/* Login page */
:root {
  --h1: 250; --h2: 190;
  --accent: hsl(var(--h1) 85% 62%);
  --grad: linear-gradient(120deg, hsl(var(--h1) 82% 60%), hsl(var(--h2) 88% 46%));
  --bg: #f4f6fc; --card: rgba(255, 255, 255, .92); --field: #f7f8fd;
  --text: #171c33; --muted: #646d8c; --line: #e1e5f2; --line-strong: #cdd3e8;
  --danger: #e0294b;
  --shadow: 0 1px 2px rgba(30, 40, 90, .06), 0 30px 70px -20px rgba(40, 50, 120, .28);
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0b0f1f; --card: rgba(22, 27, 52, .9); --field: #12172f;
  --text: #e9edff; --muted: #9aa5cf; --line: #262e55; --line-strong: #36407a;
  --danger: #ff6b86; --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 30px 70px -20px rgba(0, 0, 0, .7);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0f1f; --card: rgba(22, 27, 52, .9); --field: #12172f;
    --text: #e9edff; --muted: #9aa5cf; --line: #262e55; --line-strong: #36407a;
    --danger: #ff6b86; --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 30px 70px -20px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; color: var(--text); background: var(--bg);
  font: 14px/1.6 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; }

.page { display: grid; grid-template-columns: 1.1fr 1fr; min-height: 100vh; }

/* ---------- brand panel ---------- */
.brand { position: relative; overflow: hidden; color: #fff; padding: 48px 56px;
  background:
    radial-gradient(700px 500px at 15% 10%, hsl(var(--h1) 90% 62% / .55), transparent 60%),
    radial-gradient(600px 500px at 90% 90%, hsl(var(--h2) 95% 50% / .45), transparent 60%),
    linear-gradient(150deg, #10143a, #0a1d3f 55%, #062a3c); }
.grid { position: absolute; inset: 0; opacity: .14;
  background-image: linear-gradient(rgba(255,255,255,.5) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.5) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse at 50% 45%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 45%, #000 20%, transparent 75%); }
.brand-inner { position: relative; height: 100%; display: flex; flex-direction: column; max-width: 520px; margin: 0 auto; }
.logo-row { display: flex; align-items: center; gap: 12px; }
.logo { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.28); backdrop-filter: blur(6px); }
.logo svg { width: 24px; height: 24px; }
.logo-text { font-size: 18px; font-weight: 800; letter-spacing: .5px; }

/* radar */
.radar { position: relative; width: min(340px, 70%); aspect-ratio: 1; margin: 48px auto 40px; border-radius: 50%;
  background: radial-gradient(circle, hsl(var(--h2) 90% 55% / .14), transparent 70%); }
.ring { position: absolute; border-radius: 50%; border: 1px solid hsl(var(--h2) 90% 70% / .35); }
.r1 { inset: 0; } .r2 { inset: 12.5%; } .r3 { inset: 25%; } .r4 { inset: 37.5%; }
.cross { position: absolute; inset: 0;
  background: linear-gradient(hsl(var(--h2) 90% 70% / .25), hsl(var(--h2) 90% 70% / .25)) center / 1px 100% no-repeat,
              linear-gradient(90deg, hsl(var(--h2) 90% 70% / .25), hsl(var(--h2) 90% 70% / .25)) center / 100% 1px no-repeat; }
.sweep { position: absolute; inset: 0; border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg, transparent 290deg, hsl(var(--h2) 95% 60% / .05) 300deg, hsl(var(--h2) 95% 62% / .55) 360deg);
  animation: spin 4s linear infinite; }
.sweep::after { content: ""; position: absolute; left: 50%; top: 0; width: 2px; height: 50%; transform: translateX(-50%);
  background: linear-gradient(to top, transparent, hsl(var(--h2) 100% 75%)); box-shadow: 0 0 12px hsl(var(--h2) 100% 70%); }
.core { position: absolute; left: 50%; top: 50%; width: 12px; height: 12px; margin: -6px 0 0 -6px; border-radius: 50%;
  background: #fff; box-shadow: 0 0 0 4px hsl(var(--h2) 95% 60% / .35), 0 0 20px hsl(var(--h2) 100% 70%); }
.blip { position: absolute; width: 9px; height: 9px; margin: -4.5px 0 0 -4.5px; border-radius: 50%;
  background: hsl(var(--h2) 100% 72%); box-shadow: 0 0 10px hsl(var(--h2) 100% 70%); opacity: 0;
  animation: blip 4s ease-out infinite; }
.blip::after { content: ""; position: absolute; inset: -6px; border-radius: 50%; border: 1px solid hsl(var(--h2) 100% 72% / .8);
  animation: ping 4s ease-out infinite; animation-delay: inherit; }
.b1 { left: 70%; top: 24%; animation-delay: .35s; }
.b2 { left: 80%; top: 58%; animation-delay: 1.15s; background: hsl(var(--h1) 100% 78%); }
.b3 { left: 42%; top: 82%; animation-delay: 2.1s; }
.b4 { left: 18%; top: 52%; animation-delay: 2.85s; background: hsl(330 100% 75%); box-shadow: 0 0 10px hsl(330 100% 70%); }
.b5 { left: 32%; top: 22%; animation-delay: 3.5s; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes blip { 0% { opacity: 0; transform: scale(.4); } 8% { opacity: 1; transform: scale(1.2); } 20% { transform: scale(1); } 70% { opacity: .7; } 100% { opacity: 0; } }
@keyframes ping { 0% { transform: scale(.5); opacity: 0; } 8% { opacity: 1; } 40% { transform: scale(2.6); opacity: 0; } 100% { opacity: 0; } }

.brand h2 { margin: 0 0 22px; font-size: 26px; line-height: 1.35; font-weight: 800; letter-spacing: .5px;
  text-shadow: 0 4px 20px rgba(0,0,0,.25); }
.features { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.features li { display: flex; gap: 14px; align-items: flex-start; padding: 12px 14px; border-radius: 14px;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(6px); }
.features i { flex: none; width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-style: normal; font-size: 16px;
  background: linear-gradient(135deg, hsl(var(--h1) 85% 64%), hsl(var(--h2) 90% 50%)); box-shadow: 0 6px 16px hsl(var(--h1) 70% 40% / .45); }
.features span { display: flex; flex-direction: column; font-size: 12.5px; color: rgba(255,255,255,.75); }
.features b { font-size: 14px; color: #fff; font-weight: 700; }

/* ---------- login side ---------- */
.side { position: relative; display: grid; place-items: center; padding: 40px 24px;
  background:
    radial-gradient(600px 400px at 100% 0%, hsl(var(--h2) 90% 60% / .12), transparent 60%),
    radial-gradient(600px 400px at 0% 100%, hsl(var(--h1) 90% 65% / .12), transparent 60%); }
.card { width: 100%; max-width: 400px; padding: 40px 38px 28px; border-radius: 24px;
  background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow); backdrop-filter: blur(18px);
  animation: rise .6s cubic-bezier(.2,.8,.2,1) both; }
@keyframes rise { from { opacity: 0; transform: translateY(18px) scale(.98); } to { opacity: 1; transform: none; } }
.card.shake { animation: shake .45s cubic-bezier(.36,.07,.19,.97); }
@keyframes shake { 15%, 85% { transform: translateX(-2px); } 30%, 70% { transform: translateX(5px); } 45%, 55% { transform: translateX(-7px); } }

.card-head { margin-bottom: 28px; }
.card-head h1 { margin: 0; font-size: 26px; font-weight: 800; letter-spacing: .3px; }
.card-head p { margin: 6px 0 0; color: var(--muted); font-size: 13.5px; }

/* floating-label fields */
.field { position: relative; margin-bottom: 16px; }
.field .ico { position: absolute; left: 14px; top: 50%; width: 19px; height: 19px; transform: translateY(-50%); color: var(--muted);
  pointer-events: none; transition: color .2s; }
.field input { width: 100%; height: 54px; padding: 20px 46px 6px 44px; font: inherit; font-size: 15px; color: var(--text);
  background: var(--field); border: 1.5px solid var(--line); border-radius: 14px; transition: border-color .2s, box-shadow .2s, background .2s; }
.field label { position: absolute; left: 45px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 14.5px;
  pointer-events: none; transition: top .18s, font-size .18s, color .18s; }
.field input:focus, .field input:not(:placeholder-shown) { background: var(--card); }
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px hsl(var(--h1) 85% 62% / .16); }
.field input:focus ~ label, .field input:not(:placeholder-shown) ~ label { top: 16px; font-size: 11.5px; font-weight: 650; }
.field input:focus ~ label, .field:focus-within .ico { color: var(--accent); }
.field input:-webkit-autofill { -webkit-text-fill-color: var(--text); box-shadow: 0 0 0 40px var(--field) inset; transition: background-color 9999s; }
.field input:-webkit-autofill ~ label { top: 16px; font-size: 11.5px; }

.eye { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); width: 36px; height: 36px; padding: 0; display: grid; place-items: center;
  border: 0; border-radius: 10px; background: transparent; color: var(--muted); cursor: pointer; transition: background .15s, color .15s; }
.eye:hover { background: hsl(var(--h1) 80% 62% / .12); color: var(--accent); }
.eye svg { width: 19px; height: 19px; }
.eye .eye-off { display: none; }
.eye[aria-pressed="true"] .eye-on, .eye[aria-pressed="true"] .eye-open { display: none; }
.eye[aria-pressed="true"] .eye-off { display: block; }

