:root {
  --bg: #F3F4F7; --card: #FFFFFF; --ink: #12151C; --muted: #5B6270; --faint: #8A93A3;
  --line: #E3E1EE; --grid: rgba(47, 75, 199, .055); --accent: #2F4BC7; --accent2: #4458DA; --ring: rgba(47, 75, 199, .18);
  --loss: #B4410F; --loss-soft: #FDEBE2; --blob1: rgba(99, 102, 241, .16); --blob2: rgba(20, 168, 154, .13); --blob3: rgba(255, 170, 120, .14);
  --shadow: 0 1px 2px rgba(18, 21, 28, .05), 0 18px 50px rgba(47, 52, 110, .10);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0E1015; --card: #171A21; --ink: #ECEEF2; --muted: #A1A8B5; --faint: #7D8594; --line: #2A2F3B;
    --grid: rgba(142, 162, 255, .05); --accent: #8EA2FF; --accent2: #6F86F5; --ring: rgba(142, 162, 255, .25);
    --loss: #FF9E73; --loss-soft: #3A2219; --blob1: rgba(99, 102, 241, .18); --blob2: rgba(20, 168, 154, .12); --blob3: rgba(255, 150, 100, .08);
    --shadow: 0 18px 50px rgba(0, 0, 0, .45);
  }
}
:root[data-theme="dark"] {
  --bg: #0E1015; --card: #171A21; --ink: #ECEEF2; --muted: #A1A8B5; --faint: #7D8594; --line: #2A2F3B;
  --grid: rgba(142, 162, 255, .05); --accent: #8EA2FF; --accent2: #6F86F5; --ring: rgba(142, 162, 255, .25);
  --loss: #FF9E73; --loss-soft: #3A2219; --blob1: rgba(99, 102, 241, .18); --blob2: rgba(20, 168, 154, .12); --blob3: rgba(255, 150, 100, .08);
  --shadow: 0 18px 50px rgba(0, 0, 0, .45);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background:
    radial-gradient(600px 380px at 8% -5%, var(--blob1), transparent 70%),
    radial-gradient(520px 360px at 100% 0%, var(--blob3), transparent 70%),
    radial-gradient(700px 420px at 50% 115%, var(--blob2), transparent 70%),
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 44px 44px,
    var(--bg);
  color: var(--ink); font-family: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased; min-height: 100vh;
}
.wrap { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 40px 16px 56px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { border-radius: 12px; box-shadow: 0 6px 18px rgba(47, 75, 199, .25); }
.brand .name { font-size: 24px; font-weight: 800; letter-spacing: -.02em; }
.brand .name span { color: var(--muted); font-weight: 700; }
.bar { width: 92px; height: 4px; border-radius: 4px; margin: 16px 0 26px; background: linear-gradient(90deg, #8B7CF6, #14A89A); }
.card { width: 100%; max-width: 440px; background: var(--card); border: 1px solid var(--line); border-radius: 28px;
  padding: 36px 32px 28px; box-shadow: var(--shadow); display: flex; flex-direction: column; }
h1 { margin: 0; font-size: 28px; font-weight: 800; letter-spacing: -.02em; text-align: center; }
.sub { margin: 6px 0 22px; text-align: center; color: var(--muted); font-size: 14px; }
label { font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--faint); margin: 14px 0 8px; text-align: center; }
input[type="email"], input[type="password"], input[type="text"] {
  width: 100%; height: 56px; border-radius: 16px; border: 1.5px solid var(--line); background: var(--card); color: var(--ink);
  font: inherit; font-size: 16px; padding: 0 18px; outline: none; transition: border-color .15s, box-shadow .15s;
}
input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--ring); }
.pw { position: relative; }
.pw input { padding-right: 54px; }
.eye { position: absolute; right: 6px; top: 6px; width: 44px; height: 44px; border: none; border-radius: 12px; background: transparent;
  color: var(--faint); cursor: pointer; display: flex; align-items: center; justify-content: center; }
.eye:hover, .eye[aria-pressed="true"] { color: var(--accent); }
.keep { text-transform: none; letter-spacing: 0; font-size: 14px; font-weight: 500; color: var(--muted); display: flex; align-items: center;
  justify-content: center; gap: 8px; margin: 18px 0 4px; cursor: pointer; }
.keep input { width: 18px; height: 18px; accent-color: var(--accent); }
.err { min-height: 22px; margin: 8px 0 6px; text-align: center; font-size: 14px; font-weight: 600; color: var(--loss); }
.err:empty { min-height: 8px; }
.go { height: 58px; border: none; border-radius: 18px; color: #fff; font: inherit; font-size: 17px; font-weight: 800; cursor: pointer;
  background: linear-gradient(135deg, #5468E6, #2F4BC7 55%, #2A3FA8); box-shadow: 0 10px 24px rgba(47, 75, 199, .32);
  transition: transform .08s, box-shadow .15s; }
.go:hover { box-shadow: 0 12px 28px rgba(47, 75, 199, .42); }
.go:active { transform: translateY(1px); }
.go:disabled { opacity: .7; cursor: default; }
.go:focus-visible, .eye:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.foot { margin: 20px 0 0; text-align: center; font-size: 13px; color: var(--faint); line-height: 1.5; }
.foot code { font-size: 12px; background: var(--bg); padding: 2px 6px; border-radius: 6px; color: var(--muted); }
@media (max-width: 420px) { .card { padding: 30px 20px 24px; border-radius: 24px; } .brand .name { font-size: 21px; } }