max-width: 520px; margin: 16px 0 20px; font-size: clamp(42px, 6vw, 72px); line-height: 1.08; letter-spacing: -.045em; }
.lead { max-width: 510px; margin: 0; color: var(--muted); font-size: 17px; }
blockquote { margin: 38px 0; padding-left: 20px; border-left: 2px solid var(--red); color: var(--blue); font-size: 23px; line-height: 1.7; }
blockquote span { display: block; }
.account-benefits { display: flex; flex-wrap: wrap; gap: 10px; }
.account-benefits span { padding: 8px 11px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); background: rgba(255, 253, 248, .6); font: 650 11px/1 ui-sans-serif, system-ui, sans-serif; }
.account-benefits b { color: var(--red); font-size: 13px; }

.form-panel {
  position: relative;
  padding: 28px;
  border: 1px solid rgba(156, 64, 56, .2);
  border-radius: 24px;
  background: rgba(255, 253, 248, .9);
  box-shadow: 0 24px 70px rgba(66, 49, 32, .14);
  backdrop-filter: blur(14px);
}

.seal { position: absolute; top: -20px; right: 24px; display: grid; place-items: center; width: 50px; height: 50px; border: 2px solid var(--red); color: var(--red); background: var(--paper); font-size: 14px; font-weight: 800; line-height: 1.05; transform: rotate(3deg); }
.account-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; margin-bottom: 24px; padding: 5px; border-radius: 13px; background: #eee6d9; }
.account-tab { min-height: 42px; border: 0; border-radius: 10px; color: var(--muted); background: transparent; font: 800 13px/1 ui-sans-serif, system-ui, sans-serif; cursor: pointer; }
.account-tab.is-active { color: #fff; background: var(--blue); box-shadow: 0 6px 18px rgba(49, 92, 104, .2); }
.account-form { display: grid; gap: 14px; }
.form-heading { margin-bottom: 4px; }
.form-heading strong, .form-heading small { display: block; }
.form-heading strong { font-size: 21px; }
.form-heading small { margin-top: 3px; color: var(--muted); font: 500 12px/1.5 ui-sans-serif, system-ui, sans-serif; }
.account-form label { display: grid; gap: 6px; color: #5f594f; font: 700 12px/1.4 ui-sans-serif, system-ui, sans-serif; }
.account-form input { width: 100%; min-height: 48px; border: 1px solid #cfc4b4; border-radius: 11px; padding: 0 13px; color: var(--ink); background: #fff; outline: none; font: 14px/1 ui-sans-serif, system-ui, sans-serif; }
.account-form input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(49, 92, 104, .12); }
.primary-button { display: flex; align-items: center; justify-content: center; min-height: 48px; margin-top: 4px; border: 0; border-radius: 11px; color: #fff; background: var(--red); text-decoration: none; font: 800 14px/1 ui-sans-serif, system-ui, sans-serif; cursor: pointer; }
.primary-button:hover { background: #84342e; }
.primary-button:disabled { cursor: wait; opacity: .56; }
.secondary-button { min-height: 42px; border: 1px solid var(--line); border-radius: 10px; color: var(--blue); background: transparent; font-weight: 750; cursor: pointer; }
.existing-account { display: grid; gap: 12px; text-align: center; }
.existing-account p { margin: 0; color: var(--muted); font-size: 13px; }
.existing-account strong { font-size: 26px; }
.existing-account small { color: var(--blue); font: 650 12px/1.5 ui-sans-serif, system-ui, sans-serif; }
.account-status { min-height: 22px; margin: 16px 0 0; color: var(--red); text-align: center; font: 650 12px/1.55 ui-sans-serif, system-ui, sans-serif; }
.account-status.is-success { color: #176b53; }
.privacy-note { margin: 8px 0 0; color: #8a8176; text-align: center; font: 500 10px/1.55 ui-sans-serif, system-ui, sans-serif; }
.is-hidden { display: none !important; }

footer { display: flex; justify-content: center; gap: 8px; padding: 0 20px calc(26px + env(safe-area-inset-bottom)); color: var(--muted); font: 500 11px/1.5 ui-sans-serif, system-ui, sans-serif; }
footer a { color: var(--blue); }

@keyframes ink-breathe {
  from { opacity: .45; transform: translate3d(0, 0, 0) scale(.96); }
  to { opacity: .9; transform: translate3d(18px, -10px, 0) scale(1.05); }
}

@media (max-width: 760px) {
  .page-back { position: absolute; }
  .account-shell { grid-template-columns: 1fr; width: min(520px, calc(100% - 28px)); padding: 74px 0 28px; }
  .literary-panel { padding: 16px 6px 32px; }
  h1 { font-size: clamp(38px, 12vw, 56px); }
  .lead { font-size: 15px; }
  blockquote { margin: 25px 0; font-size: 19px; }
  .account-benefits { gap: 7px; }
  .form-panel { padding: 23px 18px; border-radius: 20px; }
}

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