/* ===== Clean minimal theme (overrides app.css / tools.css) ===== */
:root, [data-theme="dark"] {
    --bg: #0a0a0b;
    --bg-elev: #111113;
    --surface: #141416;
    --surface-strong: #1b1b1f;
    --border: #26262b;
    --border-strong: #34343a;
    --text: #ededef;
    --muted: #8b8b93;
    --accent: #6e56cf;
    --accent-2: #8e7cf0;
    --accent-3: #8e7cf0;
    --accent-soft: rgba(110, 86, 207, .14);
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .35);
}
[data-theme="light"] {
    --bg: #fbfbfc;
    --bg-elev: #ffffff;
    --surface: #ffffff;
    --surface-strong: #f4f4f6;
    --border: #e6e6ea;
    --border-strong: #d4d4da;
    --text: #18181b;
    --muted: #6b6b75;
    --accent: #6e56cf;
    --accent-2: #5b45b8;
    --accent-3: #5b45b8;
    --accent-soft: rgba(110, 86, 207, .09);
    --shadow: 0 1px 2px rgba(16, 16, 24, .05), 0 8px 24px rgba(16, 16, 24, .06);
}

html, body { font-size: 15px; -webkit-font-smoothing: antialiased; }
a { color: var(--accent-2); }
.bg-orbs { display: none; }

.glass {
    background: var(--surface);
    border: 1px solid var(--border);
    backdrop-filter: none; -webkit-backdrop-filter: none;
}
.gradient-text { background: none; color: var(--text); }
.page-enter { animation: fadeIn .2s ease-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ----- Top bar ----- */
.topbar {
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: saturate(180%) blur(10px); -webkit-backdrop-filter: saturate(180%) blur(10px);
    border: 0; border-bottom: 1px solid var(--border);
    padding: .55rem 1.25rem; height: 56px;
}
.brand { font-size: 1rem; font-weight: 600; letter-spacing: -.01em; }
.logo { width: 26px; height: 26px; filter: none; }
.brand:hover .logo { transform: none; }
.tagline { font-size: .82rem; }
.theme-toggle, .menu-btn {
    width: 34px; height: 34px; border-radius: 8px; font-size: .95rem;
    background: transparent; border: 1px solid var(--border);
}
.theme-toggle:hover { transform: none; background: var(--surface-strong); }
.search-btn { border-radius: 8px; padding: .38rem .7rem; font-size: .85rem; background: var(--surface); min-width: 240px; }
.search-btn span { flex: 1; text-align: left; }
.search-btn kbd {
    font: 500 .72rem "Inter", system-ui; padding: .1rem .35rem; border-radius: 5px;
    border: 1px solid var(--border); background: var(--surface-strong); color: var(--muted);
}

/* ----- Shell / sidebar ----- */
.shell { min-height: calc(100vh - 56px - 60px); }
.sidebar {
    top: 56px; margin: 0; width: 256px; border-radius: 0;
    border: 0; border-right: 1px solid var(--border); background: var(--bg);
    max-height: calc(100vh - 56px); height: calc(100vh - 56px); padding: .75rem .6rem;
}
.sidebar a { padding: .38rem .55rem; border-radius: 6px; font-size: .87rem; color: var(--muted); gap: .55rem; }
.sidebar a:hover { background: var(--surface-strong); color: var(--text); transform: none; }
.sidebar a.active { background: var(--accent-soft); color: var(--text); box-shadow: none; font-weight: 500; }
.sidebar a.active .nav-icon { color: var(--accent-2); border-color: transparent; }
.nav-icon {
    min-width: 24px; height: 24px; border-radius: 6px; font-size: .68rem;
    background: transparent; border: 1px solid var(--border);
}
.nav-group { font-size: .68rem; letter-spacing: .08em; margin-top: .9rem; }
.nav-group[class*="cat-"] { color: var(--muted); }
.nav-group .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cat, var(--muted)); flex: none; }
.side-filter, .collapse-btn { border-radius: 6px; background: var(--surface); }
.side-head { background: var(--bg); }
.side-section { font-size: .68rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: .35rem .6rem; margin-top: .6rem; }
.sidebar.collapsed .side-section { display: none; }
.sidebar.collapsed { width: 60px; }
.sidebar.collapsed .nav-group { border-top-width: 1px; border-color: var(--border); }

