:root {
  --bg-0: #0b0b12;
  --bg-1: #111327;
  --bg-2: #161a33;
  --panel: rgba(18, 22, 40, 0.9);
  --border: rgba(120, 130, 170, 0.18);
  --text: #f2f4ff;
  --muted: #a3accf;
  --accent: #4dd1ff;
  --accent-2: #ffbf5f;
  --shadow: 0 22px 50px rgba(4, 6, 14, 0.55);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans JP", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(77, 209, 255, 0.2), transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(255, 191, 95, 0.18), transparent 35%),
    linear-gradient(135deg, var(--bg-0), var(--bg-1) 45%, var(--bg-2));
  display: grid;
  place-items: center;
}

.login-shell {
  width: min(1100px, 92vw);
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 28px;
  align-items: center;
}

.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 42px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.brand-mark {
  font-family: "Rajdhani", sans-serif;
  font-size: 32px;
  letter-spacing: 0.22em;
  font-weight: 700;
}

.brand-sub {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 12px;
}

.tagline {
  margin: 18px 0 28px;
  color: var(--muted);
  line-height: 1.7;
}

.login-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn {
  border-radius: 999px;
  border: none;
  padding: 14px 22px;
  font-weight: 600;
  font-family: "Rajdhani", sans-serif;
  letter-spacing: 0.08em;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), #2f79ff);
  color: #0b0b12;
  box-shadow: 0 16px 35px rgba(77, 209, 255, 0.28);
}

.hint {
  font-size: 12px;
  color: var(--muted);
}

.login-footer {
  margin-top: 26px;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.login-visual {
  position: relative;
  min-height: 360px;
  display: grid;
  place-items: center;
}

.pulse {
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 209, 255, 0.35), transparent 60%);
  animation: pulse 4s ease-in-out infinite;
}

.grid-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(77, 209, 255, 0.18), rgba(255, 191, 95, 0.1));
  filter: blur(6px);
  opacity: 0.7;
}

.panel {
  position: relative;
  padding: 26px;
  border-radius: 18px;
  background: rgba(10, 12, 24, 0.85);
  border: 1px solid var(--border);
  width: 80%;
}

.panel-title {
  font-family: "Rajdhani", sans-serif;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--accent-2);
}

.panel-body {
  margin-top: 12px;
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(0.98);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.08);
    opacity: 1;
  }
}

@media (max-width: 900px) {
  .login-shell {
    grid-template-columns: 1fr;
  }

  .login-visual {
    min-height: 240px;
  }
}