:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --panel: #ffffff;
  --panel-soft: #f1f5f3;
  --line: #d9e4e0;
  --text: #17231f;
  --muted: #5f716c;
  --accent: #167866;
  --accent-strong: #0f6657;
  --danger: #b42318;
  --font: "PingFang SC", "Noto Sans SC", "Microsoft YaHei UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
}

.login-layout {
  width: min(1180px, calc(100% - 40px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(380px, .75fr);
  align-items: center;
  gap: clamp(56px, 8vw, 120px);
  padding: 64px 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 36px;
  border: 1px solid rgba(22, 120, 102, .28);
  border-radius: 16px;
  color: #ffffff;
  background: var(--accent);
  font-size: 25px;
  font-weight: 800;
  box-shadow: 0 14px 34px rgba(22, 120, 102, .18);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .16em;
}

.login-intro h1 {
  max-width: 660px;
  margin: 0;
  font-size: clamp(42px, 5.2vw, 68px);
  line-height: 1.02;
  letter-spacing: -.055em;
}

.intro-copy {
  max-width: 630px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.boundary-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

.boundary-list span {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: var(--panel);
  font-size: 14px;
}

.login-card {
  padding: clamp(28px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 22px 60px rgba(28, 48, 42, .12);
}

.card-heading h2 {
  margin: 0;
  font-size: 30px;
  letter-spacing: -.035em;
}

.card-heading > p:last-child {
  margin: 10px 0 28px;
  color: var(--muted);
  line-height: 1.65;
}

form { display: grid; gap: 18px; }

label { display: grid; gap: 8px; }

label span {
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
}

input {
  width: 100%;
  height: 52px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  outline: none;
  color: var(--text);
  background: #ffffff;
  font: inherit;
  transition: border-color .15s, box-shadow .15s;
}

input:focus {
  border-color: rgba(22, 120, 102, .62);
  box-shadow: 0 0 0 4px rgba(22, 120, 102, .1);
}

.form-error {
  min-height: 20px;
  margin: -4px 0 -2px;
  color: var(--danger);
  font-size: 14px;
}

button {
  height: 50px;
  border: 0;
  border-radius: 12px;
  color: #ffffff;
  background: var(--accent);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  transition: transform .15s, background .15s;
}

button:hover { background: var(--accent-strong); transform: translateY(-1px); }
button:disabled { opacity: .62; cursor: wait; transform: none; }

.login-note {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

@media (max-width: 820px) {
  .login-layout {
    grid-template-columns: 1fr;
    gap: 42px;
    padding: 40px 0;
  }
  .login-intro h1 { font-size: clamp(40px, 12vw, 62px); }
  .brand-mark { margin-bottom: 28px; }
}

@media (max-width: 480px) {
  .login-layout { width: min(100% - 24px, 1180px); }
  .login-card { padding: 24px 20px; border-radius: 20px; }
}