/* ----- Content ----- */
.content { padding: 2rem 2.5rem 3rem; max-width: 1280px; margin: 0 auto; }
h1 { font-size: 1.6rem; font-weight: 600; letter-spacing: -.02em; }
h2 { font-weight: 600; }

/* ----- Category colors (subtle) ----- */
.cat-format   { --cat: #8e7cf0; }
.cat-encode   { --cat: #3fb4d6; }
.cat-generate { --cat: #3fbf8a; }
.cat-convert  { --cat: #e0a03a; }
.cat-inspect  { --cat: #e0709f; }
.cat-engineering { --cat: #e5735f; }
.section-title[class*="cat-"] { color: var(--text); border: 0; padding-left: 0; }
.grid[class*="cat-"] > .card { border-top: 1px solid var(--border); }
.grid[class*="cat-"] > .card .card-icon { color: var(--cat); }

/* ----- Cards ----- */
.grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: .75rem; }
.card { padding: 1rem 1.1rem; border-radius: 10px; transition: border-color .15s, background .15s; }
.card::before { display: none; }
.card:hover { transform: none; box-shadow: none; border-color: var(--border-strong); background: var(--surface-strong); }
.card h3 { font-size: .95rem; font-weight: 600; margin: .7rem 0 .2rem; }
.card p { font-size: .84rem; line-height: 1.45; }
.card-icon {
    width: 34px; height: 34px; border-radius: 8px; font-size: .8rem;
    background: var(--surface-strong); color: var(--text); border: 1px solid var(--border);
}
.card-arrow { top: 1rem; right: 1rem; opacity: 0; transition: opacity .15s, transform .15s; }
.card:hover .card-arrow { opacity: 1; color: var(--text); }
.popular-card { border: 1px solid var(--border); box-shadow: none; }
.popular-badge { background: var(--surface-strong); color: var(--muted); border: 1px solid var(--border); font-weight: 500; top: .9rem; right: .9rem; }
.popular-card:hover .popular-badge { opacity: 0; }

/* ----- Controls ----- */
.io { border-radius: 8px; background: var(--surface); font-size: .88rem; }
.io:focus, select:focus, input[type=number]:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
select, .toolbar input[type=number] { border-radius: 6px; background: var(--surface); }
.btn {
    background: var(--text); color: var(--bg); border-radius: 8px; padding: .5rem 1rem;
    font-weight: 500; font-size: .87rem; box-shadow: none;
}
.btn:hover { transform: none; filter: none; opacity: .88; box-shadow: none; }
.btn.secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn.secondary:hover { background: var(--surface-strong); opacity: 1; }
.alert, .code, .help, .result-row, .markdown-body, .stat, .qr-preview { border-radius: 10px; }
mark { background: rgba(250, 204, 21, .35); color: inherit; }
.stat strong { background: none; color: var(--text); }
.chip, .tool-chip { border-radius: 8px; background: var(--surface); font-size: .85rem; }
.chip:hover, .tool-chip:hover { transform: none; border-color: var(--border-strong); background: var(--surface-strong); }
.palette { border-radius: 12px; background: var(--bg-elev); border: 1px solid var(--border); }
.palette-backdrop { background: rgba(0, 0, 0, .45); backdrop-filter: none; }
.palette-list li { border-radius: 6px; }
.palette-list li.sel { background: var(--accent-soft); }
.footer { padding: 1rem; font-size: .8rem; }

/* ----- Home ----- */
.home-hero { padding: 1.5rem 0 1rem; }
.home-hero h1 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); margin: .6rem 0 .4rem; }
.home-hero .lead { margin: 0 0 1.25rem; }
.home-search { display: flex; gap: .5rem; align-items: center; max-width: 560px; }
.home-search .io { margin: 0; padding: .7rem .9rem; font-size: .95rem; }
.pill { border-radius: 6px; font-size: .78rem; padding: .25rem .6rem; }
.tabs { display: flex; flex-wrap: wrap; gap: .25rem; margin: 1.5rem 0 1rem; border-bottom: 1px solid var(--border); }
.tab {
    display: inline-flex; align-items: center; gap: .45rem; padding: .55rem .8rem; margin-bottom: -1px;
    background: none; border: 0; border-bottom: 2px solid transparent; color: var(--muted);
    font: inherit; font-size: .88rem; cursor: pointer;
}
.tab:hover { color: var(--text); }
.tab.on { color: var(--text); border-bottom-color: var(--accent); font-weight: 500; }
.tab .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cat, var(--muted)); }
.tab .count { font-size: .75rem; color: var(--muted); }
.quick { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: .75rem; margin-top: 1rem; }
.quick-box { padding: .9rem 1rem; border-radius: 10px; }
.quick-box h2 { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 .5rem; }
.quick-box .chip-row { margin: 0; }
.section-title { font-size: .95rem; color: var(--text); margin: 1.75rem 0 .75rem; }

