/* ==================== Tool-Hub App Design System v5 ==================== */
:root {
    color-scheme: light;
    --bg: #F3EFE5;
    --bg-ink: #E6DDC8;
    --surface: #FFFDF7;
    --surface-alt: #F6F0E4;
    --surface-strong: #FDF7EA;
    --glass: rgba(255, 253, 247, .86);
    --border: #D7CCB6;
    --border-strong: #1F2933;
    --text: #16130D;
    --text-secondary: #665E50;
    --text-faint: #8B806E;
    --primary: #0F766E;
    --primary-hover: #115E59;
    --primary-glow: rgba(15, 118, 110, .16);
    --accent: #C2410C;
    --accent-soft: rgba(194, 65, 12, .14);
    --success: #15803D;
    --warning: #B45309;
    --danger: #B91C1C;
    --radius-none: 0;
    --radius-xs: 3px;
    --radius-sm: 7px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-xl: 34px;
    --radius-full: 9999px;
    --shadow-card: 0 10px 24px rgba(42, 31, 12, .08);
    --shadow-float: 0 18px 50px rgba(42, 31, 12, .16);
    --ease: cubic-bezier(.22, 1, .36, 1);
    --duration: 340ms;
}
.dark {
    color-scheme: dark;
    --bg: #0D1110;
    --bg-ink: #151A18;
    --surface: #151A18;
    --surface-alt: #1D2421;
    --surface-strong: #111614;
    --glass: rgba(17, 22, 20, .82);
    --border: #2D3935;
    --border-strong: #C7BFAE;
    --text: #F5EFE2;
    --text-secondary: #B9AD99;
    --text-faint: #857B6C;
    --primary: #5EEAD4;
    --primary-hover: #2DD4BF;
    --primary-glow: rgba(94, 234, 212, .14);
    --accent: #FDBA74;
    --accent-soft: rgba(253, 186, 116, .14);
    --success: #86EFAC;
    --warning: #FCD34D;
    --danger: #FCA5A5;
    --shadow-card: 0 10px 30px rgba(0, 0, 0, .32);
    --shadow-float: 0 20px 60px rgba(0, 0, 0, .5);
}

body {
    min-height: 100svh;
    background:
        radial-gradient(circle at 10% -10%, var(--primary-glow), transparent 32rem),
        linear-gradient(135deg, var(--bg), var(--bg-ink));
    color: var(--text);
    transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease);
    overflow-x: hidden;
}
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: .38;
    background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 28px 28px;
    mask-image: linear-gradient(to bottom, #000, transparent 68%);
}

.glass { background: var(--glass); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); }
.hide-scrollbar::-webkit-scrollbar { display: none; }
.hide-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

.app-shell { width: min(100%, 1180px); margin-inline: auto; padding: 10px 12px calc(82px + env(safe-area-inset-bottom)); }
.app-panel, .card, .bento-card, .tool-card, .hot-tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    transition: background-color var(--duration) var(--ease), border-color var(--duration) var(--ease), color var(--duration) var(--ease), transform 220ms var(--ease), box-shadow 220ms var(--ease);
}
.app-panel { border-radius: var(--radius-lg); padding: 14px; }
.app-rail { border-radius: var(--radius-xl); border: 1px solid var(--border); background: var(--glass); box-shadow: var(--shadow-float); }

/* 分类渐变 */
.cat-ai { background: linear-gradient(135deg, #0F766E, #14B8A6); }
.cat-image { background: linear-gradient(135deg, #C2410C, #EA580C); }
.cat-dev { background: linear-gradient(135deg, #1D4ED8, #0891B2); }
.cat-site { background: linear-gradient(135deg, #7C3AED, #2563EB); }
.cat-text { background: linear-gradient(135deg, #7C2D12, #A16207); }
.cat-calc { background: linear-gradient(135deg, #B45309, #D97706); }
.cat-format { background: linear-gradient(135deg, #15803D, #0F766E); }
.cat-convert { background: linear-gradient(135deg, #4338CA, #0E7490); }
.cat-generator { background: linear-gradient(135deg, #9D174D, #C2410C); }
.cat-other { background: linear-gradient(135deg, #374151, #78716C); }

/* 顶部/底部 App 导航 */
.app-topbar {
    position: sticky;
    top: 0;
    z-index: 60;
    border-bottom: 1px solid var(--border);
    padding-top: env(safe-area-inset-top);
}
.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 18px 5px 18px 5px;
    display: grid;
    place-items: center;
    color: white;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 10px 26px var(--primary-glow);
}
.bottom-nav {
    position: fixed;
    left: 10px;
    right: 10px;
    bottom: calc(8px + env(safe-area-inset-bottom));
    z-index: 70;
    border: 1px solid var(--border);
    border-radius: 24px 24px 8px 8px;
    box-shadow: var(--shadow-float);
    overflow: hidden;
}
.bottom-nav .nav-item {
    flex: 1;
    min-height: 54px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-size: 11px;
    color: var(--text-secondary);
    transition: color 180ms var(--ease), background-color 180ms var(--ease);
}
.bottom-nav .nav-item.active { color: var(--primary); background: var(--primary-glow); }

