:root {
  color-scheme: dark;
  --ink: #f5f7ff;
  --muted: #9aa4bb;
  --line: rgba(255,255,255,.11);
  --accent: #ff795d;
  --accent-2: #ffab75;
  --panel: rgba(17,23,41,.78);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 10%, rgba(59,88,180,.32), transparent 34rem),
    radial-gradient(circle at 84% 84%, rgba(225,76,57,.2), transparent 30rem),
    #080b13;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent);
}

.shell {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(430px, .92fr);
}

.welcome {
  padding: clamp(2rem, 6vw, 6rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: .8rem;
  font-size: .78rem;
  font-weight: 760;
  letter-spacing: .18em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  aspect-ratio: 1;
  border-radius: .7rem;
  color: #15100e;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 12px 34px rgba(255,121,93,.24);
}

.eyebrow {
  margin: 0 0 1.35rem;
  color: var(--accent-2);
  font-size: .7rem;
  font-weight: 760;
  letter-spacing: .22em;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 5.7vw, 6.8rem);
  font-weight: 500;
  letter-spacing: -.055em;
  line-height: .94;
}

.intro {
  max-width: 32rem;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.25vw, 1.18rem);
  line-height: 1.65;
}

.privacy {
  margin: 0;
  color: #7f899f;
  font-size: .78rem;
}

.privacy span {
  margin-right: .5rem;
  color: #55d69e;
  font-size: .65rem;
}

.signin {
  display: grid;
  place-items: center;
  padding: 2rem;
}

.card {
  width: min(100%, 28rem);
  padding: clamp(1.7rem, 4vw, 2.7rem);
  border: 1px solid var(--line);
  border-radius: 1.6rem;
  background: var(--panel);
  box-shadow: 0 30px 90px rgba(0,0,0,.38);
  backdrop-filter: blur(18px);
}

.card-heading { margin-bottom: 2rem; }

.mobile-brand { display: none; }

h2 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -.035em;
}

.card-heading > p:last-child {
  margin: .55rem 0 0;
  color: var(--muted);
}

label {
  display: block;
  margin-top: 1.2rem;
}

label > span:first-child {
  display: block;
  margin-bottom: .5rem;
  color: #c8cede;
  font-size: .78rem;
  font-weight: 680;
}

input {
  width: 100%;
  height: 3.35rem;
  padding: 0 1rem;
  border: 1px solid var(--line);
  border-radius: .85rem;
  outline: none;
  color: var(--ink);
  background: rgba(4,7,14,.65);
  font: inherit;
  transition: border-color .18s, box-shadow .18s;
}

input:focus {
  border-color: rgba(255,138,108,.82);
  box-shadow: 0 0 0 4px rgba(255,121,93,.12);
}

.password-field { position: relative; display: block; }

.password-field input { padding-right: 4.3rem; }

.password-field button {
  position: absolute;
  top: 50%;
  right: .7rem;
  transform: translateY(-50%);
  border: 0;
  padding: .45rem;
  color: var(--accent-2);
  background: transparent;
  font: inherit;
  font-size: .78rem;
  font-weight: 700;
  cursor: pointer;
}

.submit {
  width: 100%;
  height: 3.45rem;
  margin-top: 1.6rem;
  padding: 0 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 0;
  border-radius: .9rem;
  color: #180d0a;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 14px 35px rgba(255,121,93,.22);
  font: inherit;
  font-weight: 780;
  cursor: pointer;
  transition: transform .18s, box-shadow .18s;
}

.submit:hover { transform: translateY(-1px); box-shadow: 0 18px 42px rgba(255,121,93,.3); }
.submit:active { transform: translateY(0); }

.error {
  display: block;
  margin: 0 0 1.2rem;
  padding: .8rem .9rem;
  border: 1px solid rgba(255,103,103,.24);
  border-radius: .8rem;
  color: #ffc1c1;
  background: rgba(148,34,45,.18);
  font-size: .85rem;
  line-height: 1.4;
}

.error[hidden] { display: none; }

.hint {
  margin: 1.25rem 0 0;
  color: #717b90;
  text-align: center;
  font-size: .76rem;
}

@media (max-width: 800px) {
  .shell { grid-template-columns: 1fr; }
  .welcome { display: none; }
  .signin { min-height: 100vh; padding: 1.1rem; }
  .card { border-radius: 1.3rem; }
  .mobile-brand {
    display: block;
    margin: 0 0 1.7rem;
    color: var(--accent-2);
    font-size: .7rem;
    font-weight: 780;
    letter-spacing: .2em;
  }
}

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