/* ===== Color polish ===== */
:root, [data-theme="dark"] { --accent: #7c5cff; --accent-2: #22d3ee; --accent-3: #f472b6; --accent-soft: rgba(124, 92, 255, .16); }
[data-theme="light"] { --accent: #6d4aff; --accent-2: #0891b2; --accent-3: #db2777; --accent-soft: rgba(109, 74, 255, .10); }
.cat-format   { --cat: #8b5cf6; }
.cat-encode   { --cat: #06b6d4; }
.cat-generate { --cat: #10b981; }
.cat-convert  { --cat: #f59e0b; }
.cat-inspect  { --cat: #ec4899; }
.cat-engineering { --cat: #ef4444; }

.topbar::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), var(--accent-3), transparent); opacity: .7;
}
.gradient-text {
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.home-hero h1 {
    background: linear-gradient(90deg, var(--text) 30%, var(--accent) 70%, var(--accent-2));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.btn { background: linear-gradient(135deg, var(--accent), #5b8cff); color: #fff; }
.btn:hover { opacity: 1; filter: brightness(1.08); }

/* Sidebar groups: colored pills, tool rows indented */
.nav-group {
    margin: .7rem 0 .2rem; padding: .4rem .55rem; border-radius: 8px;
    color: var(--text) !important; font-size: .7rem; letter-spacing: .1em;
    background: color-mix(in srgb, var(--cat, var(--muted)) 10%, transparent);
    border-left: 3px solid var(--cat, var(--border));
}
.nav-group:hover { background: color-mix(in srgb, var(--cat, var(--muted)) 18%, transparent); }
.nav-group .count {
    background: color-mix(in srgb, var(--cat, var(--muted)) 22%, transparent); color: var(--cat);
    padding: .05rem .45rem; border-radius: 999px; font-weight: 600; opacity: 1;
}
.nav-group .chev { color: var(--cat); }
.nav-group .dot { display: none; }
.nav-group ~ a { margin-left: .35rem; }
.sidebar a.active {
    background: linear-gradient(90deg, var(--accent-soft), transparent);
    box-shadow: inset 2px 0 0 var(--accent);
}
.sidebar a.active .nav-icon { background: var(--accent); color: #fff; border-color: var(--accent); }
.side-section { color: var(--accent); }
.sidebar.collapsed .nav-group { background: none; border-left: 0; border-top: 2px solid var(--cat); }
.sidebar.collapsed .nav-group ~ a { margin-left: 0; }

/* Popular cards */
.popular-card { border-top: 2px solid var(--cat, var(--accent)); }
.popular-card .card-icon, .board-item .nav-icon { color: var(--cat); }
.popular-card .card-icon { background: color-mix(in srgb, var(--cat, var(--accent)) 14%, transparent); border-color: transparent; }

/* All-tools board: every tool visible at once */
.board { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: .75rem; align-items: start; }
.board-col {
    border: 1px solid var(--border); border-top: 3px solid var(--cat);
    border-radius: 12px; padding: .5rem; background: var(--surface);
}
.board-head {
    display: flex; align-items: center; gap: .45rem; padding: .35rem .45rem .5rem;
    font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em; color: var(--cat);
}
.board-head .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cat); }
.board-head .count {
    margin-left: auto; font-size: .7rem; letter-spacing: 0; padding: .05rem .45rem; border-radius: 999px;
    background: color-mix(in srgb, var(--cat) 16%, transparent);
}
.board-item {
    display: flex; align-items: center; gap: .55rem; padding: .32rem .45rem; border-radius: 7px;
    color: var(--text); font-size: .86rem; transition: background .12s;
}
.board-item:hover { background: color-mix(in srgb, var(--cat) 12%, transparent); }
.board-item:hover .nav-icon { border-color: var(--cat); }
.board-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.board-star { color: #facc15; font-size: .8rem; }