/* 搜索/标签 */
.search-input, .modal-input, .input {
    width: 100%;
    color: var(--text);
    background: var(--surface-alt);
    border: 1px solid var(--border);
    border-radius: 16px 5px 16px 5px;
    font-size: 14px;
    min-height: 42px;
    transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease), background-color 180ms var(--ease);
}
.search-input { padding: 9px 12px 9px 38px; }
.modal-input, .input { padding: 10px 12px; }
.search-input:focus, .modal-input:focus, .input:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-glow); }
.cat-tabs-scroll { display: flex; gap: 8px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 8px 12px; -webkit-overflow-scrolling: touch; }
.cat-tab {
    flex-shrink: 0;
    scroll-snap-align: start;
    min-height: 36px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 13px;
    border: 1px solid var(--border);
    border-radius: 999px 999px 999px 4px;
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 13px;
    white-space: nowrap;
}
.cat-tab.active { background: var(--text); border-color: var(--text); color: var(--bg); }

/* 工具卡片：移动两列高密度 */
.tool-card {
    border-radius: 18px 4px 18px 4px;
    padding: 0;
    cursor: pointer;
    min-width: 0;
    min-height: 72px;
    position: relative;
}
.tool-card-bg {
    border-color: rgba(255,255,255,.35);
    overflow: hidden;
    background: linear-gradient(135deg, rgba(34,211,238,.18), rgba(16,185,129,.14)), var(--surface-alt);
}
.tool-card-bg-layer {
    position: absolute;
    inset: -12px;
    z-index: 0;
    opacity: 0;
    pointer-events: none;
    will-change: opacity;
}
.tool-card-bg-layer.is-active {
    opacity: .96;
    z-index: 1;
}
.tool-card-bg-layer img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transform: none;
    transform-origin: center;
    display: block;
    pointer-events: none;
    user-select: none;
}
.tool-card-crossfade .tool-card-bg-layer.is-active {
    opacity: .96;
    z-index: 1;
    animation: none;
}
.tool-card-crossfade[data-next-layer="a"] .tool-card-bg-layer[data-layer="a"],
.tool-card-crossfade[data-next-layer="b"] .tool-card-bg-layer[data-layer="b"] {
    z-index: 2;
    animation: tool-card-fade-in var(--card-anim-duration, 6500ms) ease-in-out both;
}
.tool-card-text-panel {
    position: relative;
    z-index: 5;
    width: 66.666%;
    height: 100%;
    min-height: 72px;
    padding: 9px 18px 8px 10px;
    color: #111;
    background: linear-gradient(90deg, rgba(255,255,255,.96) 0%, rgba(255,255,255,.78) 58%, rgba(255,255,255,0) 100%);
}
.tool-card-copy { max-width: calc(100% - 22px); }
.tool-card-title { color: #111; font-size: 12px; line-height: 1.2; }
.tool-card-desc { color: rgba(17,17,17,.72); font-size: 10px; line-height: 1.2; margin-top: 2px; }
.tool-card-actions { display: flex; align-items: center; gap: 5px; margin-top: 6px; padding-left: 26px; }
.tool-card-badge { background: rgba(17,17,17,.86); color: #fff; }
.tool-card-version { background: rgba(255,255,255,.78); color: #111; }
.tool-card:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: var(--shadow-float); }
.tool-lazy-host { display: contents; }
.tool-lazy-sentinel { min-height: 1px; }
@keyframes tool-card-fade-in {
    0% { opacity: 0; }
    100% { opacity: .96; }
}
.tool-card .cat-ai, .tool-card .cat-image, .tool-card .cat-dev, .tool-card .cat-site, .tool-card .cat-text, .tool-card .cat-calc, .tool-card .cat-format, .tool-card .cat-convert, .tool-card .cat-generator, .tool-card .cat-other { border-radius: 8px 2px 8px 2px; }
.favorite-btn { width: 24px; height: 24px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 10px 3px 10px 3px; background: rgba(255,255,255,.46); border: 1px solid rgba(17,17,17,.08); }
.mobile-recent-row { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 2px; -webkit-overflow-scrolling: touch; }
.mobile-recent-chip { flex: 0 0 auto; display: flex; align-items: center; gap: 7px; max-width: 180px; min-height: 38px; padding: 7px 10px; border-radius: 16px 4px 16px 4px; background: var(--surface-alt); border: 1px solid var(--border); font-size: 12px; }

