:root {
  color-scheme: dark;
  --ink: #f7f9fc;
  --muted: #9ca6b7;
  --line: rgba(255, 255, 255, 0.1);
  --panel: rgba(16, 21, 31, 0.88);
  --accent: #6ee7c5;
  --accent-strong: #35cda3;
  --danger: #ff8585;
  --warning: #ffd27a;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; color: var(--ink); background: #080b11; }
button, input { font: inherit; }
button { color: inherit; }

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(420px, 1.05fr) minmax(420px, 0.95fr);
  background:
    radial-gradient(circle at 16% 18%, rgba(57, 201, 163, 0.2), transparent 30%),
    radial-gradient(circle at 82% 80%, rgba(82, 111, 255, 0.14), transparent 32%),
    #080b11;
}

.brand-panel { min-height: 100vh; display: flex; flex-direction: column; padding: 54px clamp(42px, 6vw, 92px); border-right: 1px solid var(--line); }
.brand-lockup, .mobile-brand { display: flex; align-items: center; gap: 12px; letter-spacing: 0.06em; }
.brand-lockup strong, .mobile-brand strong { font-size: 18px; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 11px; color: #07130f; background: var(--accent); box-shadow: 0 0 30px rgba(110, 231, 197, 0.28); }
.brand-copy { max-width: 660px; margin: auto 0; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: 0.18em; }
.brand-copy h1 { max-width: 650px; margin: 22px 0 20px; font-size: clamp(42px, 5vw, 72px); line-height: 1.08; letter-spacing: -0.045em; }
.brand-copy p { max-width: 580px; margin: 0; color: var(--muted); font-size: 17px; line-height: 1.8; }
.trust-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 0; padding: 0; list-style: none; }
.trust-list li { display: flex; gap: 12px; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,0.025); }
.trust-list i { color: var(--accent); font-size: 11px; font-style: normal; }
.trust-list span { display: grid; gap: 6px; }
.trust-list strong { font-size: 13px; }
.trust-list small { color: var(--muted); font-size: 11px; line-height: 1.5; }

.form-panel { display: grid; place-items: center; padding: 34px; }
.form-card { width: min(100%, 470px); padding: 42px; border: 1px solid var(--line); border-radius: 24px; background: var(--panel); box-shadow: 0 30px 90px rgba(0,0,0,0.34); backdrop-filter: blur(18px); }
.mobile-brand { display: none; margin-bottom: 30px; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 5px; border-radius: 13px; background: rgba(255,255,255,0.045); }
.tabs button { padding: 11px 14px; border: 0; border-radius: 9px; color: var(--muted); background: transparent; cursor: pointer; }
.tabs button[aria-selected="true"] { color: var(--ink); background: rgba(255,255,255,0.1); box-shadow: 0 3px 12px rgba(0,0,0,.18); }
.form-heading { margin: 38px 0 28px; }
.form-heading h2 { margin: 10px 0 8px; font-size: 30px; letter-spacing: -0.03em; }
.form-heading p { margin: 0; color: var(--muted); line-height: 1.65; }
form { display: grid; gap: 17px; }
label { display: grid; gap: 8px; }
label span { color: #d7dce5; font-size: 13px; font-weight: 600; }
input { width: 100%; padding: 14px 15px; border: 1px solid var(--line); border-radius: 11px; outline: none; color: var(--ink); background: rgba(255,255,255,0.045); transition: border-color .2s, box-shadow .2s; }
input:focus { border-color: rgba(110,231,197,.66); box-shadow: 0 0 0 3px rgba(110,231,197,.09); }
input::placeholder { color: #687285; }
.primary-button { margin-top: 5px; padding: 14px 18px; border: 0; border-radius: 11px; color: #04100d; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--accent-strong)); cursor: pointer; box-shadow: 0 12px 28px rgba(53,205,163,.18); }
.primary-button:disabled { cursor: wait; opacity: .62; }
.message { margin-top: 20px; padding: 13px 15px; border: 1px solid rgba(110,231,197,.3); border-radius: 11px; color: var(--accent); background: rgba(110,231,197,.08); line-height: 1.55; }
.message.error { color: var(--danger); border-color: rgba(255,133,133,.28); background: rgba(255,133,133,.08); }
.message.pending { color: var(--warning); border-color: rgba(255,210,122,.28); background: rgba(255,210,122,.08); }
.privacy-note { margin: 28px 0 0; color: #70798a; font-size: 11px; text-align: center; }

@media (max-width: 980px) {
  .auth-shell { grid-template-columns: 1fr; }
  .brand-panel { display: none; }
  .form-panel { min-height: 100vh; padding: 22px; }
  .form-card { padding: 30px 24px; }
  .mobile-brand { display: flex; }
}

@media (max-width: 480px) {
  .form-card { border: 0; background: transparent; box-shadow: none; backdrop-filter: none; }
  .form-heading { margin-top: 30px; }
}