/* ============================================================
   Nekoha's Blog — Glassmorphism Theme
   参考 Hexo 毛玻璃主题 (yorukumo / aurora glass) 风格改造
   ============================================================ */

/* ================= 全局变量 ================= */
:root {
    /* 品牌色：保留原蓝色系，微调更通透 */
    --primary-color-light: #eef4ff;
    --primary-color-medium: #dbe7ff;
    --primary-color-dark: #b8cdf5;
    --accent-color: #4f8ef7;
    --accent-hover: #3b76e0;
    --accent-glow: rgba(79, 142, 247, 0.35);

    --text-color-primary: #1f2a44;
    --text-color-secondary: #5a6a8c;

    --border-radius: 18px;
    --border-radius-sm: 10px;

    /* 毛玻璃关键参数 */
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-bg-strong: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.65);
    --glass-blur: blur(20px) saturate(180%);

    --shadow: 0 8px 32px rgba(31, 60, 120, 0.10);
    --shadow-hover: 0 12px 40px rgba(79, 142, 247, 0.22);

    --button-bg: linear-gradient(135deg, #4f8ef7 0%, #7c5cf0 100%);
    --button-hover-bg: linear-gradient(135deg, #3b76e0 0%, #6a4ae0 100%);

    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-height: 64px;

    --owner-badge-bg: #ff4757;
    --owner-badge-text: #ffffff;
}

[data-theme="dark"] {
    --primary-color-light: #0d1225;
    --primary-color-medium: #161d3a;
    --primary-color-dark: #1f2a52;
    --accent-color: #6ea8ff;
    --accent-hover: #8bbcff;
    --accent-glow: rgba(110, 168, 255, 0.35);

    --text-color-primary: #e6ecff;
    --text-color-secondary: #8b9cc7;

    --glass-bg: rgba(28, 36, 68, 0.45);
    --glass-bg-strong: rgba(36, 46, 84, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);

    --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
    --shadow-hover: 0 12px 40px rgba(110, 168, 255, 0.18);
}

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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding-top: var(--nav-height);
    min-height: 100vh;
    position: relative;
    background: var(--primary-color-light);
    overflow-x: hidden;
}

/* ============================================================
   极光渐变背景层 —— 毛玻璃之所以"透"，全靠这层色彩在底下
   ============================================================ */
body::before,
body::after {
    content: '';
    position: fixed;
    width: 60vw;
    height: 60vw;
    border-radius: 50%;
    z-index: -1;
    pointer-events: none;
    filter: blur(80px);
    opacity: 0.55;
    animation: auroraFloat 22s ease-in-out infinite alternate;
}
body::before {
    top: -15vw; left: -15vw;
    background: radial-gradient(circle at center, #7aa8ff 0%, transparent 70%);
}
body::after {
    bottom: -20vw; right: -15vw;
    background: radial-gradient(circle at center, #c58aff 0%, #ff9ec7 0%, transparent 70%);
    animation-delay: -11s;
}

/* 加第三块光斑：用 body 直接的 box-shadow 不行，用一个隐藏的 background-image */
body {
    background-image:
        radial-gradient(circle at 85% 20%, rgba(255, 158, 199, 0.35) 0%, transparent 45%),
        radial-gradient(circle at 15% 85%, rgba(122, 230, 255, 0.30) 0%, transparent 45%);
    background-attachment: fixed;
}

[data-theme="dark"] body,
body[data-theme="dark"] {
    /* dark 模式下光斑更深邃 */
}
html[data-theme="dark"] body {
    background-color: #0d1225;
    background-image:
        radial-gradient(circle at 85% 15%, rgba(124, 92, 240, 0.45) 0%, transparent 50%),
        radial-gradient(circle at 10% 80%, rgba(79, 142, 247, 0.35) 0%, transparent 50%),
        radial-gradient(circle at 50% 100%, rgba(255, 158, 199, 0.20) 0%, transparent 50%);
}

@keyframes auroraFloat {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(5vw, 3vh) scale(1.1); }
    100% { transform: translate(-3vw, -4vh) scale(0.95); }
}

