/* =========================================================
   Brainix — signup page
   Plain CSS so the page renders correctly even if the
   Tailwind CDN is slow or blocked.
   ========================================================= */
.su {
  --su-bg: #0B0F17;
  --su-surface: #0F1521;
  --su-elevated: #131A28;
  --su-line: rgba(255, 255, 255, 0.08);
  --su-line-strong: rgba(255, 255, 255, 0.16);
  --su-accent: #00E5FF;
  --su-accent-ink: #04222A;
  --su-success: #22C55E;
  --su-warning: #F59E0B;
  --su-danger: #F87171;
  --su-text: #E4E9F2;
  --su-muted: #8792A6;
  --su-white: #FFFFFF;

  color: var(--su-text);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  min-height: calc(100vh - 4rem);
}
.su *, .su *::before, .su *::after { box-sizing: border-box; }

.su-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  min-height: calc(100vh - 4rem);
}

/* ---------- Form column ---------- */
.su-form-col {
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  padding: 56px 32px 64px;
}
.su-title {
  margin: 0;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 2rem;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--su-white);
}
.su-lede { margin: 10px 0 32px; font-size: 0.975rem; line-height: 1.6; color: var(--su-muted); max-width: 46ch; }

.su-alert {
  margin: 0 0 28px;
  padding: 14px 16px;
  border: 1px solid rgba(248, 113, 113, 0.4);
  border-left-width: 3px;
  border-radius: 10px;
  background: rgba(248, 113, 113, 0.08);
  font-size: 0.875rem;
}
.su-alert:focus { outline: none; }
.su-alert-title { margin: 0 0 6px; font-weight: 600; color: #FECACA; }
.su-alert ul { margin: 0; padding-left: 18px; color: #FCA5A5; display: grid; gap: 4px; }

.su-form { display: flex; flex-direction: column; gap: 28px; }

.su-group { margin: 0; padding: 0; border: 0; min-width: 0; display: flow-root; }
.su-group > * + * { margin-top: 18px; }
.su-group > .su-legend + * { margin-top: 0; }
.su-group + .su-group { padding-top: 28px; border-top: 1px solid var(--su-line); }
.su-legend { float: left; width: 100%; padding: 0; margin: 0 0 18px; font-size: 1rem; font-weight: 600; color: var(--su-white); }
.su-legend + * { clear: both; }
.su-group > .su-group-note { margin-top: -8px; }
.su-group-note { margin: 0; font-size: 0.875rem; line-height: 1.55; color: var(--su-muted); }

.su-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.su-field { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.su-field label, .su-label { font-size: 0.875rem; font-weight: 500; color: var(--su-text); }
.su-optional { font-weight: 400; color: var(--su-muted); margin-left: 6px; }

.su input[type="text"],
.su input[type="email"],
.su input[type="password"],
.su input[type="number"] {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--su-line-strong);
  border-radius: 10px;
  background: var(--su-elevated);
  color: var(--su-white);
  font: inherit;
  font-size: 0.95rem;
  transition: border-color .15s, box-shadow .15s;
}
.su input:hover { border-color: rgba(255, 255, 255, 0.24); }
.su input:focus { outline: none; border-color: var(--su-accent); box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.18); }
.su input.is-invalid { border-color: var(--su-danger); }
.su input.is-invalid:focus { box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.2); }
.su input[type="number"]::-webkit-inner-spin-button,
.su input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
.su input[type="number"] { -moz-appearance: textfield; }

.su-help { margin: 0; font-size: 0.8125rem; line-height: 1.45; color: var(--su-muted); }
.su-help.is-error { color: var(--su-danger); }
.su-help.is-ok { color: var(--su-success); }

/* Password */
.su-password { position: relative; }
.su-password input { padding-right: 64px; }
.su-reveal {
  position: absolute; top: 50%; right: 6px; transform: translateY(-50%);
  height: 34px; padding: 0 10px;
  border: 0; border-radius: 7px; background: transparent;
  color: var(--su-muted); font: inherit; font-size: 0.8125rem; font-weight: 600; cursor: pointer;
}
.su-reveal:hover { color: var(--su-white); background: rgba(255, 255, 255, 0.06); }
.su-reveal:focus-visible { outline: 2px solid var(--su-accent); outline-offset: 1px; }

