:root {
  --accent: #005EB8;
  --accent-2: #0a78e0;
  --bg: #F5F5F7;
  --surface: #FFFFFF;
  --ink: #1d1d1f;
  --ink-2: #56565c;
  --ink-3: #86868b;
  --line: #E8E8ED;
  --danger: #B3261E;
  --danger-bg: #FBE5E3;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}
:root[data-theme="dark"] {
  --accent: #3D9BFF;
  --accent-2: #5FB0FF;
  --bg: #0E0E11;
  --surface: #1A1A1F;
  --ink: #F2F2F5;
  --ink-2: #B8B8C2;
  --ink-3: #82828E;
  --line: #2C2C34;
  --danger: #FF6B61;
  --danger-bg: #36211f;
}
html { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

.login-stage {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  /* quiet radial wash in the brand blue */
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(0,94,184,.10), transparent 60%),
    radial-gradient(700px 460px at -10% 110%, rgba(0,94,184,.07), transparent 55%),
    var(--bg);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 30px 28px 24px;
  box-shadow: 0 1px 2px rgba(0,0,0,.05), 0 24px 60px rgba(0,0,0,.10);
}

.login-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.login-mark {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--accent); color: #fff;
  font-weight: 800; font-size: 14px; letter-spacing: .02em;
  display: grid; place-items: center;
  box-shadow: 0 4px 12px rgba(0,94,184,.32);
}
.login-brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.login-brand-text strong { font-size: 15.5px; font-weight: 650; }
.login-brand-text span { font-size: 12px; color: var(--ink-3); }

h1 { margin: 0 0 4px; font-size: 23px; font-weight: 700; letter-spacing: -.01em; }
.login-sub { margin: 0 0 22px; font-size: 13.5px; color: var(--ink-2); line-height: 1.45; }

.login-field { display: block; margin-bottom: 14px; }
.login-field > span {
  display: block; margin-bottom: 6px;
  font-size: 12.5px; font-weight: 600; color: var(--ink-2);
}
.login-field input {
  width: 100%; padding: 11px 13px;
  font-size: 15px; font-family: inherit;
  color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 11px;
  transition: border-color .15s, box-shadow .15s;
}
.login-field input:focus {
  outline: 0; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,94,184,.15);
}

.login-pw-wrap { position: relative; }
.login-pw-wrap input { padding-right: 62px; }
.login-pw-toggle {
  position: absolute; right: 7px; top: 50%; transform: translateY(-50%);
  border: 0; background: transparent; cursor: pointer;
  font-size: 12.5px; font-weight: 600; color: var(--accent);
  padding: 6px 8px; border-radius: 8px;
}
.login-pw-toggle:hover { background: rgba(0,94,184,.08); }

.login-error {
  margin: 2px 0 12px; padding: 10px 13px;
  background: var(--danger-bg); color: var(--danger);
  border-radius: 11px; font-size: 13px; font-weight: 550;
}

.login-submit {
  width: 100%; padding: 12px;
  font-size: 15px; font-weight: 650; font-family: inherit;
  color: #fff; background: var(--accent);
  border: 0; border-radius: 12px; cursor: pointer;
  box-shadow: 0 4px 14px rgba(0,94,184,.30);
  transition: background .15s, transform .1s;
}
.login-submit:hover { background: var(--accent-2); }
.login-submit:active { transform: scale(.99); }
.login-submit:disabled { opacity: .6; cursor: default; }

.login-foot {
  margin: 18px 0 0; text-align: center;
  font-size: 12px; color: var(--ink-3);
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; }
}

@media (max-width: 560px) {
  .login-card { padding: 26px 20px 20px; border-radius: 18px; }
  .login-field input { font-size: 16px; }  /* prevent iOS Safari zoom on focus */
  h1 { font-size: 21px; }
}