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

html {
    scroll-behavior: smooth;
}

html::-webkit-scrollbar {
    display: none;
}

html {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

:root {
    --bg: #fafafa;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #ebebeb;
    --bg-card: rgba(255, 255, 255, 0.7);
    --text: #1a1a1a;
    --text-secondary: #555555;
    --text-muted: #888888;
    --border: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.04);
    --accent: #2a2a2a;
    --accent-light: rgba(42, 42, 42, 0.06);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
    --header-bg: rgba(250, 250, 250, 0.75);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    --font-serif: "Noto Serif SC", Georgia, "Times New Roman", serif;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

::selection {
    background: var(--accent);
    color: var(--bg);
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    /* 顶部默认状态：背景完全透明，文字可见 */
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: 1px solid transparent;
    border-bottom: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1), filter 0.35s ease;
}

/* 滚动渐变状态：禁用所有过渡，由 JS 逐帧控制 */
.header.scrolling {
    transition: none;
}

/* 胶囊悬浮状态 */
.header.capsule {
    top: 28px;
    left: 10%;
    right: 10%;
    border-radius: 38px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow:
        0 10px 30px rgba(0, 0, 0, 0.08),
        0 2px 8px rgba(0, 0, 0, 0.04);
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    position: absolute;
    left: 24px;
    transition: opacity 0.3s ease;
}

.logo:hover {
    opacity: 0.8;
}

.logo-svg {
    width: 28px;
    height: 28px;
    color: var(--text);
    transition: transform 0.3s ease;
}

.logo:hover .logo-svg {
    transform: scale(1.05);
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 17px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--text);
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav a {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.25s ease;
    position: relative;
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.3px;
}

.nav-icon {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    transition: all 0.25s ease;
}

.nav-icon-small {
    width: 15px;
    height: 15px;
}

.nav a:hover {
    color: var(--text);
}

.nav a:hover .nav-icon {
    color: var(--text);
}

.nav a.active {
    color: var(--text);
}

.nav a.active .nav-icon {
    color: var(--text);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: all 0.25s ease;
    transform: translateX(-50%);
}

.nav a:hover::after {
    width: 100%;
}

.nav a.active::after {
    width: 100%;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.animate-scale-in {
    animation: scaleIn 0.5s ease forwards;
}

@media (max-width: 768px) {
    .header-inner {
        padding: 0 16px;
        height: 56px;
    }

    .logo {
        left: 16px;
    }

    .logo-text {
        display: none;
    }

    .nav {
        gap: 24px;
    }

    .nav a {
        font-size: 13px;
    }

    .header.capsule {
        top: 16px;
        left: 4%;
        right: 4%;
        border-radius: 28px;
    }
}

@media (max-width: 480px) {
    .nav {
        gap: 20px;
    }

    .nav a {
        font-size: 12px;
    }

    .nav-icon {
        width: 14px;
        height: 14px;
    }

    .nav-icon-small {
        width: 13px;
        height: 13px;
    }

    .header.capsule {
        top: 12px;
        left: 3%;
        right: 3%;
        border-radius: 24px;
    }
}

/* 旧 skeleton 定义已移至下方 Doodle 公共区（统一短横线命名 skeleton-shimmer） */

.skeleton-text {
    height: 14px;
    margin-bottom: 10px;
}

.skeleton-text:last-child {
    width: 60%;
    margin-bottom: 0;
}

.skeleton-title {
    height: 20px;
    width: 40%;
    margin-bottom: 12px;
}

.skeleton-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
}

.skeleton-circle {
    border-radius: 50%;
}

.skeleton-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--glass-shadow);
}

.skeleton-image {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: var(--radius);
}

.modal-blur .header,
.modal-blur .hero,
.modal-blur .message-entry,
.modal-blur .main,
.modal-blur .footer {
    filter: blur(8px);
}

.modal-blur-backdrop {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: transparent;
}

/* ==========================================================================
   Doodle Studio 公共样式
   提取自 index / links / message / moment / about 五个页面 CSS 的公共部分
   设计系统：纸白 #faf9f5 / 墨黑 #1a1a1a + 黄粉蓝绿橙点缀 + 厚黑边硬阴影
   字体：Nunito (圆体无衬线) + JetBrains Mono
   ========================================================================== */

