@import url("https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Noto+Sans+KR:wght@400;500;700&family=Space+Grotesk:wght@500;700&display=swap");

:root {
  --ink: #172d29;
  --muted: #58706b;
  --line: #c8ddd6;
  --paper: #fbfdf9;
  --mint: #d8eee5;
  --teal: #0f766e;
  --teal-dark: #084d48;
  --amber: #d97706;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Noto Sans KR", sans-serif;
  background:
    radial-gradient(circle at 12% 18%, rgba(255, 255, 255, 0.96), transparent 32%),
    repeating-linear-gradient(135deg, rgba(15, 118, 110, 0.035) 0 1px, transparent 1px 13px),
    linear-gradient(145deg, #edf6f1, var(--mint));
}

.login-layout {
  width: min(920px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(250px, 0.65fr);
  align-items: center;
  gap: 18px;
  padding: 32px 0;
}

.login-card,
.signal-card {
  border: 1px solid rgba(108, 143, 134, 0.34);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(22, 78, 69, 0.13);
}

.login-card {
  padding: clamp(28px, 6vw, 52px);
  background: rgba(251, 253, 249, 0.94);
}

.eyebrow {
  color: var(--amber);
  font-family: "DM Mono", monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.13em;
}

h1 {
  margin: 12px 0 14px;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 7vw, 3.45rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

.intro {
  max-width: 480px;
  margin: 0 0 28px;
  color: var(--muted);
  line-height: 1.65;
}

form {
  display: grid;
  gap: 10px;
}

.hidden {
  display: none !important;
}

.setup-copy {
  display: grid;
  gap: 3px;
  margin-bottom: 5px;
  padding: 11px 13px;
  border-radius: 10px;
  color: var(--teal-dark);
  background: #e8f5f0;
}

.setup-copy span {
  color: var(--muted);
  font-size: 0.78rem;
}

label {
  font-size: 0.86rem;
  font-weight: 700;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 14px;
  color: var(--ink);
  background: #fff;
  font: inherit;
}

input:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.13);
}

button {
  margin-top: 3px;
  border: 0;
  border-radius: 12px;
  padding: 13px 16px;
  color: #fff;
  background: var(--teal);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--teal-dark);
}

button:disabled {
  cursor: wait;
  opacity: 0.6;
}

.status {
  min-height: 1.35em;
  margin: 1px 0 0;
  color: var(--danger);
  font-size: 0.8rem;
}

.security-note {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--amber);
  background: #fff9ed;
  display: grid;
  gap: 3px;
  font-size: 0.76rem;
}

.security-note span {
  color: #765425;
  line-height: 1.5;
}

.signal-card {
  min-height: 430px;
  padding: 26px;
  color: #e9fff8;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.08), transparent 42%),
    var(--teal-dark);
  display: grid;
  align-content: end;
  gap: 9px;
  overflow: hidden;
  position: relative;
}

.signal-card::before {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  top: -70px;
  right: -75px;
  border: 38px solid rgba(158, 231, 216, 0.1);
  border-radius: 50%;
}

.signal-card span,
.signal-card small {
  color: #a8d7cd;
  font-family: "DM Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.signal-card strong {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
}

.signal-lines {
  height: 58px;
  display: flex;
  align-items: flex-end;
  gap: 7px;
  margin: 4px 0 12px;
}

.signal-lines i {
  width: 14px;
  border-radius: 3px 3px 0 0;
  background: #7ad5c2;
}

.signal-lines i:nth-child(1) { height: 16px; }
.signal-lines i:nth-child(2) { height: 28px; }
.signal-lines i:nth-child(3) { height: 42px; }
.signal-lines i:nth-child(4) { height: 58px; }

@media (max-width: 680px) {
  .login-layout {
    width: min(100% - 24px, 520px);
    grid-template-columns: 1fr;
    padding: 12px 0;
  }

  .login-card {
    padding: 28px 22px;
    border-radius: 19px;
  }

  .signal-card {
    display: none;
  }
}