:root {
  --bg-deep: #eef2f6;
  --bg-panel: #ffffff;
  --bg-field: #f7f9fc;
  --line: #d5dde7;
  --text: #1a2330;
  --muted: #5c6b7c;
  --accent: #0d9f92;
  --accent-hover: #0b8a7f;
  --danger: #d6455a;
  --shadow: 0 16px 40px rgba(26, 35, 48, 0.08);
  --radius: 14px;
  --font-display: "Outfit", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg-deep);
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
}

.auth-visual {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 55% at 20% 80%, rgba(58, 123, 213, 0.18), transparent 55%),
    radial-gradient(ellipse 55% 45% at 85% 20%, rgba(114, 192, 72, 0.16), transparent 50%),
    linear-gradient(145deg, #e8f0f7 0%, #f2f6f4 45%, #f7faf8 100%);
  display: flex;
  align-items: flex-end;
  padding: 3.5rem;
}

.visual-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 35, 48, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 35, 48, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45), transparent 85%);
}

.visual-copy {
  position: relative;
  z-index: 1;
  max-width: 28rem;
}

.brand-logo {
  display: block;
  width: min(180px, 42vw);
  height: auto;
  margin: 0 0 1.25rem;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 18px 40px rgba(26, 35, 48, 0.1);
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--text);
}

.tagline {
  margin: 0.85rem 0 0;
  color: #3d5a6c;
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 1.6vw, 1.05rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.35;
}

.auth-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: var(--bg-panel);
  border-left: 1px solid var(--line);
}

.auth-form {
  width: min(100%, 380px);
  animation: rise-in 0.55s ease-out both;
}

.form-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.form-header p {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.form-error {
  margin-top: 1.25rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid rgba(214, 69, 90, 0.35);
  border-radius: 10px;
  background: rgba(214, 69, 90, 0.08);
  color: #b53648;
  font-size: 0.9rem;
  animation: shake 0.35s ease-in-out;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.field input {
  width: 100%;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-field);
  color: var(--text);
  font: 500 1rem var(--font-body);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input::placeholder {
  color: #8a97a6;
}

.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(13, 159, 146, 0.18);
}

.auth-shell .btn-primary {
  width: 100%;
  margin-top: 1.75rem;
  padding: 0.95rem 1rem;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.auth-shell .btn-primary:hover {
  background: var(--accent-hover);
}

.auth-shell .btn-primary:active {
  transform: translateY(1px);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes grid-drift {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(48px);
  }
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

@media (max-width: 860px) {
  .auth-shell {
    grid-template-columns: 1fr;
  }

  .auth-visual {
    min-height: 32vh;
    padding: 2rem;
  }

  .auth-panel {
    border-left: none;
    border-top: 1px solid var(--line);
    align-items: flex-start;
    padding-top: 2.5rem;
  }
}