/* ================= 导航栏 ================= */
.top-nav {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--nav-height);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px;
    transition: background 0.3s ease;
}

.nav-brand {
    font-size: 1.3em; font-weight: bold; color: var(--accent-color);
    text-decoration: none; display: flex; align-items: center; gap: 8px;
    flex-shrink: 0; margin-right: 16px;
}
.nav-brand:hover { color: var(--accent-hover); text-decoration: none; }

.nav-links {
    display: flex; align-items: center; gap: 8px;
    overflow-x: auto; white-space: nowrap;
    scrollbar-width: none; -ms-overflow-style: none;
}
.nav-links::-webkit-scrollbar { display: none; }

.nav-link {
    color: var(--text-color-secondary); text-decoration: none;
    padding: 6px 14px; border-radius: var(--border-radius-sm);
    transition: var(--transition); font-size: 0.95em;
}
.nav-link:hover {
    background: rgba(255, 255, 255, 0.5);
    color: var(--accent-color);
    text-decoration: none;
}
html[data-theme="dark"] .nav-link:hover {
    background: rgba(255, 255, 255, 0.08);
}
.nav-link.active {
    background: var(--button-bg);
    color: white;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--glass-border);
    width: 40px; height: 40px; border-radius: 50%;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: var(--transition); font-size: 1.2em; color: var(--text-color-primary);
    margin-left: 8px;
}
html[data-theme="dark"] .theme-toggle {
    background: rgba(255, 255, 255, 0.08);
}
.theme-toggle:hover {
    background: var(--button-bg); color: white;
    transform: rotate(180deg);
    box-shadow: 0 4px 14px var(--accent-glow);
}

/* ================= 布局与卡片 ================= */
.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

.content-section {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 32px; margin-bottom: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: fadeInUp 0.5s ease;
}

.content-section:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-title {
    font-size: 1.6em;
    background: linear-gradient(135deg, var(--accent-color) 0%, #b06cff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--glass-border);
    display: flex; align-items: center; gap: 10px;
}

/* ================= 按钮与表单 ================= */
.btn, .ctrl-btn, .ping-btn, .action-btn, .minecraft-btn, .copy-btn {
    background: var(--button-bg);
    color: white; border: none;
    padding: 10px 22px; border-radius: var(--border-radius-sm);
    cursor: pointer; font-size: 1em; font-weight: 600;
    transition: var(--transition);
    display: inline-flex; align-items: center; gap: 6px;
    text-decoration: none;
    box-shadow: 0 4px 14px var(--accent-glow);
}
.btn:hover, .ctrl-btn:hover, .ping-btn:hover, .action-btn:hover,
.minecraft-btn:hover, .copy-btn:hover {
    background: var(--button-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px var(--accent-glow);
}
.btn:active { transform: translateY(0); }
.btn.secondary {
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-color-primary);
    border: 1px solid var(--glass-border);
    box-shadow: none;
}
html[data-theme="dark"] .btn.secondary {
    background: rgba(255, 255, 255, 0.08);
}
.btn.secondary:hover {
    background: var(--button-bg); color: white;
    box-shadow: 0 4px 14px var(--accent-glow);
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

input[type="text"], input[type="number"], input[type="color"], textarea, select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-sm);
    font-size: 1em;
    color: var(--text-color-primary);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
    font-family: inherit;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
    background: var(--glass-bg-strong);
}

a { color: var(--accent-color); text-decoration: none; transition: var(--transition); }
a:hover { text-decoration: underline; color: var(--accent-hover); }

.back-link {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--accent-color); text-decoration: none;
    padding: 8px 16px; border-radius: var(--border-radius-sm);
    margin-bottom: 20px; transition: var(--transition);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.back-link:hover {
    background: var(--glass-bg-strong);
    text-decoration: none;
    transform: translateX(-4px);
}

/* ================= 页脚 ================= */
.footer {
    text-align: center; padding: 24px;
    color: var(--text-color-secondary);
    font-size: 0.9em; margin-top: 40px;
    border-top: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}
.footer a { color: var(--accent-color); }