/* Bento / 桌面 */
.bento-grid { column-count: 4; column-gap: 12px; }
.bento-card, .bento-ad, .tool-card, .desktop-section-title { break-inside: avoid; page-break-inside: avoid; margin: 0 0 12px; display: block; width: 100%; }
.bento-card { border-radius: 28px 6px 28px 6px; padding: 16px; overflow: hidden; position: relative; }
.bento-card:nth-child(odd) { border-radius: 6px 28px 6px 28px; }
.bento-card:hover { transform: translateY(-2px); border-color: var(--primary); }
.bento-2x2, .bento-2x1, .bento-1x2 { grid-column: auto; grid-row: auto; }
.desktop-section-title { column-span: all; }
.masonry-stats { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
.hot-tool-card { border-radius: 24px 4px 24px 4px; padding: 16px; cursor: pointer; }
.stat-value { font-size: clamp(22px, 3vw, 34px); line-height: 1; font-weight: 800; letter-spacing: -.04em; }
.stat-label { margin-top: 4px; font-size: 12px; color: var(--text-secondary); }
@media (max-width: 1180px) { .bento-grid { column-count: 3; } }
@media (max-width: 980px) { .bento-grid { column-count: 2; } }
@keyframes token-ad-float { 0%,100% { transform: translateY(0) rotate(-.25deg); } 50% { transform: translateY(-6px) rotate(.25deg); } }
@media (prefers-reduced-motion: no-preference) { .token-ad-image { animation: token-ad-float 5.6s ease-in-out infinite; } }
@media (prefers-reduced-motion: reduce) { .tool-card-crossfade .tool-card-bg-layer, .tool-card-crossfade .tool-card-bg-layer img { animation: none !important; } }

/* 公益 Token 群广告 */
.token-ad {
    position: relative;
    overflow: hidden;
    border-radius: 26px 6px 26px 6px;
    border: 2px solid var(--border-strong);
    background: linear-gradient(135deg, var(--text), #0F766E 55%, var(--accent));
    color: var(--bg);
    box-shadow: var(--shadow-float);
}
.token-ad::after { content: ''; position: absolute; inset: auto -20% -40% 30%; height: 120px; background: rgba(255,255,255,.18); transform: rotate(-8deg); }
.token-ad-chip { border: 1px solid currentColor; background: transparent; border-radius: 999px; padding: 3px 9px; font-size: 11px; }
.token-ad-image {
    aspect-ratio: 1024 / 1024;
    max-height: min(360px, calc(100svh - 170px));
    border: 0;
    border-radius: 34px;
    background: transparent url('/api/ad-image.php') center / cover no-repeat;
    color: #2A1B10;
    box-shadow: none;
}
.dark .token-ad-image { color: #2A1B10; }
.token-ad-image::after { display: none; }
.token-ad-art { position: absolute; inset: 0; display: block; color: inherit; pointer-events: none; }
.token-ad-copy { position: absolute; z-index: 2; color: inherit; text-shadow: none; overflow: hidden; }
.token-ad-copy-main {
    left: 12.4%;
    top: 20.6%;
    width: 55.6%;
    height: 44%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 5.2% 4.2%;
}
.token-ad-eyebrow { width: fit-content; max-width: 100%; color: #6F3518; font-size: clamp(9px, 1vw, 12px); line-height: 1; font-weight: 800; letter-spacing: .08em; white-space: nowrap; opacity: .9; }
.token-ad-copy-main h1 { margin-top: 5px; color: #231205; font-size: clamp(18px, 2.55vw, 30px); line-height: .98; font-weight: 950; letter-spacing: -.05em; max-width: 7.5em; }
.token-ad-copy-main p { margin-top: 6px; max-width: 17em; color: #5F3923; font-size: clamp(9px, .96vw, 12px); line-height: 1.32; font-weight: 650; opacity: .88; }
.token-ad-copy-cta {
    left: 7.9%;
    top: 75.4%;
    width: 18.1%;
    height: 14.9%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 6px;
    text-align: center;
    color: #3C1C0B;
    font-size: clamp(8px, .88vw, 11px);
    line-height: 1.08;
    font-weight: 750;
}
.token-ad-copy-cta strong { display: block; font-size: clamp(11px, 1.1vw, 14px); line-height: 1; color: #A24010; }
.token-ad-copy-cta span { display: block; max-width: 100%; }
.token-ad-copy-button {
    left: 37.3%;
    top: 80%;
    width: 25.8%;
    height: 6.5%;
    display: grid;
    place-items: center;
    min-height: 0;
    color: #FDF7EA;
    background: linear-gradient(135deg, #7C2D12, #C2410C);
    border-radius: 999px;
    text-shadow: none;
    font-size: clamp(10px, .95vw, 13px);
    line-height: 1;
    font-weight: 900;
    box-shadow: 0 4px 10px rgba(124,45,18,.18);
    pointer-events: auto;
}
.token-ad-desktop { width: 100%; max-height: none; margin: 0 0 12px; }
.bento-ad { min-height: 0; }
.token-ad-desktop .token-ad-copy-main h1 { font-size: clamp(15px, 1.9vw, 22px); }
.token-ad-desktop .token-ad-copy-main p { font-size: clamp(8px, .78vw, 10px); line-height: 1.24; margin-top: 4px; }
.token-ad-desktop .token-ad-eyebrow { font-size: clamp(7px, .7vw, 9px); }
.token-ad-desktop .token-ad-copy-cta { font-size: clamp(7px, .68vw, 9px); padding: 4px; }
.token-ad-desktop .token-ad-copy-cta strong { font-size: clamp(9px, .86vw, 11px); }
.token-ad-desktop .token-ad-copy-button { font-size: clamp(9px, .8vw, 11px); }
.token-ad-mobile { max-height: none; border-radius: 26px; }
.token-ad-mobile .token-ad-copy-main h1 { font-size: clamp(22px, 7vw, 30px); }
.token-ad-mobile .token-ad-copy-main p { font-size: 11px; line-height: 1.3; margin-top: 6px; }
.token-ad-mobile .token-ad-copy-cta { font-size: 10px; padding: 6px; }
.token-ad-mobile .token-ad-copy-button { font-size: 12px; }

