/**
 * 登录页面样式
 */

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

:root {
  --primary: #667eea;
  --primary-dark: #5a67d8;
  --secondary: #764ba2;
  --success: #10b981;
  --danger: #ef4444;
  --bg: #ffffff;
  --bg-light: #f8fafc;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-light: #64748b;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
  width: 400px;
  height: 520px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei',
    sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  overflow: hidden;
}

/* ========== 背景 ========== */
.login-page {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.background-wrapper {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.gradient-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.9;
  }
}

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.3;
  animation: float 15s ease-in-out infinite;
}

.shape-1 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, #fff 0%, transparent 70%);
  top: -10%;
  left: -15%;
  animation-delay: 0s;
}

.shape-2 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, #fff 0%, transparent 70%);
  top: 30%;
  right: -10%;
  animation-delay: -5s;
}

.shape-3 {
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, #fff 0%, transparent 70%);
  bottom: -10%;
  left: 20%;
  animation-delay: -10s;
}

@keyframes float {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  25% {
    transform: translate(20px, -20px) scale(1.1);
  }
  50% {
    transform: translate(-15px, 15px) scale(0.9);
  }
  75% {
    transform: translate(-20px, -15px) scale(1.05);
  }
}

/* ========== 登录内容 ========== */
.login-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px 40px;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== 品牌区域 ========== */
.brand-section {
  text-align: center;
  margin-bottom: 30px;
  color: white;
}

.logo {
  width: 70px;
  height: 70px;
  margin: 0 auto 16px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(20px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  animation: logoPulse 3s ease-in-out infinite;
}

@keyframes logoPulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.subtitle {
  font-size: 14px;
  opacity: 0.95;
  font-weight: 500;
}

/* ========== 表单容器 ========== */
.form-container {
  width: 100%;
  max-width: 100%;
}

.login-form {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(40px);
  border-radius: 20px;
  padding: 28px 24px 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25), inset 0 0 40px rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* ========== 表单字段 ========== */
.form-field {
  margin-bottom: 20px;
}

.form-field label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-icon {
  width: 16px;
  height: 16px;
  color: var(--primary);
  stroke-width: 2;
}

.form-field input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  background: var(--bg-light);
  color: var(--text);
  transition: all 0.25s;
}

.form-field input:focus {
  outline: none;
  border-color: var(--primary);
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-field input::placeholder {
  color: var(--text-light);
}

/* ========== 选项 ========== */
.form-options {
  margin-bottom: 24px;
  display: flex;
  justify-content: flex-start;
}

.remember-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
}

.remember-checkbox input {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--primary);
}

/* ========== 登录按钮 ========== */
.login-button {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
}

.login-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.login-button:hover::before {
  width: 300px;
  height: 300px;
}

.login-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.login-button:active {
  transform: translateY(0);
}

.login-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.login-button span {
  position: relative;
  z-index: 1;
}

/* 加载状态 */
.login-button.loading {
  pointer-events: none;
}

.login-button.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========== 错误提示 ========== */
.error-message {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  border: 2px solid #fca5a5;
  border-radius: 10px;
  color: #991b1b;
  font-weight: 600;
  font-size: 13px;
  margin-top: 16px;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.error-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ========== 底部 ========== */
.form-footer {
  margin-top: 20px;
  text-align: center;
}

.version {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 600;
}