:root {
  --ink: #121018;
  --muted: #6b6478;
  --line: #e4dff2;
  --paper: #f3efff;
  --surface: #ffffff;
  --accent: #804dff;
  --accent-soft: rgba(128, 77, 255, 0.14);
  --bad: #b4232f;
  --bad-bg: #fcecee;
  --tabs-bg: #f7f4ff;
  --input-bg: #fff;
  --sans: "Manrope", "Segoe UI", sans-serif;
}

html[data-theme="dark"] {
  --ink: #eeeaf8;
  --muted: #9a93ab;
  --line: #2e2940;
  --paper: #100e16;
  --surface: #1a1624;
  --accent: #9b7aff;
  --accent-soft: rgba(155, 122, 255, 0.18);
  --bad: #f07178;
  --bad-bg: rgba(240, 113, 120, 0.14);
  --tabs-bg: #14101c;
  --input-bg: #14101c;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--sans);
  background:
    radial-gradient(900px 400px at 10% 0%, rgba(128,77,255,0.16), transparent 55%),
    radial-gradient(700px 360px at 100% 100%, rgba(46,230,197,0.1), transparent 50%),
    var(--paper);
  color: var(--ink);
  font-size: 14px;
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}
html[data-theme="dark"] body {
  background:
    radial-gradient(900px 400px at 10% 0%, rgba(155,122,255,0.16), transparent 55%),
    radial-gradient(700px 360px at 100% 100%, rgba(0,0,0,0.35), transparent 50%),
    var(--paper);
}

.card {
  width: min(400px, 100%);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 1px 0 rgba(18,16,24,0.04), 0 18px 40px rgba(18,16,24,0.08);
  animation: rise .4s ease both;
}
html[data-theme="dark"] .card {
  box-shadow: 0 1px 0 rgba(0,0,0,0.25), 0 18px 40px rgba(0,0,0,0.4);
}
@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.back { margin: 0 0 14px; }
.back a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 550;
  text-decoration: none;
}
.back a:hover { color: var(--accent); }

.brand { display: flex; flex-direction: column; gap: 8px; margin-bottom: 24px; }
.brand-mark {
  font-family: "HeliosExtBlack", "Manrope", Arial, sans-serif;
  font-weight: 900;
  font-size: 28px;
  letter-spacing: -1px;
  text-transform: lowercase;
  color: var(--ink);
  line-height: 1;
}
.brand p { margin: 0; color: var(--muted); font-size: 12.5px; }

label { display: block; margin-bottom: 14px; }
label span {
  display: block; font-size: 12px; font-weight: 600;
  color: var(--muted); margin-bottom: 5px;
}
input {
  width: 100%; border: 1px solid var(--line); background: var(--input-bg);
  color: var(--ink); border-radius: 9px; padding: 10px 12px; font: inherit;
}
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.error {
  color: var(--bad); background: var(--bad-bg);
  border-radius: 9px; padding: 9px 12px; font-size: 13px; margin: 0 0 14px;
}
.error[hidden] { display: none; }

.submit {
  width: 100%; border: 0; border-radius: 10px; padding: 11px 16px;
  font: inherit; font-weight: 650; cursor: pointer; color: #fff;
  background: var(--accent);
}
.submit:hover { background: #6b3fd4; }
html[data-theme="dark"] .submit:hover { background: #b39bff; color: #121018; }
.submit:disabled { opacity: 0.6; cursor: wait; }

.hint {
  margin: 18px 0 0; text-align: center; color: var(--muted);
  font-size: 12px; line-height: 1.6;
}
.hint a { color: var(--accent); font-weight: 700; text-decoration: none; }
.hint a:hover { text-decoration: underline; }