/* ================= Toast ================= */
.toast-container {
    position: fixed; top: calc(var(--nav-height) + 20px); left: 50%;
    transform: translateX(-50%); z-index: 9999;
    display: flex; flex-direction: column; gap: 10px; pointer-events: none;
}
.toast {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    color: var(--text-color-primary);
    padding: 12px 24px; border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
    animation: slideDown 0.3s ease, fadeOut 0.3s ease 2.7s;
    pointer-events: auto; font-weight: 500;
}
@keyframes slideDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }

/* ================= 工具类 ================= */
.flex { display: flex; } .flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; }
.items-center { align-items: center; } .justify-center { justify-content: center; }
.mt-2 { margin-top: 8px; } .mt-4 { margin-top: 16px; } .mb-4 { margin-bottom: 16px; }
.hidden { display: none !important; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.badge {
    display: inline-block; padding: 4px 12px; border-radius: 20px;
    font-size: 0.85em; font-weight: 600;
}
.badge-primary { background: var(--button-bg); color: white; }
.badge-success { background: #66bb6a; color: white; }
.badge-danger { background: #ef5350; color: white; }

/* ================= 滚动条 ================= */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--primary-color-dark);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-color); }

/* ============================================================
   AI 侧边栏 —— 毛玻璃化
   ============================================================ */
.ai-sidebar {
    width: 350px;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-left: 1px solid var(--glass-border);
    display: flex; flex-direction: column;
    position: fixed; right: 0; top: var(--nav-height); bottom: 0;
    z-index: 999;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.ai-sidebar.open { transform: translateX(0); }

.sidebar-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--glass-border);
    display: flex; justify-content: space-between; align-items: center;
    background: linear-gradient(135deg, rgba(79,142,247,0.15) 0%, rgba(197,138,255,0.15) 100%);
}

.chat-area {
    flex: 1; overflow-y: auto; padding: 20px;
    display: flex; flex-direction: column; gap: 16px;
}

.message {
    max-width: 85%; padding: 12px 16px; border-radius: var(--border-radius);
    font-size: 0.95em; line-height: 1.5; word-break: break-word;
    animation: fadeInUp 0.3s ease;
}

.msg-user {
    align-self: flex-end;
    background: var(--button-bg);
    color: white;
    border-bottom-right-radius: 2px;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.msg-ai {
    align-self: flex-start;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-color-primary);
    border: 1px solid var(--glass-border);
    border-bottom-left-radius: 2px;
}

.chat-input-area {
    padding: 16px;
    border-top: 1px solid var(--glass-border);
    display: flex; gap: 10px;
    background: rgba(255, 255, 255, 0.3);
}
html[data-theme="dark"] .chat-input-area {
    background: rgba(0, 0, 0, 0.2);
}

.chat-input {
    flex: 1; padding: 10px 14px; border-radius: var(--border-radius-sm);
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-color-primary); outline: none;
    transition: var(--transition);
}
html[data-theme="dark"] .chat-input {
    background: rgba(255, 255, 255, 0.06);
}
.chat-input:focus { border-color: var(--accent-color); }

.chat-send {
    background: var(--button-bg); color: white; border: none;
    border-radius: var(--border-radius-sm); padding: 0 20px;
    cursor: pointer; font-weight: 600;
    transition: var(--transition);
}
.chat-send:hover { filter: brightness(1.1); transform: translateY(-1px); }

.sidebar-overlay {
    position: fixed; top: var(--nav-height); left: 0; width: 100%;
    height: calc(100% - var(--nav-height));
    background: rgba(10, 15, 35, 0.3);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 998; opacity: 0; visibility: hidden; transition: 0.3s;
}
.sidebar-overlay.active { opacity: 1; visibility: visible; }

.float-toggle {
    position: fixed; right: 24px; bottom: 24px;
    width: 56px; height: 56px;
    background: var(--button-bg);
    color: white; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    box-shadow: 0 8px 24px var(--accent-glow);
    z-index: 997; border: none; font-size: 1.2em; font-weight: bold;
    transition: var(--transition);
}
.float-toggle:hover {
    transform: scale(1.1) rotate(10deg);
    box-shadow: 0 12px 32px var(--accent-glow);
}