.su-meter { height: 4px; border-radius: 4px; background: var(--su-line); overflow: hidden; }
.su-meter span { display: block; height: 100%; width: 0; background: var(--su-danger); transition: width .2s, background-color .2s; }

/* Money input */
.su-money { position: relative; }
.su-money span {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--su-muted); font-size: 1rem; pointer-events: none;
}
.su-money input { padding-left: 30px !important; font-family: "Space Grotesk", Inter, sans-serif; font-size: 1.125rem !important; font-weight: 600; font-variant-numeric: tabular-nums; }

.su-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.su-chip {
  height: 34px; padding: 0 14px;
  border: 1px solid var(--su-line-strong); border-radius: 999px;
  background: transparent; color: var(--su-text);
  font: inherit; font-size: 0.8125rem; font-weight: 600; cursor: pointer;
  font-variant-numeric: tabular-nums;
  transition: border-color .15s, background-color .15s, color .15s;
}
.su-chip:hover { border-color: rgba(0, 229, 255, 0.5); }
.su-chip.is-active { border-color: var(--su-accent); background: rgba(0, 229, 255, 0.1); color: var(--su-white); }
.su-chip:focus-visible { outline: 2px solid var(--su-accent); outline-offset: 2px; }

/* Payment method cards */
.su-methods { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.su-method {
  position: relative;
  display: flex; align-items: center; gap: 12px;
  padding: 14px;
  border: 1px solid var(--su-line-strong); border-radius: 12px;
  background: var(--su-elevated);
  cursor: pointer;
  transition: border-color .15s, background-color .15s;
}
.su-method:hover { border-color: rgba(255, 255, 255, 0.26); }
.su-method input { position: absolute; opacity: 0; pointer-events: none; }
.su-method img { width: 32px; height: 32px; border-radius: 50%; flex-shrink: 0; }
.su-method-text { display: flex; flex-direction: column; min-width: 0; }
.su-method-name { font-weight: 600; color: var(--su-white); font-size: 0.95rem; }
.su-method-sub { font-size: 0.8125rem; color: var(--su-muted); }
.su-method-check {
  margin-left: auto; width: 18px; height: 18px; flex-shrink: 0;
  border: 1.5px solid var(--su-line-strong); border-radius: 50%;
  transition: border-color .15s, box-shadow .15s;
}
.su-method:has(input:checked) { border-color: var(--su-accent); background: rgba(0, 229, 255, 0.06); }
.su-method:has(input:checked) .su-method-check { border-color: var(--su-accent); box-shadow: inset 0 0 0 4px var(--su-elevated), inset 0 0 0 9px var(--su-accent); }
.su-method:has(input:focus-visible) { outline: 2px solid var(--su-accent); outline-offset: 2px; }
/* Fallback for browsers without :has() — set by signup.js */
.su-method.is-checked { border-color: var(--su-accent); background: rgba(0, 229, 255, 0.06); }
.su-method.is-checked .su-method-check { border-color: var(--su-accent); box-shadow: inset 0 0 0 4px var(--su-elevated), inset 0 0 0 9px var(--su-accent); }

/* Terms */
.su-terms { display: flex; gap: 12px; align-items: flex-start; font-size: 0.875rem; line-height: 1.55; color: var(--su-muted); cursor: pointer; }
.su-terms input { margin-top: 3px; width: 17px; height: 17px; accent-color: var(--su-accent); flex-shrink: 0; }
.su-terms a, .su-switch a, .su-aside-foot a { color: var(--su-accent); text-decoration: none; font-weight: 600; }
.su-terms a:hover, .su-switch a:hover, .su-aside-foot a:hover { text-decoration: underline; }
.su-terms.is-invalid span { color: var(--su-danger); }

