/* =================================================================
// styles.css - Eulark 生电服务器官网
// 版本: v4.0 - 自适应深/浅色模式 & 蓝调主题
// 特性:
// 1. 使用 CSS 变量 (Custom Properties) 统一管理颜色方案。
// 2. 通过 @media (prefers-color-scheme: dark) 实现自动深/浅色模式切换。
// 3. 移除背景图片，采用纯色背景，加载速度更快。
// 4. 全新的蓝调 (#3F51B5) 主题，更具科技感和专业性。
// ================================================================= */

/* --- 1. 颜色和主题变量定义 --- */
:root {
    /* 主题色调 (蓝调) */
    --theme-color: #3F51B5; /* 经典深蓝 */
    --theme-color-dark: #303F9F; /* 更深的蓝色 */
    --theme-color-light: #42A5F5; /* 活力浅蓝 */
    --theme-color-faded-strong: rgba(63, 81, 181, 0.4);
    --theme-color-faded: rgba(63, 81, 181, 0.1);

    /* 浅色模式 (默认) */
    --bg-color: #ffffff;
    --text-color: #212121;
    --text-color-secondary: #757575;
    --header-bg-color: rgba(255, 255, 255, 0.85);
    --card-bg-color: #f5f5f5;
    --input-bg-color: #eeeeee;
    --border-color: #e0e0e0;
    --link-color: var(--theme-color);
}

/* 深色模式变量覆盖 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #121212;
        --text-color: #e0e0e0;
        --text-color-secondary: #bdc3c7;
        --header-bg-color: rgba(27, 27, 27, 0.85);
        --card-bg-color: #1E1E1E;
        --input-bg-color: #2c2c2c;
        --border-color: #333;
        --link-color: var(--theme-color-light); /* 深色模式下使用浅蓝色链接，对比度更高 */
    }
}

/* --- 2. 重置和基础样式 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

/* --- 3. 导航栏样式 --- */
header {
    background: var(--header-bg-color);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--theme-color-faded-strong);
    transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-logo a {
    color: var(--theme-color);
    text-decoration: none;
    font-size: 1.6rem;
    font-weight: bold;
    text-shadow: 0 0 10px var(--theme-color-faded-strong);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    text-transform: uppercase;
    font-size: 0.9rem;
    padding: 5px 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--theme-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.menu-toggle { display: none; flex-direction: column; cursor: pointer; gap: 5px; }
.bar { width: 25px; height: 3px; background: var(--text-color); border-radius: 2px; transition: all 0.3s ease; }

/* --- 4. 英雄区域 --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 20px 0;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--theme-color);
}

.hero-content .hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-color-secondary);
}

.server-status-container {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    background: var(--card-bg-color);
    padding: 10px 20px;
    border-radius: 25px;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.server-status { display: flex; align-items: center; gap: 8px; }
.status-dot { width: 12px; height: 12px; border-radius: 50%; }
.server-status.online .status-dot { background-color: #2ecc71; box-shadow: 0 0 8px #2ecc71; }
.server-status.offline .status-dot { background-color: #e74c3c; }

.cta-button {
    background: linear-gradient(45deg, var(--theme-color), var(--theme-color-dark));
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-transform: uppercase;
    font-weight: bold;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px var(--theme-color-faded-strong);
}

/* --- 5. 通用分区样式 --- */
section {
    padding: 80px 0;
}

section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--theme-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

/* --- 6. "关于"、"规则"、"指令" 等区域 --- */
.about, .rules-preview, .commands, .contact, .checkin {
    border-top: 1px solid var(--border-color);
}

.about-content { display: grid; grid-template-columns: 2fr 1fr; gap: 3rem; align-items: center; }
.about-text p { font-size: 1.1rem; margin-bottom: 1rem; color: var(--text-color-secondary); }
.minecraft-list { list-style: none; padding-left: 0; }
.minecraft-list li { margin-bottom: 0.5rem; display: flex; align-items: center; gap: 10px; }
.minecraft-list .fa-check { color: var(--theme-color); }
.about-image { text-align: center; font-size: 10rem; color: var(--theme-color-faded-strong); }

.server-specs {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--card-bg-color);
    border-radius: 10px;
    border: 1px solid var(--border-color);
}
.server-specs h4 { color: var(--theme-color); margin-bottom: 1.5rem; text-align: center; font-size: 1.3rem; }
.specs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1rem; }
.spec-item { display: flex; flex-direction: column; align-items: center; padding: 1rem; background: var(--bg-color); border-radius: 8px; border: 1px solid var(--border-color); }
.spec-item i { font-size: 1.8rem; color: var(--theme-color); margin-bottom: 0.5rem; }
.spec-label { font-size: 0.9rem; color: var(--text-color-secondary); margin-bottom: 0.3rem; }
.spec-value { font-size: 1rem; color: var(--text-color); font-weight: 500; text-align: center;}

