/*
 * File: css/common.css
 * Description: 全局通用样式、变量、Reset和基础布局。
 */
:root {
    --color-primary: #007bff; /* 蓝色主题 */
    --color-secondary: #6c757d;
    --color-text: #333;
    --color-bg-light: #f8f9fa;
    --color-white: #fff;
    --color-hover-bg: #e9ecef;
    --color-glow: #17a2b8; /* 科技感光晕色 */
    --transition-speed: 0.3s;
    --header-height: 65px; 
    --dynamic-bar-height: 40px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Microsoft YaHei", "PingFang SC";
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.6;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed), background-color var(--transition-speed), box-shadow var(--transition-speed);
}

a:hover {
    color: #0056b3;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* 布局容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮基础样式 */
.btn {
    padding: 10px 20px;
    border: 1px solid var(--color-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition-speed);
    display: inline-block;
    text-align: center;
}

.btn-login {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-login:hover {
    background-color: var(--color-hover-bg);
}

.btn-register {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}
.btn-register:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.btn-primary-lg {
    padding: 12px 30px;
    font-size: 18px;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.3);
}
.btn-primary-lg:hover {
    background-color: #0056b3;
    box-shadow: 0 6px 15px rgba(0, 123, 255, 0.4);
}

.btn-secondary-lg {
    padding: 12px 30px;
    font-size: 18px;
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}
.btn-secondary-lg:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* 科技感光晕效果 */
.tech-glow {
    text-shadow: 0 0 10px rgba(23, 162, 184, 0.7);
}