/* ---------- 全局重置 ---------- */
* {
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    box-sizing: border-box;
}
:root { 
    --bg-color: #ffffff; 
    --text-color: #000000; 
    --menu-bg: rgba(240, 240, 240); 
    --menu-border: rgba(0, 0, 0, 0.08); 
    --menu-shadow: rgba(0, 0, 0, 0.04);
    --pixel-color: #000000; 
    --status-color: rgba(0,0,0,0.35);
    --detail-color: rgba(0,0,0,0.6);
    --card-blur: 16px;
}
body.dark-mode { 
    --bg-color: #000000; 
    --text-color: #ffffff; 
    --menu-bg: rgba(15, 15, 15); 
    --menu-border: rgba(255, 255, 255, 0.08); 
    --menu-shadow: rgba(0, 0, 0, 0.5); 
    --pixel-color: #ffffff;
    --status-color: rgba(255,255,255,0.35);
    --detail-color: rgba(255,255,255,0.7);
    --card-blur: 16px;
}

body { 
    margin: 0; padding: 0; overflow: hidden; 
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    user-select: none;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.6s ease, color 0.6s ease;
    height: 100vh;
    width: 100vw;
}

/* ---------- 背景层 (纯色) ---------- */
#app-bg { 
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; 
    z-index: 1; 
    background-color: var(--bg-color); 
    transition: background-color 0.6s ease, opacity 0.6s ease; 
    opacity: 1;
}

/* ---------- Logo (居中，带淡入和缩放动画) ---------- */
#logo-container { 
    position: fixed; 
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(1);
    width: 380px; 
    transform-origin: center center;
    cursor: pointer; z-index: 25; 
    opacity: 0;  /* 初始透明 */
    animation: fadeIn 2s ease forwards;  /* 1秒淡入 */
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);  /* 缩放动画 */
    -webkit-tap-highlight-color: transparent;
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

#logo-container img { 
    width: 100%; height: auto; display: block; pointer-events: none; 
    background: transparent;
}
#logo-container .fallback-logo {
    display: none;
    font-size: 120px;
    text-align: center;
    line-height: 1;
    background: linear-gradient(135deg, #222 0%, #888 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
body.dark-mode #logo-container .fallback-logo {
    background: linear-gradient(135deg, #eee 0%, #aaa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
#logo-container img.error + .fallback-logo { display: block; }
#logo-container img.error { display: none; }

/* 展开态：保持在中心，仅缩小 (带过渡) */
#logo-container.active { 
    transform: translate(-50%, -50%) scale(0.4);
}
/* 无 :active 干扰 transform */

/* ---------- 菜单层 ---------- */
#menu-layer { 
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; 
    z-index: 15; pointer-events: none; opacity: 0; 
    transition: opacity 0.3s ease;
    display: flex; justify-content: center; align-items: center; 
}

/* ---------- 菜单网格 ---------- */
#menu-grid { 
    width: 40%;
    display: grid; 
    gap: 150px;
    grid-template-columns: 1fr 1fr;
}
/* 特殊子项数量适配 */
#menu-grid:has(.card-wrapper:only-child) {
    grid-template-columns: 1fr;
    width: 30%;
}
#menu-grid:has(.card-wrapper:nth-last-child(2):first-child) {
    grid-template-columns: 1fr 1fr;
    width: 55%;
    gap: 250px;
}
#menu-grid:has(.card-wrapper:nth-last-child(3):first-child) {
    grid-template-columns: 1fr 1fr;
    width: 68%;
}

.card-wrapper { 
    display: flex; flex-direction: column; width: 100%; 
    will-change: transform, opacity;
}

/* ---------- 核心卡片 ---------- */
.menu-card {
    position: relative;
    width: 100%; aspect-ratio: 1 / 1;
    background: var(--menu-bg);
    backdrop-filter: blur(var(--card-blur));
    -webkit-backdrop-filter: blur(var(--card-blur));
    border: 1px solid var(--menu-border);
    box-shadow: 0 8px 24px var(--menu-shadow);
    padding: 0; 
    display: flex; flex-direction: column; align-items: stretch;
    cursor: pointer; 
    transition: transform 0.2s ease, background 0.2s ease;
    overflow: hidden;
    opacity: 0;
    animation-duration: 0.7s;
    animation-fill-mode: forwards;
    animation-timing-function: cubic-bezier(0.34, 1.56, 0.64, 1);
    will-change: transform, opacity;
}
/* 反向四角滑入动画 (保留入场动感) */
@keyframes slide-tl {
    0% { opacity: 0; transform: translate(-20px, -20px) scale(0.94); }
    100% { opacity: 1; transform: translate(0, 0) scale(1); }
}
@keyframes slide-tr {
    0% { opacity: 0; transform: translate(20px, -20px) scale(0.94); }
    100% { opacity: 1; transform: translate(0, 0) scale(1); }
}
@keyframes slide-bl {
    0% { opacity: 0; transform: translate(-20px, 20px) scale(0.94); }
    100% { opacity: 1; transform: translate(0, 0) scale(1); }
}
@keyframes slide-br {
    0% { opacity: 0; transform: translate(20px, 20px) scale(0.94); }
    100% { opacity: 1; transform: translate(0, 0) scale(1); }
}
.menu-card.slide-tl { animation-name: slide-tl; }
.menu-card.slide-tr { animation-name: slide-tr; }
.menu-card.slide-bl { animation-name: slide-bl; }
.menu-card.slide-br { animation-name: slide-br; }

