.login-body {
  display: grid;
  place-items: center;
  min-height: 100dvh;
  padding: 24px;
}

.login-shell {
  width: min(420px, 100%);
  animation: rise 600ms cubic-bezier(.2,.8,.2,1) both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.login-card {
  position: relative;
  padding: 40px 36px 28px;
  background: linear-gradient(180deg, rgba(22, 24, 36, 0.82), rgba(14, 16, 26, 0.82));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}
.login-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.6), rgba(34, 211, 238, 0.4) 45%, transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: 0.8;
}

.login-header { margin-bottom: 26px; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
}
.brand-mark {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.15), rgba(34, 211, 238, 0.1));
  border: 1px solid var(--border-strong);
  box-shadow: 0 0 0 1px rgba(124, 92, 255, 0.15) inset, 0 10px 30px -12px var(--accent-glow);
}
.brand-mark svg { width: 24px; height: 24px; }
.brand-name {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}
.brand-tagline {
  font-size: 12px;
  color: var(--text-mute);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.login-title {
  margin: 0 0 6px;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #fff, #c9ccdd);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.login-subtitle {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 8px;
}

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.field-control {
  position: relative;
  display: flex;
  align-items: center;
  background: rgba(10, 12, 20, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}
.field-control:focus-within {
  border-color: rgba(124, 92, 255, 0.55);
  background: rgba(14, 16, 26, 0.9);
  box-shadow: 0 0 0 4px rgba(124, 92, 255, 0.16);
}
.field-icon {
  display: grid; place-items: center;
  width: 44px; height: 48px;
  color: var(--text-mute);
}
.field-icon svg { width: 18px; height: 18px; }

.field-control input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: none;
  padding: 14px 8px;
  font-size: 15px;
  color: var(--text);
  letter-spacing: 0.02em;
}
.field-control input::placeholder {
  color: var(--text-mute);
  letter-spacing: 0.2em;
}

.field-toggle {
  background: transparent;
  border: 0;
  padding: 0 14px;
  height: 48px;
  display: grid; place-items: center;
  color: var(--text-mute);
  cursor: pointer;
  transition: color 160ms ease;
}
.field-toggle:hover { color: var(--text); }
.field-toggle svg { width: 18px; height: 18px; }

.btn-primary {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  height: 50px;
  margin-top: 6px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #fff;
  background: linear-gradient(135deg, #7c5cff 0%, #5c8cff 50%, #22d3ee 100%);
  background-size: 200% 200%;
  background-position: 0% 50%;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  overflow: hidden;
  transition: background-position 400ms ease, transform 120ms ease, box-shadow 200ms ease;
  box-shadow: 0 10px 30px -10px var(--accent-glow), 0 0 0 1px rgba(255,255,255,0.08) inset;
}
.btn-primary:hover { background-position: 100% 50%; }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: 0.75; cursor: progress; }
.btn-primary .btn-arrow { width: 18px; height: 18px; transition: transform 180ms ease; }
.btn-primary:hover .btn-arrow { transform: translateX(3px); }

.btn-spinner {
  display: none;
  width: 16px; height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}
.btn-primary.is-loading .btn-label,
.btn-primary.is-loading .btn-arrow { visibility: hidden; }
.btn-primary.is-loading .btn-spinner {
  display: inline-block;
  position: absolute;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-msg {
  min-height: 0;
  font-size: 13px;
  color: var(--danger);
  text-align: center;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 200ms ease, transform 200ms ease;
}
.error-msg.show {
  opacity: 1;
  transform: translateY(0);
  margin-top: -6px;
}

.login-footer {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-mute);
  font-family: var(--font-mono);
}
.login-footer .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.15);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.login-card.shake { animation: shake 360ms cubic-bezier(.36,.07,.19,.97); }
@keyframes shake {
  10%, 90% { transform: translateX(-2px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-6px); }
  40%, 60% { transform: translateX(6px); }
}