/* 首页专用样式；设计令牌与通用组件在 common.css */

/* --- Hero --- */
.hero { padding: clamp(28px, 6vw, 72px) var(--page-pad) clamp(20px, 3vw, 36px); }
.hero-inner { max-width: 1560px; margin: 0 auto; }
.hero-eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    letter-spacing: 0.12em;
    color: var(--color-primary);
    padding: 4px 12px;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
}
.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 1.1rem + 4.2vw, 4rem);
    font-weight: 900;
    line-height: 1.12;
    letter-spacing: 0.01em;
    margin-bottom: clamp(18px, 3vw, 32px);
}
.hero-br { display: none; }
.hero-num {
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
    background: linear-gradient(transparent 68%, var(--color-primary-soft) 68%);
    padding: 0 0.08em;
}
.search-box { position: relative; max-width: 720px; }
.search-icon { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); color: var(--color-text-muted); pointer-events: none; }
.search-box input {
    width: 100%;
    min-height: 58px;
    padding: 0 84px 0 52px;
    border: 2px solid var(--color-text);
    border-radius: var(--radius-lg);
    background: var(--color-bg-card);
    font-size: 1.05rem;
    box-shadow: 5px 5px 0 var(--color-text);
    transition: box-shadow var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}
.search-box input:hover { border-color: var(--color-text); }
.search-box input:focus { border-color: var(--color-primary); box-shadow: 5px 5px 0 var(--color-primary); }
.search-box input::-webkit-search-cancel-button { display: none; }
.search-kbd {
    position: absolute; right: 16px; top: 50%; transform: translateY(-50%);
    font-family: var(--font-mono); font-size: 0.75rem;
    padding: 2px 8px; border: 1px solid var(--color-border); border-radius: 6px;
    background: var(--color-surface); color: var(--color-text-muted); pointer-events: none;
}
.hero-meta { display: flex; flex-wrap: wrap; gap: 6px 22px; margin-top: 18px; font-size: 0.875rem; color: var(--color-text-muted); }
.hero-meta strong { font-family: var(--font-display); font-size: 1.1rem; color: var(--color-text); margin-right: 2px; }

/* --- Layout: 侧栏分类 + 内容 --- */
.home-layout {
    max-width: calc(1560px + 2 * var(--page-pad));
    margin: 0 auto;
    padding: 0 var(--page-pad) 2rem;
    display: grid;
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(16px, 2.5vw, 36px);
    align-items: start;
}
.side { position: sticky; top: calc(var(--bar-height) + 16px); max-height: calc(100dvh - var(--bar-height) - 32px); overflow-y: auto; scrollbar-width: thin; }
.side-nav { display: flex; flex-direction: column; gap: 2px; }
.side-link {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}
.side-link:hover { background: var(--color-surface); color: var(--color-text); }
.side-link.is-active { background: var(--color-text); color: var(--color-bg); }
.side-link.is-active .side-icon { background: transparent; color: inherit; }
.side-link.is-active .side-count { color: inherit; opacity: 0.7; }
.side-icon { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; flex-shrink: 0; }
.side-icon svg { width: 16px; height: 16px; }
.side-name { flex: 1; }
.side-count { font-size: 0.75rem; color: var(--color-text-muted); font-variant-numeric: tabular-nums; }

/* 分类色 */
.section-icon--text    { background: #E7F0FB; color: #2F6FB0; }
.section-icon--image   { background: #FBE9F1; color: #C0407A; }
.section-icon--encode  { background: #FCEBE6; color: #C9482B; }
.section-icon--convert { background: #EEEAFB; color: #6B55C8; }
.section-icon--dev     { background: #E3F3EE; color: #18794E; }
.section-icon--calc    { background: #FBF0DC; color: #B0700A; }
.section-icon--time    { background: #E2F3F6; color: #17808F; }
.section-icon--device  { background: #ECEEE4; color: #5D6B2E; }
.section-icon--life    { background: #FCEDE0; color: #C4621A; }
.section-icon--study   { background: #E8ECFB; color: #3F56C0; }
:root[data-theme="dark"] [class*="section-icon--"] { background: color-mix(in srgb, currentColor 16%, transparent); filter: brightness(1.35); }

/* --- Sections --- */
.tools-section { margin-bottom: clamp(24px, 4vw, 44px); scroll-margin-top: calc(var(--bar-height) + 16px); }
.section-header { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--color-border); }
.section-icon { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; flex-shrink: 0; }
.section-header h2 { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; }
.section-count { font-size: 0.75rem; font-weight: 600; padding: 1px 8px; border-radius: var(--radius-full); background: var(--color-surface); color: var(--color-text-muted); }
.section-count:empty { display: none; }
.section-desc { margin-left: auto; font-size: 0.8125rem; color: var(--color-text-muted); text-align: right; }
.link-btn { appearance: none; border: 0; background: none; margin-left: auto; color: var(--color-text-muted); font: inherit; font-size: 0.8125rem; cursor: pointer; padding: 6px; }
.link-btn:hover { color: var(--color-primary); }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(212px, 1fr)); gap: 10px; }

