:root {
  --brand-violet: #302070;
  --brand-violet-deep: #241753;
  --brand-teal: #75b7af;
  --brand-teal-soft: #d8efec;
  --brand-orange: #d67b45;
  --brand-cream: #f7eed9;
  --ink: #25223a;
  --muted: #716f7e;
  --line: #dedde6;
  --paper: #ffffff;
  --surface: #f5f5f8;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: "Arial Narrow", "Roboto Condensed", "Segoe UI", Arial, sans-serif;
  font-stretch: condensed;
}

button,
input { font: inherit; }

button { -webkit-tap-highlight-color: transparent; }

.is-hidden { display: none !important; }

.loading-screen {
  min-height: 100vh;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 24px;
  color: var(--brand-violet);
  background: var(--paper);
}

.loading-screen img { width: min(320px, 74vw); }

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(390px, 0.9fr) minmax(560px, 1.1fr);
}

.brand-panel {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: #fff;
  background: var(--brand-violet);
}

.brand-panel::before,
.brand-panel::after {
  content: "";
  position: absolute;
  border-radius: 48% 52% 54% 46%;
  pointer-events: none;
}

.brand-panel::before {
  width: 420px;
  height: 420px;
  right: -190px;
  top: -130px;
  background: var(--brand-teal);
  transform: rotate(22deg);
}

.brand-panel::after {
  width: 250px;
  height: 250px;
  left: -110px;
  bottom: -90px;
  background: var(--brand-orange);
}

.brand-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  background-image:
    radial-gradient(circle at 18px 18px, #fff 2px, transparent 2.5px),
    radial-gradient(circle at 62px 54px, var(--brand-teal) 7px, transparent 7.5px),
    linear-gradient(135deg, transparent 44%, rgba(255,255,255,.28) 45%, rgba(255,255,255,.28) 48%, transparent 49%);
  background-size: 86px 86px, 112px 112px, 142px 142px;
  mask-image: linear-gradient(to bottom, transparent, #000 28%, #000 84%, transparent);
}

.brand-panel-content {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: clamp(42px, 7vw, 90px);
}

.brand-logo-card {
  width: min(410px, 100%);
  padding: 22px 26px;
  border-radius: 26px 26px 26px 8px;
  background: #fff;
  box-shadow: 0 24px 60px rgba(16, 9, 47, .25);
}

.brand-logo-card img { display: block; width: 100%; height: auto; }

.brand-kicker {
  margin: 42px 0 14px;
  color: var(--brand-teal-soft);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.brand-panel h1,
.auth-heading h2,
.knowledge-content h1 {
  font-family: Impact, "Arial Black", "Segoe UI Black", sans-serif;
  font-weight: 900;
  letter-spacing: .025em;
}

.brand-panel h1 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(44px, 5vw, 76px);
  line-height: .98;
  text-transform: uppercase;
}

.brand-description {
  max-width: 480px;
  margin: 24px 0 0;
  color: rgba(255,255,255,.78);
  font-size: 19px;
  line-height: 1.45;
}

.brand-mark {
  position: absolute;
  right: clamp(34px, 5vw, 70px);
  bottom: clamp(34px, 5vw, 64px);
  width: 62px;
  height: 62px;
  border: 3px solid rgba(255,255,255,.55);
  border-radius: 50%;
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  top: -19px;
  width: 3px;
  height: 21px;
  background: rgba(255,255,255,.55);
}

.brand-mark::before { left: 14px; transform: rotate(-25deg); }
.brand-mark::after { right: 14px; transform: rotate(25deg); }
.brand-mark span { position: absolute; top: 18px; width: 8px; height: 8px; border: 2px solid #fff; border-radius: 50%; }
.brand-mark span:first-child { left: 13px; }
.brand-mark span:last-child { right: 13px; }

.auth-panel {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: clamp(28px, 5vw, 76px);
  background:
    linear-gradient(135deg, rgba(117,183,175,.11), transparent 42%),
    var(--surface);
}

.auth-card {
  width: min(100%, 500px);
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid rgba(48,32,112,.09);
  border-radius: 34px 34px 34px 10px;
  background: var(--paper);
  box-shadow: 0 26px 80px rgba(48,32,112,.12);
  transition: width .25s ease;
}

.auth-card-wide { width: min(100%, 680px); }

.auth-heading p,
.knowledge-content p {
  margin: 0 0 8px;
  color: var(--brand-orange);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.auth-heading h2 {
  margin: 0;
  color: var(--brand-violet);
  font-size: clamp(34px, 4vw, 50px);
  line-height: 1;
  text-transform: uppercase;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 30px 0 26px;
  padding: 5px;
  border-radius: 14px;
  background: #efeff4;
}