/* Submit */
.su-submit {
  width: 100%; height: 52px;
  border: 0; border-radius: 12px;
  background: var(--su-accent); color: var(--su-accent-ink);
  font: inherit; font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: filter .15s, transform .05s;
}
.su-submit:hover { filter: brightness(1.08); }
.su-submit:active { transform: translateY(1px); }
.su-submit:focus-visible { outline: 2px solid var(--su-white); outline-offset: 3px; }
.su-submit[disabled] { opacity: 0.7; cursor: progress; }
.su-after { margin: -14px 0 0; text-align: center; font-size: 0.8125rem; color: var(--su-muted); }

.su-switch { margin: 32px 0 0; text-align: center; font-size: 0.9rem; color: var(--su-muted); }

/* ---------- Aside ---------- */
.su-aside {
  position: relative;
  border-left: 1px solid var(--su-line);
  background:
    radial-gradient(900px 500px at 100% 0%, rgba(0, 229, 255, 0.07), transparent 60%),
    var(--su-surface);
}
.su-aside-inner {
  position: sticky; top: 4rem;
  max-width: 480px;
  padding: 72px 48px 56px;
}
.su-aside-kicker { margin: 0 0 12px; font-size: 0.875rem; font-weight: 600; color: var(--su-accent); }
.su-aside-title {
  margin: 0 0 36px;
  font-family: "Space Grotesk", Inter, sans-serif;
  font-size: 1.75rem; line-height: 1.2; font-weight: 700; letter-spacing: -0.02em;
  color: var(--su-white);
}

.su-steps { list-style: none; margin: 0 0 36px; padding: 0; display: grid; gap: 0; }
.su-steps li { position: relative; display: flex; gap: 16px; padding-bottom: 26px; }
.su-steps li:last-child { padding-bottom: 0; }
.su-steps li:not(:last-child)::before {
  content: ""; position: absolute; left: 14px; top: 32px; bottom: 4px; width: 1px; background: var(--su-line-strong);
}
.su-step-n {
  flex-shrink: 0; width: 29px; height: 29px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(0, 229, 255, 0.45); color: var(--su-accent);
  font-size: 0.8125rem; font-weight: 700; background: var(--su-surface);
}
.su-steps strong { display: block; margin-top: 4px; font-size: 0.95rem; color: var(--su-white); font-weight: 600; }
.su-steps p { margin: 4px 0 0; font-size: 0.875rem; line-height: 1.55; color: var(--su-muted); }

.su-facts {
  margin: 0 0 32px; padding: 18px 0; border-top: 1px solid var(--su-line); border-bottom: 1px solid var(--su-line);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.su-facts div { min-width: 0; }
.su-facts dt { font-size: 0.8125rem; color: var(--su-muted); }
.su-facts dd { margin: 4px 0 0; font-family: "Space Grotesk", Inter, sans-serif; font-size: 1.25rem; font-weight: 700; color: var(--su-white); font-variant-numeric: tabular-nums; }

.su-aside-foot { margin: 0; font-size: 0.875rem; line-height: 1.6; color: var(--su-muted); }

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
  .su-grid { grid-template-columns: 1fr; }
  .su-aside { border-left: 0; border-top: 1px solid var(--su-line); }
  .su-aside-inner { position: static; max-width: 540px; margin: 0 auto; padding: 48px 32px 56px; }
}
@media (max-width: 560px) {
  .su-form-col { padding: 36px 20px 48px; }
  .su-title { font-size: 1.625rem; }
  .su-row, .su-methods { grid-template-columns: 1fr; }
  .su-aside-inner { padding: 40px 20px 48px; }
  .su-aside-title { font-size: 1.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  .su * { transition: none !important; }
}

/* =========================================================
   Two-step flow (enabled by signup.js; without JavaScript
   both steps simply show on one page)
   ========================================================= */
.su-step { display: flex; flex-direction: column; gap: 28px; }
.su-step[hidden] { display: none; }