/* ================= 评论区所有者标识 ================= */
.owner-badge {
    background-color: var(--owner-badge-bg) !important;
    color: var(--owner-badge-text) !important;
    font-size: 0.75em;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 8px;
    vertical-align: middle;
    font-weight: bold;
}
.comment-author-name { display: inline-flex; align-items: center; }

/* ============================================================
   新增组件：进度条 / 回到顶部 / 鼠标光斑 / 一言 / 服务器状态等
   ============================================================ */

/* 顶部阅读进度条 */
#scroll-progress {
    position: fixed; top: 0; left: 0;
    height: 3px; width: 0%;
    background: linear-gradient(90deg, #4f8ef7, #b06cff, #ff7eb3);
    z-index: 1001;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px rgba(176, 108, 255, 0.6);
}

/* 鼠标跟随光斑 */
#cursor-glow {
    position: fixed;
    width: 320px; height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(176, 108, 255, 0.18) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
    transform: translate(-50%, -50%);
    mix-blend-mode: screen;
}
@media (max-width: 768px) { #cursor-glow { display: none; } }

/* 回到顶部按钮 */
#back-to-top {
    position: fixed;
    right: 24px; bottom: 96px;
    width: 48px; height: 48px;
    border-radius: 50%;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--accent-color);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2em;
    z-index: 996;
    opacity: 0; visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    box-shadow: var(--shadow);
}
#back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
#back-to-top:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); color: var(--accent-hover); }

/* 滚动淡入：默认可见，JS 入视时加动画类 */
.content-section { transition: opacity 0.6s ease, transform 0.6s ease; }

/* 3D tilt 卡片 */
.tilt { transition: transform 0.2s ease-out; transform-style: preserve-3d; will-change: transform; }

/* 一言卡片 */
.hitokoto-box {
    margin: 16px 0 0;
    padding: 14px 18px;
    background: rgba(255,255,255,0.35);
    border: 1px solid var(--glass-border);
    border-left: 3px solid var(--accent-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.95em;
    color: var(--text-color-secondary);
    font-style: italic;
}
html[data-theme="dark"] .hitokoto-box { background: rgba(255,255,255,0.05); }
.hitokoto-box .hitokoto-from {
    display: block; margin-top: 6px; font-size: 0.8em;
    text-align: right; opacity: 0.7; font-style: normal;
}

/* 服务器状态徽章 */
.server-status {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 0.85em; padding: 4px 12px;
    border-radius: 999px;
    background: rgba(102, 187, 106, 0.15);
    color: #4caf50;
    border: 1px solid rgba(102, 187, 106, 0.3);
}
.server-status.offline {
    background: rgba(239, 83, 80, 0.15);
    color: #ef5350;
    border-color: rgba(239, 83, 80, 0.3);
}
.server-status .dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: currentColor;
    animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* 时钟 & 问候 */
.greeting {
    font-size: 0.95em; color: var(--text-color-secondary);
    margin-top: 8px; letter-spacing: 1px;
}
.clock {
    font-variant-numeric: tabular-nums;
    font-weight: 600; color: var(--accent-color);
}

/* 网站统计小条 */
.site-stats {
    display: flex; flex-wrap: wrap; gap: 10px;
    margin-top: 16px; justify-content: center;
}
.stat-pill {
    padding: 6px 14px;
    background: rgba(255,255,255,0.4);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    font-size: 0.85em;
    color: var(--text-color-secondary);
}
html[data-theme="dark"] .stat-pill { background: rgba(255,255,255,0.06); }
.stat-pill strong { color: var(--accent-color); font-weight: 600; }

