:root {
  --bg: #120e0c;
  --card: rgb(255 255 255 / .07);
  --line: rgb(255 255 255 / .16);
  --text: #f4efe9;
  --muted: rgb(255 255 255 / .62);
  --accent: #ff7a45;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI Variable", "Segoe UI", Roboto, Inter, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f4f1;
    --card: #ffffff;
    --line: #e6e0d8;
    --text: #17130f;
    --muted: #6a6259;
    --accent: #e8501f;
    color-scheme: light;
  }
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0; min-height: 100dvh; display: grid; place-items: center; padding: 1.25rem;
  font: 16px/1.5 var(--font); color: var(--text); -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(55% 70% at 90% 0%, rgb(255 122 69 / .45), transparent 70%),
    radial-gradient(50% 70% at 0% 100%, rgb(139 61 255 / .35), transparent 70%),
    var(--bg);
  background-attachment: fixed;
}
@media (prefers-color-scheme: light) {
  body {
    background:
      radial-gradient(55% 70% at 90% 0%, rgb(255 122 69 / .22), transparent 70%),
      radial-gradient(50% 70% at 0% 100%, rgb(139 61 255 / .14), transparent 70%),
      var(--bg);
  }
}
main { width: min(420px, 100%); }
.card {
  padding: clamp(1.5rem, 5vw, 2.25rem); background: var(--card); border: 1px solid var(--line); border-radius: 26px;
  backdrop-filter: blur(18px); box-shadow: 0 30px 60px -30px rgb(0 0 0 / .5);
}
.logo {
  display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 1.25rem; color: #fff; border-radius: 16px;
  background: linear-gradient(145deg, #ff8a5b, #d6336c);
}
h1 { margin: 0; font-size: 1.75rem; font-weight: 800; letter-spacing: -.03em; line-height: 1.1; }
.sub { margin: .5rem 0 1.5rem; color: var(--muted); }
form { display: grid; gap: 1rem; }
label { display: grid; gap: .4rem; font-size: .85rem; font-weight: 600; }
label span { color: var(--muted); }
input[type="text"], input[type="password"] {
  width: 100%; height: 50px; padding: 0 1rem; font: inherit; font-size: 1rem; color: var(--text);
  background: transparent; border: 1px solid var(--line); border-radius: 14px; transition: border-color .15s, box-shadow .15s;
}
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 25%, transparent); }
.btn {
  display: flex; align-items: center; justify-content: center; width: 100%; height: 50px; margin-top: .5rem; padding: 0 1.5rem;
  font: inherit; font-weight: 600; letter-spacing: .01em; color: #fff; text-decoration: none; cursor: pointer;
  background: linear-gradient(180deg, #ff7f4d, #e8501f); border: 0; border-radius: 14px;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / .28), 0 8px 20px -10px rgb(232 80 31 / .8);
  transition: transform .15s, filter .15s;
}
.btn:hover { filter: brightness(1.06); }
.btn:active { transform: scale(.985); }
.btn:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }
.btn.secondary { color: var(--text); background: transparent; border: 1px solid var(--line); box-shadow: none; }
.btn.secondary:hover { border-color: var(--accent); filter: none; }
.error {
  margin: 0 0 1rem; padding: .7rem .9rem; font-size: .9rem; color: #ff9b9b;
  background: rgb(255 80 80 / .12); border: 1px solid rgb(255 80 80 / .35); border-radius: 12px;
}
.info {
  margin: 0 0 1rem; padding: .7rem .9rem; font-size: .9rem; color: var(--text);
  background: rgb(120 200 140 / .14); border: 1px solid rgb(120 200 140 / .4); border-radius: 12px;
}
@media (prefers-color-scheme: light) { .error { color: #b42318; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }