:root {
  --admin-navy: #102a43;
  --admin-blue: #2563eb;
  --admin-cyan: #14b8a6;
  --admin-bg: #f4f7fb;
  --admin-text: #172b4d;
  --admin-muted: #6b7c93;
  --admin-line: #e5ebf2;
  color-scheme: light;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--admin-text);
  background: var(--admin-bg);
  font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button, input, select, textarea { font: inherit; }
button { cursor: pointer; }

.admin-login {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(420px, 1.12fr) minmax(420px, .88fr);
  background: #fff;
}

.login-visual {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: clamp(50px, 8vw, 110px);
  color: #fff;
  background:
    radial-gradient(circle at 20% 20%, #2dd4bf38 0 16%, transparent 38%),
    radial-gradient(circle at 80% 70%, #60a5fa42 0 13%, transparent 36%),
    linear-gradient(145deg, #0b2137 0%, #123b62 55%, #155e75 100%);
}

.login-visual::after {
  position: absolute;
  z-index: -1;
  right: -130px;
  bottom: -140px;
  width: 430px;
  height: 430px;
  border: 1px solid #ffffff2a;
  border-radius: 50%;
  box-shadow: 0 0 0 60px #ffffff0b, 0 0 0 120px #ffffff08;
  content: "";
}

.login-visual-grid {
  position: absolute;
  z-index: -2;
  inset: 0;
  opacity: .24;
  background-image:
    linear-gradient(#ffffff14 1px, transparent 1px),
    linear-gradient(90deg, #ffffff14 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(135deg, #000 0%, transparent 78%);
}

.login-visual-content { max-width: 640px; }
.login-eyebrow { color: #7dd3fc; font-size: 12px; font-weight: 700; letter-spacing: .18em; }
.login-visual h1 { margin: 22px 0 24px; font-size: clamp(42px, 5vw, 72px); line-height: 1.12; letter-spacing: -.04em; }
.login-visual p { max-width: 560px; margin: 0; color: #d5e5f4; font-size: 17px; line-height: 1.9; }
.login-feature-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 36px; }
.login-feature-list span { padding: 8px 13px; border: 1px solid #ffffff2d; border-radius: 999px; background: #ffffff0d; color: #e5f3fb; font-size: 13px; }

.login-panel { display: grid; place-items: center; padding: 48px; background: #fff; }
.login-card { width: min(420px, 100%); }
.login-brand { display: flex; align-items: center; gap: 13px; }
.login-brand-mark { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 13px; background: linear-gradient(145deg, #2563eb, #0f766e); color: #fff; box-shadow: 0 10px 28px #2563eb35; font-size: 14px; font-weight: 800; letter-spacing: .05em; }
.login-brand b, .login-brand small { display: block; }
.login-brand b { font-size: 18px; }
.login-brand small { margin-top: 2px; color: var(--admin-muted); font-size: 12px; font-weight: 500; }
.login-heading { margin: 54px 0 30px; }
.login-heading > span { color: var(--admin-blue); font-size: 13px; font-weight: 700; }
.login-heading h2 { margin: 8px 0 8px; font-size: 30px; line-height: 1.25; letter-spacing: -.02em; }
.login-heading p { margin: 0; color: var(--admin-muted); }
.login-card label { display: grid; gap: 8px; margin-top: 19px; color: #41546a; font-size: 13px; font-weight: 600; }
.login-card input { width: 100%; height: 48px; padding: 0 14px; border: 1px solid #d8e1eb; border-radius: 10px; outline: none; background: #fbfcfe; color: var(--admin-text); transition: border-color .18s, box-shadow .18s, background .18s; }
.login-card input:focus { border-color: #4f83ee; background: #fff; box-shadow: 0 0 0 4px #2563eb16; }
.login-submit { width: 100%; height: 48px; margin-top: 26px; border: 0; border-radius: 10px; background: linear-gradient(100deg, #2563eb, #1d4ed8); color: #fff; box-shadow: 0 10px 24px #2563eb2d; font-weight: 700; transition: box-shadow .18s, background .18s; }
.login-submit:hover { box-shadow: 0 13px 28px #2563eb3a; }
.login-submit:active { background: #1d4ed8; }
.login-submit:disabled { cursor: wait; opacity: .7; }
.login-message { margin: 13px 0 0; text-align: center; font-size: 13px; }
.login-security { margin: 18px 0 0; color: #8a99aa; text-align: center; font-size: 12px; }

.admin-app-shell { min-height: 100vh; }

@media (max-width: 900px) {
  .admin-login { grid-template-columns: 1fr; }
  .login-visual { min-height: 320px; padding: 48px 32px; }
  .login-visual h1 { font-size: 42px; }
  .login-panel { padding: 46px 28px; }
}

@media (max-width: 560px) {
  .login-visual { min-height: 260px; }
  .login-visual h1 { margin: 14px 0; font-size: 34px; }
  .login-visual p { font-size: 14px; }
  .login-feature-list { display: none; }
  .login-heading { margin-top: 38px; }
}