:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; }
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; color: #29352d; background: radial-gradient(circle at 85% 10%, #e6eddd, transparent 42%), #f7f5ef; }
.login-shell { width: min(100% - 32px, 470px); margin: 0 auto; padding: clamp(28px, 8vh, 92px) 0 48px; }
.back { color: #536b55; text-decoration: none; font-size: 14px; }
.back:hover, .back:focus-visible { text-decoration: underline; }
.login-card { margin-top: 28px; padding: clamp(24px, 6vw, 42px); background: #fffdfa; border: 1px solid #e7e9df; border-radius: 24px; box-shadow: 0 18px 60px #27362812; }
.eyebrow { margin: 0 0 22px; color: #7b9176; font-size: 11px; letter-spacing: .19em; font-weight: 700; }
.mark { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 13px; background: #e5eee0; color: #3c7047; font-weight: 800; }
h1 { font-size: clamp(28px, 6vw, 36px); line-height: 1.2; margin: 22px 0 10px; }
.intro { margin: 0 0 29px; color: #6a746b; line-height: 1.7; }
label { display: block; margin-bottom: 9px; font-size: 14px; font-weight: 700; }
input { width: 100%; min-height: 48px; padding: 12px 14px; border: 1px solid #cbd3c9; border-radius: 10px; background: #fff; font: inherit; }
input:focus { outline: 2px solid #83a987; outline-offset: 2px; }
button { width: 100%; min-height: 48px; margin-top: 18px; border: 0; border-radius: 10px; background: #336341; color: white; font: inherit; font-weight: 700; cursor: pointer; }
button:hover { background: #285135; }
button:disabled { cursor: wait; opacity: .65; }
.error { min-height: 1.5em; margin: 10px 0 0; color: #b33b32; font-size: 14px; }