:root {
  --bg-deep: #06111f;
  --bg-mid: #0f2a3f;
  --bg-soft: #214f75;
  --glass: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.28);
  --text-main: #f4fbff;
  --text-muted: #b8d0e4;
  --accent: #55d1f5;
  --accent-strong: #13b3e8;
  --error: #ffd5da;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(1200px 700px at 12% 10%, rgba(85, 209, 245, 0.22), transparent 55%),
    radial-gradient(900px 600px at 92% 90%, rgba(34, 139, 199, 0.24), transparent 60%),
    linear-gradient(125deg, var(--bg-deep), var(--bg-mid) 48%, var(--bg-soft));
}

.shell {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  overflow: hidden;
}

.ambient-glow {
  position: absolute;
  width: clamp(300px, 42vw, 620px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(85, 209, 245, 0.45), transparent 70%);
  filter: blur(26px);
  animation: orbit 16s ease-in-out infinite;
}

.panel {
  position: relative;
  z-index: 1;
  width: min(440px, 100%);
  border-radius: 22px;
  border: 1px solid var(--glass-border);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.05));
  backdrop-filter: blur(16px) saturate(120%);
  box-shadow:
    0 20px 50px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  padding: clamp(1.2rem, 2vw, 2rem);
}

.panel-header {
  margin-bottom: 1.2rem;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.panel-header h1 {
  margin: 0;
  font-size: clamp(1.6rem, 2.2vw, 2rem);
  letter-spacing: 0.01em;
}

.login-form {
  display: grid;
  gap: 0.65rem;
}

.login-form label {
  font-size: 0.82rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.login-form input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  color: var(--text-main);
  background: rgba(8, 22, 35, 0.46);
  font-size: 1rem;
  padding: 0.75rem 0.85rem;
  outline: none;
  transition: border-color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.login-form input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(85, 209, 245, 0.22);
  background: rgba(8, 22, 35, 0.62);
}

.form-error {
  margin: 0.2rem 0 0;
  color: var(--error);
  font-size: 0.9rem;
}

.login-form button {
  margin-top: 0.4rem;
  border: 0;
  border-radius: 12px;
  padding: 0.78rem 1rem;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  font-weight: 700;
  text-transform: uppercase;
  color: #082031;
  background: linear-gradient(140deg, #7ce7ff, var(--accent-strong));
  cursor: pointer;
  transition: transform 180ms ease, filter 180ms ease;
}

.login-form button:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.login-form button:disabled {
  cursor: default;
  opacity: 0.75;
  transform: none;
}

.session-caption {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.session-username {
  margin: 0.4rem 0 0;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.session-actions {
  margin-top: 1.2rem;
  display: grid;
  gap: 0.65rem;
}

.primary-action,
.secondary-action {
  border-radius: 12px;
  padding: 0.78rem 1rem;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  font-weight: 700;
  text-transform: uppercase;
  transition: transform 180ms ease, filter 180ms ease;
}

.primary-action {
  border: 0;
  display: inline-flex;
  justify-content: center;
  text-decoration: none;
  color: #082031;
  background: linear-gradient(140deg, #7ce7ff, var(--accent-strong));
}

.secondary-action {
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: var(--text-main);
  background: rgba(8, 22, 35, 0.4);
  cursor: pointer;
}

.primary-action:hover,
.secondary-action:hover {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.secondary-action:disabled {
  cursor: default;
  opacity: 0.75;
  transform: none;
}

@media (max-width: 640px) {
  .panel {
    border-radius: 18px;
    padding: 1.1rem;
  }
}

@keyframes orbit {
  0% {
    transform: translate(-35%, -25%) scale(0.95);
  }
  50% {
    transform: translate(30%, 25%) scale(1.06);
  }
  100% {
    transform: translate(-35%, -25%) scale(0.95);
  }
}