/* ===== Hero redesign ===== */
.home-hero {
    position: relative; overflow: hidden; isolation: isolate;
    padding: 2.5rem 2.25rem 2.25rem; border-radius: 18px;
    border: 1px solid var(--border);
    background:
        radial-gradient(120% 140% at 0% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 55%),
        radial-gradient(90% 120% at 100% 100%, color-mix(in srgb, var(--accent-2) 12%, transparent), transparent 60%),
        var(--surface);
    box-shadow: var(--shadow);
}
.hero-grid {
    position: absolute; inset: 0; z-index: -1; opacity: .5;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 28px 28px;
    mask-image: radial-gradient(ellipse at 80% 20%, #000 10%, transparent 65%);
    -webkit-mask-image: radial-gradient(ellipse at 80% 20%, #000 10%, transparent 65%);
}
.hero-glow {
    position: absolute; z-index: -1; width: 340px; height: 340px; right: -80px; top: -120px; border-radius: 50%;
    background: conic-gradient(from 180deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
    filter: blur(80px); opacity: .28;
}
.hero-inner { position: relative; max-width: 760px; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: .5rem; padding: .3rem .75rem; border-radius: 999px;
    font-size: .78rem; font-weight: 500; color: var(--text);
    background: color-mix(in srgb, var(--surface) 70%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--border));
}
.live-dot {
    width: 7px; height: 7px; border-radius: 50%; background: #10b981;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, .6); animation: livePulse 2s infinite;
}
@keyframes livePulse { 70% { box-shadow: 0 0 0 7px rgba(16, 185, 129, 0); } 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); } }
.home-hero h1 {
    background: none; color: var(--text); -webkit-background-clip: initial; background-clip: initial;
    font-size: clamp(1.9rem, 4vw, 2.9rem); font-weight: 700; letter-spacing: -.035em; line-height: 1.1; margin: 1rem 0 .6rem;
}
.hero-accent {
    background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
    -webkit-background-clip: text; background-clip: text; color: transparent;
}
.home-hero .lead { font-size: 1.05rem; margin: 0 0 1.5rem; }
.home-search {
    position: relative; max-width: 580px; padding: 4px; border-radius: 12px;
    background: var(--bg-elev); border: 1px solid var(--border-strong);
    box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 12%, transparent);
    transition: border-color .15s, box-shadow .15s;
}
.home-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.home-search .search-ico { padding-left: .7rem; font-size: 1.2rem; color: var(--muted); }
.home-search .io { flex: 1; border: 0; background: transparent; box-shadow: none !important; padding: .65rem .4rem; font-size: 1rem; }
.home-search kbd {
    margin-right: .45rem; font: 500 .72rem "Inter", system-ui; padding: .2rem .45rem; border-radius: 6px;
    border: 1px solid var(--border); background: var(--surface-strong); color: var(--muted); white-space: nowrap;
}
.hero-stats { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; list-style: none; padding: 0; margin: 1.25rem 0 0; font-size: .84rem; color: var(--muted); }
.hero-stats li { display: inline-flex; align-items: center; gap: .4rem; }

/* ===== Sidebar filter ===== */
.side-filter-wrap { position: relative; flex: 1; min-width: 0; display: flex; align-items: center; }
.side-filter-ico { position: absolute; left: .6rem; font-size: 1rem; color: var(--muted); pointer-events: none; transition: color .15s; }
.side-filter-wrap .side-filter {
    width: 100%; padding: .5rem 1.9rem .5rem 1.9rem; border-radius: 10px; font-size: .85rem;
    border: 1px solid var(--border);
    background: linear-gradient(var(--surface), var(--surface)) padding-box,
                linear-gradient(90deg, var(--border), var(--border)) border-box;
    transition: border-color .15s, box-shadow .15s, background .15s;
}
.side-filter-wrap .side-filter:hover { border-color: var(--border-strong); }
.side-filter-wrap .side-filter:focus {
    outline: none; border-color: transparent;
    background: linear-gradient(var(--bg-elev), var(--bg-elev)) padding-box,
                linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3)) border-box;
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.side-filter-wrap:focus-within .side-filter-ico { color: var(--accent); }
.side-filter-clear {
    position: absolute; right: .35rem; width: 22px; height: 22px; border-radius: 6px; border: 0;
    background: var(--surface-strong); color: var(--muted); font-size: .7rem; cursor: pointer;
}
.side-filter-clear:hover { background: var(--accent-soft); color: var(--text); }
.side-head { padding-bottom: .5rem; border-bottom: 1px solid var(--border); }