.caps { margin: -8px 0 12px 4px; font-size: 12px; color: #c27803; display: flex; gap: 6px; align-items: center; }
.caps::before { content: "⇪"; font-weight: 700; }
/* display:flex above would otherwise override the hidden attribute */
.caps[hidden] { display: none; }

/* switch */
.remember { display: flex; align-items: center; gap: 12px; margin: 6px 0 20px; cursor: pointer; user-select: none; }
.remember input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch { flex: none; position: relative; width: 40px; height: 23px; border-radius: 999px; background: var(--line-strong); transition: background .2s; }
.switch::after { content: ""; position: absolute; left: 3px; top: 3px; width: 17px; height: 17px; border-radius: 50%; background: #fff;
  box-shadow: 0 2px 5px rgba(0,0,0,.2); transition: transform .22s cubic-bezier(.3,1.4,.6,1); }
.remember input:checked + .switch { background: var(--grad); }
.remember input:checked + .switch::after { transform: translateX(17px); }
.remember input:focus-visible + .switch { box-shadow: 0 0 0 3px hsl(var(--h1) 85% 62% / .35); }
.remember-text { display: flex; flex-direction: column; font-size: 13.5px; font-weight: 650; }
.remember-text small { font-weight: 400; font-size: 11.5px; color: var(--muted); }

.error { display: flex; gap: 8px; align-items: center; margin: 0 0 16px; padding: 10px 13px; border-radius: 12px; font-size: 13px;
  color: var(--danger); background: color-mix(in srgb, var(--danger) 10%, transparent); border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent); }
.error::before { content: "!"; flex: none; width: 18px; height: 18px; border-radius: 50%; display: grid; place-items: center;
  font-size: 12px; font-weight: 800; color: #fff; background: var(--danger); }
.error[hidden] { display: none; }

/* button */
.primary { position: relative; overflow: hidden; width: 100%; height: 52px; border: 0; border-radius: 14px; cursor: pointer;
  color: #fff; font: inherit; font-size: 15.5px; font-weight: 750; letter-spacing: 2px;
  background: var(--grad); background-size: 160% 100%; box-shadow: 0 14px 30px -10px hsl(var(--h1) 75% 45% / .7);
  transition: transform .15s, box-shadow .2s, background-position .4s; }
.primary::before { content: ""; position: absolute; top: 0; left: -60%; width: 40%; height: 100%; transform: skewX(-20deg);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.4), transparent); transition: left .7s; }
.primary:hover { transform: translateY(-1px); background-position: 100% 0; box-shadow: 0 18px 34px -10px hsl(var(--h1) 75% 45% / .8); }
.primary:hover::before { left: 130%; }
.primary:active { transform: translateY(0) scale(.99); }
.primary:disabled { cursor: progress; }
.primary .spinner, .primary .check { position: absolute; left: 50%; top: 50%; opacity: 0; transition: opacity .2s; }
.primary .spinner { width: 22px; height: 22px; margin: -11px 0 0 -11px; border-radius: 50%;
  border: 2.5px solid rgba(255,255,255,.35); border-top-color: #fff; animation: spin .7s linear infinite; }
.primary .check { width: 26px; height: 26px; margin: -13px 0 0 -13px; stroke-dasharray: 24; stroke-dashoffset: 24; }
.primary.loading .label, .primary.done .label { opacity: 0; }
.primary.loading .spinner { opacity: 1; }
.primary.done { background: linear-gradient(120deg, #12b886, #0ca678); }
.primary.done .check { opacity: 1; animation: draw .4s .05s ease forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

.foot { display: flex; gap: 7px; align-items: center; justify-content: center; margin: 24px 0 0; font-size: 12px; color: var(--muted); }
.foot svg { width: 15px; height: 15px; flex: none; }

:focus-visible { outline: 3px solid hsl(var(--h1) 90% 65%); outline-offset: 2px; }
.field input:focus-visible { outline: none; }

@media (max-width: 900px) {
  .page { grid-template-columns: 1fr; }
  .brand { display: none; }
  .side { min-height: 100vh;
    background:
      radial-gradient(500px 400px at 0% 0%, hsl(var(--h1) 90% 65% / .28), transparent 60%),
      radial-gradient(500px 400px at 100% 100%, hsl(var(--h2) 90% 55% / .24), transparent 60%), var(--bg); }
}
@media (max-width: 440px) { .card { padding: 30px 22px 22px; border-radius: 20px; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } .blip { opacity: .8; } }