.rules-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; margin-bottom: 3rem; }
.rule-card { background: var(--card-bg-color); padding: 2rem; border-radius: 15px; text-align: center; border: 1px solid var(--border-color); transition: transform 0.3s ease, box-shadow 0.3s ease; position: relative; }
.rule-card:hover { transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
.rule-icon { font-size: 3rem; color: var(--theme-color); margin-bottom: 1rem; }
.rule-card h3 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--theme-color); }
.rule-card p { color: var(--text-color-secondary); }
.rules-cta { text-align: center; }

.cta-button.secondary { background: transparent; border: 2px solid var(--theme-color); color: var(--theme-color); }
.cta-button.secondary:hover { background: var(--theme-color); color: white; }

.commands-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.command-category { background: var(--card-bg-color); padding: 2rem; border-radius: 10px; border: 1px solid var(--border-color); position: relative; }
.command-category h3 { color: var(--theme-color); margin-bottom: 1.5rem; font-size: 1.3rem; display: flex; align-items: center; gap: 0.5rem; }
.command-list { display: flex; flex-direction: column; gap: 1rem; }
.command-item { display: flex; flex-direction: column; padding: 1rem; background: var(--bg-color); border-radius: 8px; transition: background 0.3s ease; border: 1px solid var(--border-color); }
.command-item:hover { background: var(--theme-color-faded); }
.command-item code { background: var(--theme-color-faded); color: var(--theme-color); padding: 0.3rem 0.6rem; border-radius: 4px; font-family: 'Courier New', monospace; font-size: 0.9rem; margin-bottom: 0.5rem; border: 1px solid var(--theme-color-faded-strong); }
.command-item span { color: var(--text-color-secondary); font-size: 0.9rem; }

.contact-form { max-width: 600px; margin: 0 auto; display: flex; flex-direction: column; gap: 1.5rem; }
.contact-form textarea { padding: 15px; border: 2px solid var(--border-color); border-radius: 8px; background: var(--input-bg-color); color: var(--text-color); font-size: 1rem; transition: border-color 0.3s; }
.contact-form textarea:focus { border-color: var(--theme-color); outline: none; }
.contact-form textarea::placeholder { color: var(--text-color-secondary); }

/* --- 7. 页脚 --- */
.footer { background: var(--card-bg-color); padding: 2rem 0; text-align: center; border-top: 2px solid var(--theme-color); }
.footer p { margin-bottom: 1rem; }
.social-links { display: flex; justify-content: center; gap: 1rem; }
.social-links a { color: var(--theme-color); font-size: 1.5rem; transition: color 0.3s ease, transform 0.3s ease; }
.social-links a:hover { color: var(--theme-color-dark); transform: scale(1.1); }

/* --- 8. 登录/注册页面 & 表单样式 --- */
.login-container { background: var(--card-bg-color); backdrop-filter: blur(10px); border: 1px solid var(--border-color); border-radius: 15px; padding: 2.5rem 3rem; box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1); max-width: 450px; margin: 0 auto; }
.login-container h2 { text-align: center; color: var(--theme-color); margin-bottom: 2rem; font-size: 2rem; font-weight: bold; display: flex; align-items: center; justify-content: center; gap: 0.8rem; }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--text-color-secondary); font-size: 0.9rem; display: flex; align-items: center; gap: 0.5rem; }
.login-form input { width: 100%; padding: 12px 15px; background: var(--input-bg-color); border: 2px solid var(--border-color); border-radius: 8px; color: var(--text-color); font-size: 1rem; transition: all 0.3s ease; }
.login-form input:focus { outline: none; border-color: var(--theme-color); box-shadow: 0 0 15px var(--theme-color-faded-strong); }
.message { font-weight: bold; padding: 10px; border-radius: 5px; text-align: center; }
.login-container p { text-align: center; margin-top: 1.5rem; color: var(--text-color-secondary); }
.login-container p a:hover { text-decoration: underline; }

/* --- 9. 特殊组件样式 (用户信息, 签到等) --- */
.user-info-pill { display: flex; align-items: center; background-color: var(--theme-color-faded); border-radius: 20px; padding: 5px 12px; gap: 8px; font-weight: 500; font-size: 0.9rem; }
.user-info-pill .fa-user-circle { color: var(--theme-color); font-size: 1.2em; }
.logout-btn-small { background: none; border: none; color: #e74c3c; cursor: pointer; font-size: 1rem; padding: 5px; margin-left: 5px; transition: color 0.3s ease; }
.logout-btn-small:hover { color: #ff6b6b; }

