:root {
  --bg: #eef4ff;
  --bg-2: #f8fbff;
  --surface: rgba(255, 255, 255, 0.98);
  --surface-strong: #ffffff;
  --border: #d7e1ef;
  --border-strong: #c3d2e6;
  --text: #122033;
  --muted: #5a6b82;
  --soft: #7b8ba1;
  --primary: #2357d6;
  --primary-2: #3d63dd;
  --primary-shadow: rgba(35, 87, 214, 0.22);
  --danger-bg: #fff2f4;
  --danger-border: #f3c4ce;
  --danger-text: #b0244f;
  --success-bg: #eefcf4;
  --success-border: #bae6cb;
  --success-text: #13744a;
  --info-bg: #eff6ff;
  --info-border: #bfd7ff;
  --info-text: #194faf;
  --shadow: 0 18px 42px rgba(18, 32, 51, 0.10);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 14px;
}

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

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 12%, rgba(78, 108, 255, 0.10), transparent 26%),
    radial-gradient(circle at 85% 10%, rgba(26, 114, 255, 0.08), transparent 24%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  display: grid;
  place-items: center;
  padding: 28px 18px;
  box-sizing: border-box;
}

.login-shell {
  width: 100%;
  max-width: 520px;
}

.login-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 30px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  background: #edf4ff;
  color: #194faf;
  border: 1px solid #cfe0ff;
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

h1 {
  margin: 16px 0 10px;
  font-size: clamp(30px, 4vw, 36px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

label {
  display: block;
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.field {
  width: 100%;
  box-sizing: border-box;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--surface-strong);
  padding: 14px 16px;
  color: var(--text);
  margin-bottom: 16px;
  font-size: 16px;
  line-height: 1.35;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.field:hover {
  border-color: #a9bfdc;
}

.field:focus {
  outline: none;
  border-color: rgba(35, 87, 214, 0.72);
  box-shadow: 0 0 0 4px rgba(35, 87, 214, 0.14);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  border: 0;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #fff;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 16px 30px var(--primary-shadow);
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 20px 34px rgba(35, 87, 214, 0.28);
}

.button:focus-visible,
.text-link:focus-visible {
  outline: 2px solid rgba(35, 87, 214, 0.72);
  outline-offset: 3px;
}

.error-box,
.success-box,
.note-box {
  border-radius: 18px;
  padding: 13px 15px;
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.55;
  border: 1px solid transparent;
}

.error-box {
  border-color: var(--danger-border);
  background: var(--danger-bg);
  color: var(--danger-text);
}

.success-box {
  border-color: var(--success-border);
  background: var(--success-bg);
  color: var(--success-text);
}

.note-box {
  border-color: var(--info-border);
  background: var(--info-bg);
  color: var(--info-text);
}

.note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--soft);
}

.link-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.text-link {
  color: #194faf;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
}

.text-link:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  body {
    padding: 18px 12px;
  }

  .login-card {
    padding: 22px 18px;
    border-radius: 22px;
  }

  h1 {
    font-size: 29px;
  }
}