:root {
  --ink: #12211e;
  --muted: #61706c;
  --line: #d5d8d0;
  --accent: #0b7a67;
  --paper: #f2f2ec;
  --surface: #fffef9;
  --font: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", "Cascadia Code", monospace;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(rgba(18, 33, 30, .026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 33, 30, .026) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  font-family: var(--font);
}

.login-shell { min-height: 100vh; display: grid; grid-template-columns: minmax(360px, .95fr) minmax(440px, 1.05fr); }
.login-story { display: flex; min-height: 100vh; flex-direction: column; padding: clamp(32px, 5vw, 72px); color: #f8fafc; background: #10231f; }
.brand { display: flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand span { display: grid; width: 46px; height: 46px; place-items: center; border: 1px solid rgba(255,255,255,.26); background: var(--accent); font-family: var(--mono); font-weight: 900; }
.brand strong { font-size: 18px; }
.story-copy { margin: auto 0; max-width: 680px; }
.eyebrow { margin: 0 0 16px; color: #8fd6c6; font-family: var(--mono); font-size: 12px; font-weight: 800; letter-spacing: .18em; }
.story-copy h1 { max-width: 650px; margin: 0; font-size: clamp(40px, 5vw, 74px); line-height: 1.04; letter-spacing: -.045em; }
.story-copy > p:last-child { max-width: 590px; margin: 28px 0 0; color: #aab6c8; font-size: 18px; line-height: 1.8; }
.login-story ul { display: grid; margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.14); }
.login-story li { display: flex; gap: 18px; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.14); color: #dbe6f3; }
.login-story li b { color: #8fd6c6; font-family: var(--mono); }

.login-panel { display: grid; min-height: 100vh; place-items: center; padding: 32px; }
.login-card { width: min(520px, 100%); border: 1px solid var(--line); background: var(--surface); padding: clamp(30px, 5vw, 58px); box-shadow: 0 24px 70px rgba(15, 23, 42, .12); }
.login-card h2 { margin: 0; font-size: clamp(28px, 4vw, 43px); line-height: 1.12; letter-spacing: -.035em; }
.intro { margin: 18px 0 30px; color: var(--muted); line-height: 1.7; }
form { display: grid; gap: 18px; }
.login-actions { display: grid; gap: 10px; }
label { display: grid; gap: 8px; font-size: 14px; font-weight: 750; }
input { width: 100%; border: 1px solid #b8c4d3; border-radius: 0; background: #fff; padding: 15px 16px; color: var(--ink); font: inherit; }
input:focus { outline: 3px solid rgba(11,122,103,.18); border-color: var(--accent); }
button { border: 1px solid var(--accent); background: var(--accent); color: white; padding: 15px 18px; font: inherit; font-weight: 800; cursor: pointer; }
button:hover { background: #086656; }
button:disabled { cursor: wait; opacity: .62; }
.guest-entry {
  display: grid;
  min-height: 48px;
  place-items: center;
  border: 1px solid var(--accent);
  color: var(--accent);
  background: transparent;
  text-decoration: none;
  font-weight: 800;
}
.guest-entry:hover { background: rgba(11,122,103,.07); }
.guest-entry:focus-visible { outline: 3px solid rgba(11,122,103,.18); outline-offset: 2px; }
.error { margin: 0; border-left: 3px solid #b91c1c; background: #fff1f2; color: #991b1b; padding: 12px 14px; line-height: 1.55; }
.guest-note { margin: 18px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.support { margin: 24px 0 0; border-top: 1px solid var(--line); padding-top: 20px; color: #69788b; font-size: 13px; line-height: 1.7; }

@media (max-width: 850px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-story { min-height: auto; padding: 28px 24px 34px; }
  .story-copy { margin: 64px 0 48px; }
  .story-copy h1 { font-size: clamp(36px, 11vw, 58px); }
  .login-panel { min-height: auto; padding: 24px 16px 48px; }
}