:root {
  color-scheme: dark;
  --bg: #07111e;
  --bg-accent: #11324d;
  --surface: rgba(8, 24, 42, 0.8);
  --surface-strong: rgba(7, 18, 31, 0.96);
  --border: rgba(126, 191, 255, 0.24);
  --text: #f4f8ff;
  --muted: #9fb8d3;
  --highlight: #79d4ff;
  --highlight-strong: #b7f37d;
  --danger: #ff8e8e;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --radius-xl: 28px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --transition: 180ms ease;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(107, 215, 255, 0.22), transparent 38%),
    radial-gradient(circle at bottom right, rgba(183, 243, 125, 0.14), transparent 35%),
    linear-gradient(135deg, var(--bg), #050b14 52%, var(--bg-accent));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 92%);
}

.page-shell {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
}

.brand-panel,
.login-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.brand-panel {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 44px;
  background:
    linear-gradient(180deg, rgba(121, 212, 255, 0.11), transparent 40%),
    linear-gradient(145deg, rgba(9, 30, 51, 0.88), rgba(6, 16, 28, 0.96));
}

.brand-panel h1 {
  margin: 12px 0 14px;
  font-size: clamp(3.4rem, 11vw, 7rem);
  line-height: 0.92;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-copy,
.panel-copy {
  max-width: 28rem;
  color: var(--muted);
  line-height: 1.6;
}

.brand-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.brand-grid span {
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(121, 212, 255, 0.22);
  background:
    linear-gradient(160deg, rgba(121, 212, 255, 0.18), transparent),
    rgba(255, 255, 255, 0.03);
  animation: drift 8s ease-in-out infinite;
}

.brand-grid span:nth-child(2) {
  animation-delay: 1.5s;
}

.brand-grid span:nth-child(3) {
  animation-delay: 2.4s;
}

.brand-grid span:nth-child(4) {
  animation-delay: 3.3s;
}

.login-panel {
  width: min(100%, 520px);
  padding: 40px;
  background:
    linear-gradient(180deg, rgba(183, 243, 125, 0.08), transparent 24%),
    var(--surface-strong);
}

.panel-header {
  margin-bottom: 30px;
}

.panel-header h2 {
  margin: 10px 0 12px;
  font-size: clamp(2rem, 5vw, 3rem);
}

.eyebrow {
  margin: 0;
  color: var(--highlight-strong);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.75rem;
  font-weight: 700;
}

.login-form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 9px;
}

.field span {
  font-size: 0.95rem;
  color: #d7e7f7;
}

.field input {
  width: 100%;
  border: 1px solid rgba(126, 191, 255, 0.18);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text);
  padding: 16px 18px;
  font: inherit;
  transition:
    border-color var(--transition),
    transform var(--transition),
    background var(--transition);
}

.field input::placeholder {
  color: #7390ad;
}

.field input:focus {
  outline: none;
  border-color: var(--highlight);
  background: rgba(11, 29, 49, 0.96);
  transform: translateY(-1px);
}

.form-message {
  min-height: 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.form-message[data-state="error"] {
  color: var(--danger);
}

.form-message[data-state="success"] {
  color: var(--highlight-strong);
}

.submit-button {
  border: 0;
  border-radius: 999px;
  padding: 16px 22px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #041019;
  background:
    linear-gradient(135deg, var(--highlight-strong), #6ce6ff);
  cursor: pointer;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    opacity var(--transition);
  box-shadow: 0 16px 35px rgba(121, 212, 255, 0.22);
}

.submit-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 38px rgba(121, 212, 255, 0.28);
}

.submit-button:disabled {
  opacity: 0.65;
  cursor: progress;
  transform: none;
}

@keyframes drift {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

@media (max-width: 920px) {
  .page-shell {
    padding: 20px;
  }

  .brand-panel,
  .login-panel {
    padding: 28px;
  }

  .brand-panel {
    min-height: 280px;
  }
}