/* 打字机光标 */
.typewriter-cursor {
    display: inline-block; width: 2px; height: 1em;
    background: var(--accent-color);
    margin-left: 2px; vertical-align: middle;
    animation: blink 0.8s infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* 加载遮罩 —— 纯 CSS 自动消失，不依赖 JS */
#loader {
    position: fixed; inset: 0;
    background: var(--primary-color-light);
    z-index: 10000;
    display: flex; align-items: center; justify-content: center;
    animation: loaderFade 0.6s ease 1.4s forwards;
    pointer-events: all;
}
@keyframes loaderFade {
    to { opacity: 0; visibility: hidden; pointer-events: none; }
}
#loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-text {
    font-size: 1.2em; color: var(--accent-color);
    font-weight: 600; letter-spacing: 2px;
}
.loader-text::after { content: ''; animation: dots 1.5s steps(4) infinite; }
@keyframes dots {
    0% { content: ''; } 25% { content: '.'; }
    50% { content: '..'; } 75% { content: '...'; }
}

/* ================= 自定义鼠标指针 ================= */
:root {
    --cursor-url: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='28' viewBox='0 0 28 28'><path d='M4 2 L4 22 L9 18 L13 25 L16 23 L12 16 L20 16 Z' fill='%23e0f0ff' stroke='%234fc3f7' stroke-width='1.5' stroke-linejoin='round'/><circle cx='7' cy='8' r='1.5' fill='%234fc3f7'/></svg>") 4 4, auto;
    --cursor-pointer: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'><path d='M6 3 L6 20 L10 17 L14 24 L17 22 L13 15 L21 15 Z' fill='%23b3d9ff' stroke='%237cb8ff' stroke-width='1.5' stroke-linejoin='round'/><circle cx='9' cy='9' r='1.5' fill='%234fc3f7'/></svg>") 4 4, pointer;
}
* { cursor: var(--cursor-url) !important; }
a, button, .btn, .item-btn, .color-swatch, summary, .collapsible,
input[type=checkbox], input[type=radio], select, label[for],
.theme-toggle, .back-to-top, .float-toggle, .comment-btn, .nav-link,
.stat-pill, .mc-nav-cat, .ore-row, .challenge-card, .collapse-arrow,
[onclick], [role=button] { cursor: var(--cursor-pointer) !important; }
input[type=text], input[type=number], input[type=password], textarea { cursor: text !important; }

/* ================= 点击水波纹 ================= */
.ripple-container { position: relative; overflow: hidden; }
.ripple {
    position: absolute; border-radius: 50%;
    background: rgba(255,255,255,0.5);
    transform: scale(0); animation: ripple-anim 0.6s ease-out;
    pointer-events: none;
}
html[data-theme="dark"] .ripple { background: rgba(255,255,255,0.2); }
@keyframes ripple-anim {
    to { transform: scale(4); opacity: 0; }
}

/* 按钮点击缩放 */
.btn, .item-btn, .color-swatch, .nav-link, .theme-toggle, .back-to-top, .float-toggle {
    transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:active, .item-btn:active, .color-swatch:active, .nav-link:active,
.theme-toggle:active, .back-to-top:active, .float-toggle:active {
    transform: scale(0.94);
}

/* 页面加载淡入 */
@keyframes pageFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
.container, .top-nav { animation: pageFadeIn 0.5s ease; }

/* 卡片入场 */
.content-section { animation: fadeInUp 0.4s ease; }
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ================= 点击水波纹 ================= */
.ripple-container {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    transform: scale(0);
    animation: ripple-anim 0.6s ease-out;
    pointer-events: none;
}
html[data-theme="dark"] .ripple-container { background: rgba(176,200,255,0.3); }
@keyframes ripple-anim {
    to { transform: scale(4); opacity: 0; }
}
@media (max-width: 768px) {
    .container { padding: 16px; }
    .content-section { padding: 20px; }
    .nav-links { gap: 4px; }
    .nav-link { padding: 6px 10px; font-size: 0.85em; }
    body::before, body::after { width: 90vw; height: 90vw; }
    #back-to-top { right: 16px; bottom: 88px; width: 42px; height: 42px; }
}

/* ============================================================
   新增：颜色代码表 / 矿石速查 / 挑战生成器 / 圆形生成器
   ============================================================ */