/* 分类抽屉 */
.category-drawer-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.category-drawer-btn { text-align: left; min-height: 64px; border-radius: 18px 4px 18px 4px; border: 1px solid var(--border); background: var(--surface-alt); padding: 10px; }
.category-drawer-btn.active { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }
.category-drawer-btn b { display: block; font-size: 14px; }
.category-drawer-btn span { display: block; margin-top: 3px; font-size: 11px; color: var(--text-secondary); }

/* 弹窗/按钮/Toast */
.modal-overlay { position: fixed; inset: 0; z-index: 100; display: none; align-items: end; justify-content: center; background: rgba(0,0,0,.5); backdrop-filter: blur(5px); padding: 12px; }
.modal-overlay.show { display: flex; }
.modal-box { width: 100%; max-width: 430px; max-height: 88svh; overflow: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 28px 28px 8px 8px; padding: 18px; box-shadow: var(--shadow-float); animation: modal-in 260ms var(--ease); }
@keyframes modal-in { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
.btn-primary, .btn-ghost, .btn { min-height: 42px; border-radius: 16px 4px 16px 4px; font-weight: 700; font-size: 14px; transition: transform 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease); }
.btn-primary { width: 100%; padding: 10px 14px; background: var(--primary); color: #fff; }
.btn-primary:hover, .btn:hover { transform: translateY(-1px); }
.btn-ghost { padding: 10px 14px; background: var(--surface-alt); border: 1px solid var(--border); }
.toast { position: fixed; left: 50%; bottom: calc(86px + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 200; max-width: calc(100vw - 28px); padding: 9px 18px; border-radius: 999px 999px 999px 4px; color: #fff; font-size: 13px; font-weight: 700; box-shadow: var(--shadow-float); opacity: 0; pointer-events: none; transition: opacity 260ms var(--ease); }
.toast.show { opacity: 1; }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-info { background: #334155; }

/* sponsor 兼容 */
.sponsor-bar { position: fixed; left: 10px; right: 10px; bottom: calc(72px + env(safe-area-inset-bottom)); z-index: 45; transform: translateY(130%); transition: transform 420ms var(--ease); }
.sponsor-bar.show { transform: translateY(0); }

.fade-in-up { opacity: 0; transform: translateY(12px); transition: opacity 480ms var(--ease), transform 480ms var(--ease); }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 420px) {
    .app-shell { padding-inline: 10px; }
    .tool-card { padding: 9px; }
    .tool-card .font-medium { font-size: 13px; }
    .tool-card .text-xs { font-size: 11px; }
}
@media (min-width: 768px) {
    .modal-overlay { align-items: center; }
    .modal-box { border-radius: 28px 8px 28px 8px; }
}
@media (min-width: 1024px) {
    .app-shell { width: min(100%, 1380px); padding: 18px 24px 34px; }
    .bento-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .bento-2x1 { grid-column: span 3; }
    .tool-card { grid-column: span 2; height: 180px; min-height: 180px; }
    .tool-card-text-panel { min-height: 180px; padding-top: 16px; }
    .bottom-nav { display: none; }
    .sponsor-bar { bottom: 12px; left: 50%; right: auto; transform: translate(-50%, 130%); width: min(960px, calc(100vw - 36px)); }
    .sponsor-bar.show { transform: translate(-50%, 0); }
    .toast { bottom: 26px; }
}
@media (prefers-reduced-motion: reduce) {
    .fade-in-up { opacity: 1; transform: none; transition: none; }
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}