.checkin-content { background: var(--card-bg-color); border-radius: 15px; padding: 2rem; max-width: 500px; margin: 0 auto; text-align: center; border: 1px solid var(--border-color); }
.score-display { font-size: 1.5rem; margin-bottom: 1.5rem; }
#player-score-display { color: var(--theme-color); font-weight: bold; }
#checkin-btn { width: 100%; max-width: 250px; margin: 0 auto; }
#checkin-message { margin-top: 1.5rem; font-weight: bold; min-height: 24px; }

/* --- 10. 自定义表单按钮样式 --- */
.login-form .minecraft-btn,
.contact-form .minecraft-btn {
    background: var(--bg-color);
    color: var(--theme-color);
    border: 2px solid var(--theme-color);
    border-radius: 50px;
    width: 100%;
    padding: 13px;
    font-weight: bold;
    font-size: 1.1rem;
    text-shadow: none;
    transition: all 0.3s ease;
}
.login-form .minecraft-btn:hover,
.contact-form .minecraft-btn:hover {
    background-color: var(--theme-color);
    color: var(--bg-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px var(--theme-color-faded-strong);
}

/* --- 11. 动画和响应式设计 --- */
.hero-content h1, .hero-subtitle, .server-status-container, 
.about h2, .about-text, .about-image, 
.rules-preview h2, .rule-card, 
.commands h2, .command-category, 
.contact h2, .contact-form {
    opacity: 0;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.cta-button { opacity: 0; transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.hero-content h1 { transform: translateX(-30px); }
.hero-subtitle { transform: translateY(-20px); transition-delay: 0.2s; }
.server-status-container { transform: scale(0.8); transition-delay: 0.4s; }
.cta-button { transform: translateY(30px); transition-delay: 0.6s; }
.about h2, .rules-preview h2, .commands h2, .contact h2 { transform: translateY(30px); }
.about-text { transform: translateX(-30px); }
.about-image { transform: translateX(30px); }
.rule-card, .command-category, .contact-form { transform: translateY(30px); }
.hero-content h1.animate, .hero-subtitle.animate, .cta-button.animate, .server-status-container.animate,
.about h2.animate, .about-text.animate, .about-image.animate,
.rules-preview h2.animate, .rule-card.animate,
.commands h2.animate, .command-category.animate,
.contact h2.animate, .contact-form.animate {
    opacity: 1;
    transform: none;
}

@media (max-width: 768px) {
    section { padding: 60px 0; }
    section h2 { font-size: 2rem; }
    .nav-menu { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%; background: var(--header-bg-color); padding: 1rem 0; gap: 0; }
    .nav-menu.active { display: flex; }
    .nav-item { width: 100%; text-align: center; }
    .nav-link { display: block; padding: 1rem 0; }
    .nav-link::after { display: none; }
    .menu-toggle { display: flex; }
    .menu-toggle.active .bar:nth-child(1) { transform: rotate(-45deg) translate(-5px, 6px); }
    .menu-toggle.active .bar:nth-child(2) { opacity: 0; }
    .menu-toggle.active .bar:nth-child(3) { transform: rotate(45deg) translate(-5px, -6px); }
    .hero-content h1 { font-size: 2.5rem; }
    .hero-content .hero-subtitle { font-size: 1.2rem; }
    .server-status-container { flex-direction: column; gap: 10px; }
    .about-content { grid-template-columns: 1fr; text-align: center; }
    .about-text { order: 2; }
    .about-image { order: 1; font-size: 8rem; }
    .specs-grid { grid-template-columns: repeat(2, 1fr); }
    .rules-grid, .commands-content { grid-template-columns: 1fr; }
    .login-container { padding: 2rem 1.5rem; }
}

/* --- 12. 其他页面微调 (确保颜色变量生效) --- */
.dashboard-header h1 { color: var(--theme-color); }
.tab-btn.active { color: var(--theme-color); }
.tab-btn.active::after { background-color: var(--theme-color); }
.message-table th { background: var(--theme-color-faded); }

.sponsors-header h1 { color: #ffd700; } /* 赞助页的金色标题可以保留，作为特色 */
.donation-section { border: 2px solid rgba(255, 215, 0, 0.3); }
.donation-section h2 { color: #ffd700; }
.sponsors-list { border: 2px solid rgba(255, 215, 0, 0.2); }
.sponsors-header-row { color: #ffd700; background: rgba(255, 215, 0, 0.1); }
.sponsor-number { color: #ffd700; }

.shop-header h1 { color: #ffd700; } /* 商城页也可以保留金色 */
#current-score { color: #ffd700; }
.item-price { color: #ffd700; }

.banned-header h2 { color: #e74c3c; } /* 封禁墙保留红色，警示作用 */
.banned-stats .stat-number { color: #e74c3c; }
.banned-item-header { color: #e74c3c; background: rgba(231, 76, 60, 0.1); }