/* ========================================
   管理后台登录页 - PC 适配
   ======================================== */

:root {
  --primary: #f59e0b; --primary-dark: #d97706;
  --bg: #1c1917; --card-bg: #292524;
  --text: #e7e5e4; --text-secondary: #a8a29e;
  --border: #44403c; --error: #ef4444;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: radial-gradient(ellipse at center, #292524 0%, #1c1917 70%);
}

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

.login-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
  border: 1px solid var(--border);
}

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

.login-header .logo { font-size: 48px; display: block; margin-bottom: 12px; }

.login-header h1 {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.login-header p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* 表单 */
.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 14px;
  font-size: 16px;
  pointer-events: none;
}

.input-wrap input {
  width: 100%;
  padding: 13px 14px 13px 42px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: var(--font);
  color: #fff;
  background: #1c1917;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-wrap input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(245,158,11,0.15);
}

.input-wrap input::placeholder { color: #57534e; }

.toggle-pwd {
  position: absolute;
  right: 14px;
  font-size: 16px;
  cursor: pointer;
  user-select: none;
  opacity: 0.5;
  transition: opacity 0.15s;
}
.toggle-pwd:hover { opacity: 0.8; }

.error-msg {
  color: var(--error);
  font-size: 13px;
  min-height: 20px;
  margin-bottom: 8px;
  text-align: center;
}

.btn-login {
  display: block;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #1c1917;
  transition: opacity 0.2s, transform 0.1s;
  margin-top: 8px;
}

.btn-login:hover { opacity: 0.9; }
.btn-login:active { transform: scale(0.98); }
.btn-login:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.footer-text {
  text-align: center;
  font-size: 11px;
  color: #57534e;
  margin-top: 24px;
}