/* --- Tool Card --- */
.tool-card {
    position: relative;
    display: flex; flex-direction: column; gap: 4px;
    min-height: 84px;
    padding: 13px 14px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.tool-card:hover { border-color: var(--color-text); box-shadow: 3px 3px 0 var(--color-text); transform: translate(-1px, -1px); }
.tool-card:active { transform: none; box-shadow: none; }
.card-label { font-weight: 600; font-size: 0.9375rem; line-height: 1.35; padding-right: 22px; }
.card-desc {
    font-size: 0.8125rem; line-height: 1.45; color: var(--color-text-muted);
    display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2; overflow: hidden;
}
.card-new {
    position: absolute; top: 10px; right: 10px;
    font-size: 0.6875rem; font-weight: 700; line-height: 1;
    padding: 3px 6px; border-radius: 6px;
    background: var(--color-hot); color: #fff;
}
.tools-section--pinned .card-desc { display: none; }
.tools-section--pinned .tool-card { min-height: 0; }
.tools-section--pinned .tools-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }

.search-status { margin-bottom: 1rem; color: var(--color-text-secondary); font-size: 0.9375rem; }
.empty-state { padding: 3rem 1rem; text-align: center; color: var(--color-text-muted); display: flex; flex-direction: column; align-items: center; gap: 1rem; }

/* --- Footer / 回到顶部 --- */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem var(--page-pad) calc(2rem + var(--safe-bottom));
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
}
.footer-brand { font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--color-text); margin-bottom: 0.5rem; }
.footer-desc { max-width: 560px; margin: 0 auto 0.5rem; }
.to-top {
    position: fixed; right: 18px; bottom: calc(18px + var(--safe-bottom)); z-index: 150;
    width: 44px; height: 44px; border-radius: 50%;
    border: 1px solid var(--color-border); background: var(--color-bg-card); color: var(--color-text);
    display: grid; place-items: center; cursor: pointer; box-shadow: var(--shadow-md);
}

/* 首屏入场 */
@media (prefers-reduced-motion: no-preference) {
    .hero-eyebrow, .hero h1, .search-box, .hero-meta { animation: rise 520ms cubic-bezier(.2, .8, .2, 1) both; }
    .hero h1 { animation-delay: 60ms; } .search-box { animation-delay: 120ms; } .hero-meta { animation-delay: 180ms; }
    @keyframes rise { from { opacity: 0; transform: translateY(14px); } }
}

/* --- 平板：侧栏收窄为图标+名称；≤900 改为顶部横向滚动分类条 --- */
@media (max-width: 1100px) {
    .home-layout { grid-template-columns: 184px minmax(0, 1fr); }
    .section-desc { display: none; }
}

@media (max-width: 900px) {
    .home-layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
    .side {
        top: var(--bar-height);
        z-index: 100;
        margin: 0 calc(-1 * var(--page-pad)) 16px;
        padding: 8px var(--page-pad);
        max-height: none;
        overflow: visible;
        background: color-mix(in srgb, var(--color-bg) 90%, transparent);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--color-border);
    }
    .side-nav { flex-direction: row; gap: 6px; overflow-x: auto; scrollbar-width: none; margin: 0 calc(-1 * var(--page-pad)); padding: 0 var(--page-pad); }
    .side-nav::-webkit-scrollbar { display: none; }
    .side-link { padding: 6px 12px; border: 1px solid var(--color-border); border-radius: var(--radius-full); background: var(--color-bg-card); font-size: 0.8125rem; flex-shrink: 0; }
    .side-link.is-active { border-color: var(--color-text); }
    .side-icon, .side-count { display: none; }
    .tools-section { scroll-margin-top: calc(var(--bar-height) + 64px); }
    .search-kbd { display: none; }
    .search-box input { padding-right: 16px; }
}

@media (max-width: 560px) {
    .hero-br { display: inline; }
    .search-box input { min-height: 52px; box-shadow: 4px 4px 0 var(--color-text); }
    .tools-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
    .tool-card { min-height: 0; padding: 11px 12px; }
    .card-label { font-size: 0.875rem; }
    .card-desc { -webkit-line-clamp: 1; line-clamp: 1; font-size: 0.75rem; }
    .tools-section--pinned .tools-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 340px) {
    .tools-grid, .tools-section--pinned .tools-grid { grid-template-columns: minmax(0, 1fr); }
}