:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --panel-muted: #f8fafc;
  --text: #303133;
  --regular: #606266;
  --border: #dcdfe6;
  --border-light: #ebeef5;
  --primary: #409eff;
  --primary-dark: #337ecc;
  --success: #67c23a;
  --danger: #f56c6c;
  --input: #ffffff;
  --sans: Arial, 'Microsoft YaHei', sans-serif;
  font: 14px/1.5 var(--sans);
  color: var(--text);
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
}

#app {
  min-height: 100svh;
}

h1,
h2,
p {
  margin: 0;
}

.login-page {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 22px;
  min-height: 100svh;
  overflow: hidden;
  background:
    linear-gradient(90deg, #d8e9ff 0 18%, transparent 18% 100%),
    linear-gradient(180deg, transparent 0 66%, #e8f3ff 66% 100%),
    var(--bg);
}

.login-page::before,
.login-page::after {
  content: '';
  position: absolute;
  display: block;
  pointer-events: none;
}

.login-page::before {
  width: 360px;
  height: 180px;
  top: 72px;
  right: 8%;
  filter: blur(2px);
  transform: rotate(-8deg);
  background:
    linear-gradient(90deg, #409eff 0 42%, transparent 42% 100%),
    linear-gradient(180deg, transparent 0 48%, #79bbff 48% 100%);
}

.login-page::after {
  width: 420px;
  height: 260px;
  left: 8%;
  bottom: 56px;
  filter: blur(3px);
  transform: rotate(10deg);
  background:
    linear-gradient(90deg, transparent 0 18%, #a0cfff 18% 60%, transparent 60% 100%),
    linear-gradient(180deg, #337ecc 0 34%, transparent 34% 100%);
}

.brand-panel,
.login-panel {
  position: relative;
}

.brand-panel {
  z-index: 1;
  color: var(--text);
}

.brand-panel h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
}

.login-panel {
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: min(420px, calc(100vw - 48px));
  padding: 40px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  background: var(--panel);
}

.panel-heading {
  margin-bottom: 24px;
}

.panel-heading h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.field span,
.field > label {
  color: var(--regular);
  font-size: 14px;
  font-weight: 500;
}

.field input,
.field select {
  width: 100%;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--input);
  color: var(--text);
  outline: none;
  padding: 0 12px;
}

.field input:focus,
.field select:focus {
  border-color: var(--primary);
}

.code-row {
  display: grid;
  grid-template-columns: 1fr 112px;
  gap: 10px;
  align-items: end;
}

.primary-button,
.secondary-button {
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-weight: 500;
}

.primary-button {
  margin-top: 4px;
  border-color: var(--primary);
  background: var(--primary);
  color: #ffffff;
}

.secondary-button {
  background: #ffffff;
  color: var(--text);
}

.primary-button:disabled,
.secondary-button:disabled {
  border-color: var(--border);
  background: #f5f7fa;
  color: #a8abb2;
}

.feedback {
  padding: 8px 10px;
  border: 1px solid var(--border-light);
  border-radius: 4px;
  background: var(--panel-muted);
  font-weight: 500;
}

.feedback.success {
  border-color: #b3e19d;
  color: var(--success);
}

.feedback.error {
  border-color: #fab6b6;
  color: var(--danger);
}

@media (max-width: 860px) {
  .login-page {
    justify-content: flex-start;
    padding-top: 64px;
  }

  .brand-panel {
    width: min(420px, calc(100vw - 48px));
  }

  .login-panel {
    padding: 24px;
  }
}

@media (max-width: 520px) {
  .code-row {
    grid-template-columns: 1fr;
  }

  .secondary-button {
    width: 100%;
  }
}