.auth-tabs button,
.auth-tabs a {
  min-height: 44px;
  display: grid;
  place-items: center;
  padding: 0 16px;
  border: 0;
  border-radius: 10px;
  color: var(--muted);
  background: transparent;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.auth-tabs button.is-active,
.auth-tabs a.is-active {
  color: #fff;
  background: var(--brand-violet);
  box-shadow: 0 7px 16px rgba(48,32,112,.24);
}

.auth-form { display: grid; gap: 17px; }

.registration-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 17px;
}

.registration-grid .field-wide { grid-column: 1 / -1; }

.auth-form label { display: grid; gap: 8px; }

.auth-form label > span {
  color: #49465a;
  font-size: 14px;
  font-weight: 800;
}

.auth-form input {
  width: 100%;
  height: 52px;
  padding: 0 15px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: #fbfbfd;
  outline: none;
  transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
}

.auth-form input:hover { border-color: #bebbcf; }

.auth-form input:focus {
  border-color: var(--brand-teal);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(117,183,175,.18);
}

.form-error {
  margin: 0;
  padding: 12px 14px;
  border-left: 4px solid var(--brand-orange);
  border-radius: 8px;
  color: #7c3515;
  background: #fff2eb;
  font-size: 14px;
  line-height: 1.4;
}

.submit-button {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 4px;
  padding: 0 10px 0 20px;
  border: 0;
  border-radius: 14px;
  color: #fff;
  background: var(--brand-violet);
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 12px 26px rgba(48,32,112,.24);
}

.submit-button b {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  color: var(--brand-violet);
  background: var(--brand-teal);
  font-size: 22px;
}

.submit-button:hover { background: var(--brand-violet-deep); transform: translateY(-1px); }
.submit-button:disabled { opacity: .65; cursor: wait; transform: none; }

.auth-switch-copy {
  margin: 24px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

.auth-switch-copy button,
.auth-switch-copy a {
  padding: 0;
  border: 0;
  color: var(--brand-violet);
  background: transparent;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}

.knowledge-page {
  min-height: 100vh;
  background:
    radial-gradient(circle at 85% 18%, rgba(117,183,175,.2), transparent 26%),
    var(--surface);
}

.knowledge-header {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 16px clamp(24px, 5vw, 72px);
  border-bottom: 1px solid rgba(48,32,112,.1);
  background: #fff;
}

.knowledge-header img { width: 230px; height: auto; }

.knowledge-account { display: flex; align-items: center; gap: 18px; font-weight: 800; }

.knowledge-account form { margin: 0; }

.knowledge-account button {
  min-height: 40px;
  padding: 0 17px;
  border: 1px solid var(--brand-violet);
  border-radius: 10px;
  color: var(--brand-violet);
  background: transparent;
  font-weight: 900;
  cursor: pointer;
}

.knowledge-content { padding: clamp(54px, 9vw, 120px) clamp(24px, 8vw, 120px); }

.knowledge-content h1 {
  margin: 0;
  color: var(--brand-violet);
  font-size: clamp(52px, 9vw, 120px);
  line-height: .95;
  text-transform: uppercase;
}

@media (max-width: 1200px) {
  .auth-shell { grid-template-columns: 1fr; }
  .brand-panel, .brand-panel-content { min-height: auto; }
  .brand-panel::before {
    width: 180px;
    height: 180px;
    right: -70px;
    top: -80px;
  }
  .brand-panel::after { display: none; }
  .brand-panel-content {
    min-height: 82px;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 16px;
    padding: 10px 24px;
  }
  .brand-logo-card {
    flex: 0 0 auto;
    width: 140px;
    padding: 7px 9px;
    border-radius: 10px 10px 10px 4px;
  }
  .brand-kicker {
    max-width: 145px;
    margin: 0;
    font-size: 11px;
    line-height: 1.35;
  }
  .brand-description {
    max-width: 280px;
    margin: 0;
    font-size: 12px;
    line-height: 1.35;
  }
  .brand-mark { display: none; }
  .auth-panel { min-height: auto; padding: 28px 18px 48px; }
}

@media (max-width: 600px) {
  .brand-panel-content { min-height: 70px; gap: 12px; padding: 8px 16px; }
  .brand-logo-card { width: 112px; padding: 6px 7px; border-radius: 9px 9px 9px 3px; }
  .brand-kicker { max-width: 118px; font-size: 10px; letter-spacing: .08em; }
  .brand-description { display: none; }
  .auth-card { padding: 26px 20px; border-radius: 24px 24px 24px 8px; }
  .auth-heading h2 { font-size: 34px; }
  .registration-grid { grid-template-columns: 1fr; }
  .registration-grid .field-wide { grid-column: auto; }
  .knowledge-header { align-items: flex-start; padding: 14px 18px; }
  .knowledge-header img { width: 170px; }
  .knowledge-account { align-items: flex-end; flex-direction: column; gap: 8px; font-size: 13px; }
  .knowledge-content { padding: 64px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}