.auth-shell { min-height: 100vh; display: grid; grid-template-columns: minmax(360px, .95fr) 1.05fr; background: var(--bg-dark); animation: auth-enter .42s ease both; }
.auth-story { position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: space-between; padding: clamp(28px, 5vw, 72px); color: #fff; background: linear-gradient(145deg, #101d16, #0d1318 80%); }
.auth-story:before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(180,255,205,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(180,255,205,.025) 1px, transparent 1px); background-size: 42px 42px; }
.auth-story:after { display: none; }
.story-copy { position: relative; z-index: 1; max-width: 550px; padding: 56px 0; }
.eyebrow { color: var(--neon-green); font-size: 11px; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; }
.story-copy h1 { max-width: 520px; margin: 18px 0; color: var(--text-main); font: 600 clamp(40px, 5vw, 66px)/1.03 'Space Grotesk', sans-serif; letter-spacing: 0; }
.story-copy p { max-width: 410px; margin: 0; color: #c1d0d8; font-size: 16px; line-height: 1.75; }
.story-foot { position: relative; z-index: 1; color: #91a7b2; font-size: 12px; }
.auth-panel { display: grid; place-items: center; padding: 40px 24px; background: #0b0e14; }
.auth-form-wrap { width: min(100%, 410px); }
.auth-form-wrap h2 { margin: 0 0 9px; color: var(--text-main); font: 600 32px 'Space Grotesk', sans-serif; letter-spacing: 0; }
.auth-sub { margin: 0 0 30px; color: var(--text-muted); font-size: 14px; line-height: 1.6; }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px; margin-bottom: 25px; border-radius: 9px; background: #141c24; }
.auth-tab { padding: 10px; border: 0; border-radius: 6px; color: var(--text-muted); background: transparent; font-size: 13px; font-weight: 700; text-align: center; text-decoration: none; }
.auth-tab.active { color: var(--text-main); background: #1e303d; box-shadow: inset 0 0 0 1px var(--border-glass); }
.auth-error { min-height: 20px; margin: 11px 0 0; color: #ff8297; font-size: 12px; line-height: 1.5; }
.demo-button { display: block; width: 100%; min-height: 42px; margin-top: 8px; padding: 10px; border: 1px solid var(--border-glass); border-radius: 7px; color: var(--text-main); background: #131d25; font-size: 13px; font-weight: 700; text-align: center; text-decoration: none; }
.demo-button:hover { border-color: var(--border-glow); color: var(--neon-green); background: #182735; }
@media (max-width: 720px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-story { min-height: 235px; padding: 22px 24px; }
  .story-copy { padding: 38px 0 8px; }
  .story-copy h1 { max-width: 390px; margin: 11px 0 7px; font-size: 37px; }
  .story-copy p, .story-foot { display: none; }
  .auth-panel { align-items: start; padding: 32px 24px 44px; }
  .auth-form-wrap h2 { font-size: 28px; }
}