/* 2026 SaaS Auth UI - 纯净电脑版 (已移除手机适配) */

/* --- 1. 全局重置 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    width: 100%;
    padding-top: 0px;
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-body); /* 继承主色调 */
}

/* --- 2. 全屏容器 (Flexbox 居中核心) --- */
.auth-container {
    min-height: 100vh;      /* 确保至少占满一屏 */
    width: 100%;
    display: flex;          /* 启用 Flex 布局 */
    align-items: center;    /* 垂直居中 */
    justify-content: center;/* 水平居中 */
    padding: 20px;
    background: var(--bg-body);
    transition: background 0.3s;
}

/* --- 3. 认证卡片 --- */
.auth-box {
    width: 100%;
    max-width: 420px;       /* 固定宽度，保持精致感 */
    background: var(--bg-card);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    text-align: center;
    position: relative;
    z-index: 10;
    
    /* 动画效果：轻微浮入 */
    animation: fadeInUp 0.5s ease-out;
}

/* --- 内部元素样式 --- */

/* 标题区域 */
.auth-header { margin-bottom: 25px; }
.auth-logo { height: 48px; margin-bottom: 15px; display: block; margin-left: auto; margin-right: auto; }
.auth-title { font-size: 22px; font-weight: 800; color: var(--text-main); margin-bottom: 5px; }
.auth-subtitle { font-size: 13px; color: var(--text-sub); }

/* 表单组 */
.auth-form { text-align: left; }
.form-group { margin-bottom: 18px; position: relative; }
.form-label { display: block; font-size: 13px; font-weight: 600; color: var(--text-sub); margin-bottom: 6px; }

/* 输入框 */
.auth-input {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 10px; /* 更圆润 */
    color: var(--text-main);
    font-size: 15px; 
    outline: none;
    transition: 0.2s;
}
.auth-input:focus {
    background: var(--bg-card);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}
.auth-input:invalid:not(:placeholder-shown) { border-color: #ef4444; }

/* 密码强度条 */
.password-strength { height: 4px; background: var(--border-color); margin-top: 8px; border-radius: 2px; overflow: hidden; display: flex; }
.strength-bar { height: 100%; width: 0%; transition: width 0.3s, background-color 0.3s; }
.strength-text { font-size: 11px; text-align: right; margin-top: 4px; color: var(--text-sub); }
.strength-weak { width: 33%; background-color: #ef4444; }
.strength-medium { width: 66%; background-color: #f59e0b; }
.strength-strong { width: 100%; background-color: #10b981; }

/* 按钮与底部 */
.auth-btn {
    width: 100%; padding: 12px;
    background: var(--primary); color: #fff;
    border: none; border-radius: 10px;
    font-size: 14px; font-weight: 600;
    cursor: pointer; transition: 0.2s; margin-top: 10px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}
.auth-btn:hover { background: var(--primary-hover); transform: translateY(-1px); }

.auth-footer { margin-top: 25px; font-size: 13px; color: var(--text-sub); }
.auth-link { color: var(--primary); text-decoration: none; font-weight: 600; }
.auth-link:hover { text-decoration: underline; }

.auth-alert {
    background: rgba(239, 68, 68, 0.1); color: #ef4444;
    padding: 12px; border-radius: 8px; font-size: 13px;
    margin-bottom: 20px; border: 1px solid rgba(239, 68, 68, 0.2); text-align: left;
}

/* 记住我 */
.auth-actions { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; font-size: 13px; color: var(--text-sub); }
.auth-checkbox { accent-color: var(--primary); cursor: pointer; margin-right: 5px; transform: scale(1.1); }

/* 动画定义 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- 验证码输入框组合样式 --- */
.input-group {
    display: flex;
    gap: 10px;
}
.input-group .auth-input {
    flex: 1; /* 输入框占满剩余空间 */
}
.btn-code {
    padding: 0 15px;
    background: var(--bg-hover);
    color: var(--primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
    transition: 0.2s;
    width: 110px; /* 固定宽度防止倒计时抖动 */
}
.btn-code:hover:not(:disabled) {
    background: var(--bg-card);
    border-color: var(--primary);
}
.btn-code:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    color: var(--text-sub);
}