/* ── 登录页样式 ── */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --border: #e5e7eb;
  --error-bg: #fef2f2;
  --error-text: #dc2626;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  color: var(--text);
}

.login-container {
  width: 100%;
  max-width: 420px;
  padding: 20px;
}

.login-card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  padding: 40px 36px;
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.login-sub {
  font-size: 14px;
  color: var(--text-secondary);
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.form-group input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.form-hint {
  font-size: 11px;
  color: var(--text-secondary);
}

.login-error {
  background: var(--error-bg);
  color: var(--error-text);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.4;
}

.login-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 12px 0;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  margin-top: 4px;
}

.login-btn:hover {
  background: var(--primary-hover);
}

.login-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.login-footer {
  margin-top: 24px;
  text-align: center;
}

.login-footer p {
  font-size: 12px;
  color: var(--text-secondary);
}

/* ── 验证码 ── */
.captcha-row {
  display: flex;
  gap: 10px;
  align-items: center;
}

.captcha-row input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-width: 0;
}

.captcha-row input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.captcha-img {
  height: 42px;
  border-radius: var(--radius);
  cursor: pointer;
  flex-shrink: 0;
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}

.captcha-img:hover {
  border-color: var(--primary);
}

.captcha-hint {
  text-align: right;
}