/* 颜色代码方块 */
.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 8px;
    margin-top: 12px;
}
.color-swatch {
    padding: 14px 8px;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    font-family: 'Consolas', monospace;
    font-weight: bold;
    font-size: 0.9em;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
}
.color-swatch:hover { transform: translateY(-3px) scale(1.03); box-shadow: 0 6px 18px rgba(0,0,0,0.2); }
.color-swatch .code { font-size: 1.1em; display: block; }
.color-swatch .name { font-size: 0.7em; opacity: 0.8; display: block; margin-top: 2px; }

/* 矿石速查表 */
.ore-row {
    display: grid;
    grid-template-columns: 100px 1fr 80px;
    gap: 10px; align-items: center;
    padding: 8px 12px;
    margin: 4px 0;
    background: rgba(255,255,255,0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    font-size: 0.9em;
}
html[data-theme="dark"] .ore-row { background: rgba(255,255,255,0.05); }
.ore-bar {
    height: 10px; border-radius: 5px;
    background: linear-gradient(90deg, #4fc3f7, #b06cff);
    position: relative;
}
.ore-best {
    text-align: right;
    font-weight: 600;
    color: var(--accent-color);
    font-variant-numeric: tabular-nums;
}

/* 挑战卡片 */
.challenge-card {
    margin-top: 12px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(79,142,247,0.12), rgba(176,108,255,0.12));
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    text-align: center;
    min-height: 80px;
    display: flex; flex-direction: column; justify-content: center;
}
.challenge-text { font-size: 1.15em; font-weight: 600; color: var(--text-color-primary); line-height: 1.6; }
.challenge-tag {
    display: inline-block;
    margin: 4px; padding: 3px 10px;
    background: var(--button-bg); color: white;
    border-radius: 999px; font-size: 0.8em;
}

/* 圆形生成器输出 */
.circle-canvas {
    background: rgba(0,0,0,0.25);
    color: #7fff9e;
    padding: 16px;
    border-radius: 10px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 10px;
    line-height: 1.1;
    white-space: pre;
    overflow: auto;
    margin-top: 10px;
    max-height: 300px;
    text-align: center;
}
html[data-theme="dark"] .circle-canvas { background: rgba(0,0,0,0.5); }

/* 折叠面板 */
.collapsible > summary {
    user-select: none;
    transition: color 0.2s;
}
.collapsible > summary:hover { filter: brightness(1.1); }
.collapsible .collapse-arrow {
    display: inline-block;
    transition: transform 0.25s ease;
    font-size: 0.8em;
    color: var(--accent-color);
}
.collapsible[open] .collapse-arrow { transform: rotate(90deg); }
.collapsible[open] > summary { margin-bottom: 16px; }
.collapsible > *:not(summary) { animation: fadeInUp 0.3s ease; }

/* MC 导航卡片 */
.mc-nav-cat {
    background: rgba(255,255,255,0.4);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    padding: 14px;
    transition: transform 0.2s, box-shadow 0.2s;
    transform-style: preserve-3d;
}
html[data-theme="dark"] .mc-nav-cat { background: rgba(255,255,255,0.06); }
.mc-nav-cat:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.mc-nav-cat h4 {
    margin: 0 0 10px;
    font-size: 0.95em;
    color: var(--accent-color);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 6px;
}
.mc-nav-cat a {
    display: block;
    padding: 5px 8px;
    border-radius: 6px;
    color: var(--text-color-primary);
    text-decoration: none;
    font-size: 0.88em;
    transition: background 0.15s;
}
.mc-nav-cat a:hover { background: var(--glass-bg); color: var(--accent-color); }
.mc-nav-cat a small { display: block; opacity: 0.6; font-size: 0.85em; }

/* ================= 毛玻璃降级（不支持 backdrop-filter 时） ================= */
@supports not (backdrop-filter: blur(1px)) {
    .content-section, .top-nav, .ai-sidebar, .footer {
        background: rgba(255, 255, 255, 0.92);
    }
    html[data-theme="dark"] .content-section,
    html[data-theme="dark"] .top-nav,
    html[data-theme="dark"] .ai-sidebar,
    html[data-theme="dark"] .footer {
        background: rgba(22, 29, 58, 0.95);
    }
}