.su-progress { display: none; }
.su-wizard .su-progress {
  display: flex; align-items: center; gap: 12px;
  list-style: none; margin: 0; padding: 0;
}
.su-progress-item { display: flex; align-items: center; gap: 10px; font-size: 0.875rem; font-weight: 500; color: var(--su-muted); white-space: nowrap; }
.su-progress-n {
  width: 26px; height: 26px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--su-line-strong); font-size: 0.75rem; font-weight: 700; color: var(--su-muted);
  transition: background-color .2s, border-color .2s, color .2s;
}
.su-progress-bar { flex: 1; height: 1px; background: var(--su-line-strong); position: relative; overflow: hidden; }
.su-progress-bar::after { content: ""; position: absolute; inset: 0; background: var(--su-accent); transform: scaleX(0); transform-origin: left; transition: transform .3s ease; }
.su-progress-item.is-current { color: var(--su-white); }
.su-progress-item.is-current .su-progress-n { border-color: var(--su-accent); color: var(--su-accent); }
.su-progress-item.is-done { color: var(--su-text); }
.su-progress-item.is-done .su-progress-n { background: var(--su-accent); border-color: var(--su-accent); color: var(--su-accent-ink); }
.su-progress.is-step-2 .su-progress-bar::after { transform: scaleX(1); }

.su-legend:focus { outline: none; }

/* "Creating account for …" recap on step 2 */
.su-who {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px 14px; border: 1px solid var(--su-line); border-radius: 10px; background: var(--su-elevated);
}
.su-who[hidden] { display: none; }
.su-who > div { display: flex; flex-direction: column; min-width: 0; }
.su-who-label { font-size: 0.75rem; color: var(--su-muted); }
.su-who-value { font-size: 0.9rem; color: var(--su-white); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.su-link {
  border: 0; background: transparent; padding: 6px 8px; border-radius: 6px;
  color: var(--su-accent); font: inherit; font-size: 0.875rem; font-weight: 600; cursor: pointer;
}
.su-link:hover { background: rgba(0, 229, 255, 0.08); }
.su-link:focus-visible { outline: 2px solid var(--su-accent); outline-offset: 1px; }

/* Back + submit */
.su-actions { display: flex; gap: 12px; }
.su-actions .su-submit { flex: 1; }
.su-back { display: none; }
.su-wizard .su-back {
  display: inline-flex; align-items: center; justify-content: center;
  height: 52px; padding: 0 22px; flex-shrink: 0;
  border: 1px solid var(--su-line-strong); border-radius: 12px; background: transparent;
  color: var(--su-text); font: inherit; font-size: 1rem; font-weight: 600; cursor: pointer;
}
.su-wizard .su-back:hover { border-color: rgba(255, 255, 255, 0.3); color: var(--su-white); }
.su-back:focus-visible { outline: 2px solid var(--su-accent); outline-offset: 3px; }

.su-next { display: none; }
.su-wizard .su-next { display: block; }

/* Aside follows the current step */
.su-steps li { transition: opacity .2s; }
.su-wizard-on .su-steps li { opacity: 0.55; }
.su-wizard-on .su-steps li.is-current { opacity: 1; }
.su-steps li.is-current .su-step-n { background: rgba(0, 229, 255, 0.12); border-color: var(--su-accent); }
.su-steps li.is-done .su-step-n { background: var(--su-accent); color: var(--su-accent-ink); border-color: var(--su-accent); }

/* Step change: one short, purposeful transition */
@keyframes su-step-in { from { opacity: 0; transform: translateX(12px); } to { opacity: 1; transform: none; } }
@keyframes su-step-back { from { opacity: 0; transform: translateX(-12px); } to { opacity: 1; transform: none; } }
.su-step.is-entering { animation: su-step-in .22s ease-out; }
.su-step.is-returning { animation: su-step-back .22s ease-out; }
@media (prefers-reduced-motion: reduce) { .su-step.is-entering, .su-step.is-returning { animation: none; } }

@media (max-width: 560px) {
  .su-progress-item span:last-child { font-size: 0.8125rem; }
  .su-wizard .su-back { padding: 0 16px; }
}
.su-help:empty { display: none; }