:root {
  color-scheme: light;
  --ink: #24342f;
  --muted: #6e7b74;
  --sage: #64775d;
  --sage-deep: #43584c;
  --paper: #f6f3ec;
  --rose: #b86d51;
  --line: rgba(67, 88, 76, .18);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  background:
    radial-gradient(circle at 12% 14%, rgba(184, 109, 81, .16), transparent 30%),
    radial-gradient(circle at 86% 82%, rgba(100, 119, 93, .22), transparent 33%),
    var(--paper);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(67, 88, 76, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(67, 88, 76, .035) 1px, transparent 1px);
  background-size: 34px 34px;
}

.login-shell {
  position: relative;
  z-index: 1;
  width: min(1080px, calc(100% - 40px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  align-items: center;
  gap: clamp(44px, 8vw, 110px);
  padding: 64px 0;
}

.login-intro img { width: 78px; height: 78px; object-fit: contain; margin-bottom: 34px; }
.eyebrow { margin: 0 0 14px; color: var(--rose); font-size: 12px; font-weight: 700; letter-spacing: .16em; }
.login-intro h1 { margin: 0; font-size: clamp(38px, 5.2vw, 66px); line-height: 1.12; letter-spacing: -.045em; font-weight: 700; }
.login-intro h1 span { display: block; white-space: nowrap; }
.login-intro > p:not(.eyebrow) { max-width: 560px; margin: 28px 0 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.login-note { display: inline-flex; align-items: center; gap: 10px; margin-top: 34px; padding: 10px 15px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.5); color: var(--sage-deep); font-size: 13px; }
.login-note i { width: 8px; height: 8px; border-radius: 50%; background: var(--sage); box-shadow: 0 0 0 5px rgba(100,119,93,.12); }

.login-card { padding: clamp(28px, 5vw, 50px); border: 1px solid rgba(67, 88, 76, .15); border-radius: 28px; background: rgba(255, 255, 255, .84); box-shadow: 0 30px 80px rgba(55, 72, 63, .14); backdrop-filter: blur(18px); }
.login-card h2 { margin: 0; font-size: 30px; letter-spacing: -.03em; }
.helper { margin: 12px 0 30px; color: var(--muted); line-height: 1.65; }
form { display: grid; gap: 20px; }
label { display: grid; gap: 9px; color: var(--sage-deep); font-size: 13px; font-weight: 650; }
input { width: 100%; height: 52px; padding: 0 16px; border: 1px solid rgba(67, 88, 76, .24); border-radius: 13px; outline: none; background: #fff; color: var(--ink); font: inherit; font-size: 16px; transition: border-color .2s, box-shadow .2s; }
input:focus { border-color: var(--sage); box-shadow: 0 0 0 4px rgba(100,119,93,.12); }
button { height: 54px; border: 0; border-radius: 13px; color: #fff; background: var(--sage-deep); font: inherit; font-size: 15px; font-weight: 700; cursor: pointer; transition: transform .2s, opacity .2s, background .2s; }
button:hover { background: #34483e; transform: translateY(-1px); }
button:disabled { cursor: wait; opacity: .65; transform: none; }
.error { min-height: 20px; margin: -5px 0 -6px; color: #a84f44; font-size: 13px; }
.privacy { margin: 28px 0 0; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; line-height: 1.7; }

@media (max-width: 760px) {
  .login-shell { grid-template-columns: 1fr; width: min(520px, calc(100% - 28px)); gap: 38px; padding: 38px 0; }
  .login-intro img { width: 62px; height: 62px; margin-bottom: 22px; }
  .login-intro h1 { font-size: 40px; }
  .login-intro > p:not(.eyebrow) { margin-top: 18px; }
}

@media (max-width: 430px) {
  .login-intro h1 { font-size: clamp(31px, 9.6vw, 40px); }
}