/* ---------- Doodle CSS 变量 ---------- */
:root {
    --paper: #faf9f5;
    --ink: #1a1a1a;
    --yellow: #ffd93d;
    --pink: #ff7675;
    --blue: #6c5ce7;
    --green: #55efc4;
    --orange: #ffa502;
    --shadow-hard: 4px 4px 0px 0px #1a1a1a;
    --shadow-hard-sm: 2px 2px 0px 0px #1a1a1a;
    --shadow-hard-lg: 6px 6px 0px 0px #1a1a1a;
    --shadow-hard-xl: 8px 8px 0px 0px #1a1a1a;
    --font-doodle: Nunito, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    /* 文本变量（Doodle 扩展，覆盖旧值） */
    --text-muted: #6b6b6b;
    --text-secondary: #444444;
    --border-soft: rgba(26, 26, 26, 0.1);
}

/* ---------- 页面级基础：涂鸦纸底 + 圆体字 ---------- */
body.page-index,
body.page-links,
body.page-message,
body.page-moment,
body.page-about {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-doodle);
    background-image: radial-gradient(var(--ink) 0.6px, transparent 0.6px);
    background-size: 28px 28px;
    background-position: 0 0;
}

body.page-index::before,
body.page-links::before,
body.page-message::before,
body.page-moment::before,
body.page-about::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: radial-gradient(var(--ink) 0.6px, transparent 0.6px);
    background-size: 28px 28px;
    opacity: 0.04;
    pointer-events: none;
    z-index: 0;
}

body.page-index > *,
body.page-links > *,
body.page-message > *,
body.page-moment > *,
body.page-about > * { position: relative; z-index: 1; }

body.page-index #header-placeholder,
body.page-links #header-placeholder,
body.page-message #header-placeholder,
body.page-moment #header-placeholder,
body.page-about #header-placeholder { z-index: 50; }

body.page-index .toast,
body.page-links .toast,
body.page-message .toast,
body.page-moment .toast,
body.page-about .toast { position: fixed; z-index: 9999; }

/* ---------- 站点头尾：涂鸦化覆盖 ---------- */
.header.capsule {
    background: rgba(255, 255, 255, 0.94) !important;
    border: 2px solid var(--ink) !important;
    border-radius: 24px !important;
    box-shadow: var(--shadow-hard) !important;
    backdrop-filter: blur(12px) saturate(180%) !important;
    -webkit-backdrop-filter: blur(12px) saturate(180%) !important;
}
.header .logo-text {
    font-family: var(--font-doodle) !important;
    font-weight: 900 !important;
    font-size: 18px !important;
    letter-spacing: -0.02em !important;
}
.header .logo-svg { color: var(--ink) !important; }
.header .nav a {
    font-family: var(--font-doodle) !important;
    font-weight: 800 !important;
    font-size: 14px !important;
    letter-spacing: 0 !important;
    text-transform: uppercase;
}
.header .nav a:hover { color: var(--blue) !important; }
.header .nav a.active { color: var(--ink) !important; }
.header .nav a.active::after,
.header .nav a:hover::after {
    background: var(--yellow) !important;
    height: 4px !important;
    border-radius: 2px !important;
}

/* ---------- 入场动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 关键帧动画（统一短横线命名） ---------- */
@keyframes bounce-slow {
    0%, 100% { transform: translateY(-10px) rotate(0deg); }
    50% { transform: translateY(10px) rotate(5deg); }
}
@keyframes float-anim {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}
@keyframes spin-slow { to { transform: rotate(360deg); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes wiggle {
    0%, 100% { transform: rotate(-3deg); }
    50% { transform: rotate(3deg); }
}
@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ---------- 骨架屏（Doodle 版，覆盖旧定义） ---------- */
.skeleton {
    background: linear-gradient(90deg, rgba(26,26,26,0.06) 0%, rgba(26,26,26,0.12) 50%, rgba(26,26,26,0.06) 100%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.6s ease-in-out infinite;
    border-radius: 8px;
    display: block;
}

/* ---------- Toast 提示（胶囊风） ---------- */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 1200;
    padding: 12px 22px;
    background: var(--ink);
    color: var(--paper);
    border: 3px solid var(--ink);
    border-radius: 999px;
    font-family: var(--font-doodle);
    font-size: 14px;
    font-weight: 900;
    letter-spacing: 0;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-hard);
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ---------- 通用工具类 ---------- */
.hidden { display: none !important; }

/* ---------- 减弱动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .reveal { opacity: 1; transform: none; transition: none; }
}