.menu-card.no-click { cursor: default; }
.menu-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    pointer-events: none;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    z-index: 2;
    transition: opacity 0.2s ease;
}
body.dark-mode .menu-card::before {
    background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, transparent 50%);
}
.menu-card.press::before {
    opacity: 0.4 !important;
}
.menu-card.press {
    backdrop-filter: blur(24px) !important;
    -webkit-backdrop-filter: blur(24px) !important;
    background: var(--menu-bg) !important;
}

@media (hover: hover) { 
    .menu-card:not(.no-click):hover { transform: scale(1.03); } 
}
@media (prefers-reduced-motion: reduce) {
    .menu-card { animation: none !important; opacity: 1; transform: none !important; }
    .menu-card:hover { transform: none; }
}

/* ---------- 像素区块 ---------- */
.pixel-block {
    width: 100%; padding: 0; 
    display: flex; flex-direction: column;
    flex-shrink: 0;
}
.pixel-grid {
    display: grid; 
    grid-template-columns: repeat(48, 1fr);
    grid-template-rows: repeat(3, 4px);
    gap: 0;
    width: 100%;
}
.pixel-cell { 
    background-color: transparent; 
    aspect-ratio: 1 / 1;
    transition: background-color 0.6s ease;
}
.pixel-cell.filled { background-color: var(--pixel-color); }

/* ---------- 卡片内容 ---------- */
.card-content { 
    flex: 1; display: flex; flex-direction: column;
    justify-content: center; align-items: center;
    padding: 0 18px 18px 18px; 
    color: var(--text-color);
    text-align: center;
    position: relative;
    z-index: 1;
}
.title-wrapper {
    display: flex; flex-direction: column;
    align-items: center;
    margin-bottom: 2px;
}
.menu-title { 
    font-size: 1.2rem; 
    font-weight: 450; 
    letter-spacing: 0.02em; 
    color: var(--text-color); 
    line-height: 1.2;
}
.menu-subtitle { 
    font-size: 0.65rem; 
    font-weight: 400; 
    letter-spacing: 0.3em;
    opacity: 0.5; 
    color: var(--text-color);
    margin-top: 2px; 
    text-transform: uppercase;
    font-feature-settings: "tnum";
}
.menu-status {
    font-size: 0.55rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    color: var(--status-color);
    margin-top: 4px;
    opacity: 0.7;
}
.menu-status.setting-status {
    font-size: 0.65rem;
    letter-spacing: 0.05em;
    opacity: 0.8;
}

/* ---------- Detail 渐显 ---------- */
.card-detail {
    font-size: 0.6rem;
    font-weight: 400;
    color: var(--detail-color);
    margin-top: 6px;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform: translateY(4px);
    letter-spacing: 0.04em;
    max-width: 90%;
    word-break: break-all;
    line-height: 1.3;
}
.card-detail.visible {
    opacity: 1;
    transform: translateY(0);
}
.card-detail.locked {
    transition-duration: 0.5s;
}

/* 响应式 (手机) */
@media screen and (max-width: 768px) {
    #logo-container { width: 160px; }
    #menu-grid { 
        width: 80%; 
        gap: 75px; 
        grid-template-columns: 1fr 1fr;
    }
    #menu-grid:has(.card-wrapper:only-child) {
        grid-template-columns: 1fr;
        width: 50%;
    }
    #menu-grid:has(.card-wrapper:nth-last-child(2):first-child) {
        grid-template-columns: 1fr 1fr;
        width: 80%;
        gap: 100px; 
    }
    #menu-grid:has(.card-wrapper:nth-last-child(3):first-child) {
        grid-template-columns: 1fr 1fr;
        width: 80%;
        gap: 75px; 
    }
    .pixel-grid { grid-template-rows: repeat(3, 3px); }
    .card-content { padding: 0 14px 14px 14px; }
    .menu-title { font-size: 0.9rem; }
    .menu-subtitle { font-size: 0.5rem; letter-spacing: 0.25em; }
    .menu-status { font-size: 0.45rem; }
    .menu-status.setting-status { font-size: 0.5rem; }
    .card-detail { font-size: 0.45rem; }
}