/* ===== Collapse button ===== */
.collapse-btn {
    flex: none; display: inline-grid; place-items: center; width: 34px; height: 34px; padding: 0;
    border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--muted);
    cursor: pointer; transition: color .15s, background .15s, border-color .15s, box-shadow .15s;
}
.collapse-btn:hover {
    color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    background: var(--accent-soft); box-shadow: 0 0 0 3px var(--accent-soft);
}
.collapse-btn:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.collapse-btn .collapse-chev { transform-origin: 14px 12px; transition: transform .25s ease; }
.sidebar.collapsed .collapse-btn .collapse-chev { transform: rotate(180deg); }

/* ===== Hero: no box ===== */
.home-hero { background: none; border: 0; box-shadow: none; border-radius: 0; padding: 1.5rem 0 1rem; overflow: visible; }
.hero-grid, .hero-glow { display: none; }

/* ===== Mobile menu ===== */
.nav-backdrop { display: none; }
.burger { position: relative; display: inline-block; width: 16px; height: 12px; }
.burger i {
    position: absolute; left: 0; width: 100%; height: 2px; border-radius: 2px; background: currentColor;
    transition: transform .25s ease, opacity .2s ease, top .25s ease;
}
.burger i:nth-child(1) { top: 0; }
.burger i:nth-child(2) { top: 5px; }
.burger i:nth-child(3) { top: 10px; }
.menu-btn.on .burger i:nth-child(1) { top: 5px; transform: rotate(45deg); }
.menu-btn.on .burger i:nth-child(2) { opacity: 0; }
.menu-btn.on .burger i:nth-child(3) { top: 5px; transform: rotate(-45deg); }
.menu-btn { color: var(--text); display: none; place-items: center; }

@media (max-width: 800px) {
    /* Top bar */
    .topbar { padding: .5rem .75rem; gap: .5rem; }
    .menu-btn { display: inline-grid; }
    .tagline { display: none; }
    .search-btn { margin-left: auto; width: 34px; height: 34px; padding: 0; justify-content: center; border-radius: 8px; }

    /* Drawer */
    .sidebar {
        width: min(300px, 86vw); top: 56px; height: calc(100dvh - 56px); max-height: none;
        border-radius: 0 14px 14px 0; border-right: 1px solid var(--border); z-index: 30;
        transition: transform .28s cubic-bezier(.2, .8, .2, 1);
    }
    .sidebar.open { box-shadow: 0 20px 50px rgba(0, 0, 0, .35); }
    .sidebar.collapsed { width: min(300px, 86vw); }
    .sidebar a { padding: .6rem .6rem; font-size: .95rem; }
    .nav-group { padding: .55rem .6rem; }
    .side-filter-wrap .side-filter { padding-top: .65rem; padding-bottom: .65rem; font-size: 16px; }
    .side-head { top: -.75rem; }
    .nav-backdrop {
        display: block; position: fixed; inset: 56px 0 0 0; z-index: 25;
        background: rgba(0, 0, 0, .45); backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px);
        opacity: 0; pointer-events: none; transition: opacity .25s;
    }
    .nav-backdrop.show { opacity: 1; pointer-events: auto; }

    /* Hero */
    .home-hero { padding: .75rem 0 .5rem; }
    .home-hero h1 { font-size: 1.85rem; margin: .75rem 0 .5rem; }
    .home-hero .lead { font-size: .95rem; margin-bottom: 1.1rem; }
    .hero-eyebrow { font-size: .72rem; }
    .home-search .io { font-size: 16px; }
    .hero-stats { gap: .4rem; }
    .hero-stats li {
        padding: .3rem .6rem; border-radius: 999px; font-size: .78rem;
        background: var(--surface); border: 1px solid var(--border);
    }

    /* Quick chips: horizontal scroll instead of wrapping */
    .quick { grid-template-columns: 1fr; }
    .quick-box .chip-row { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; padding-bottom: .15rem; }
    .quick-box .chip-row::-webkit-scrollbar { display: none; }
    .tool-chip { flex: none; }

    /* Cards */
    .grid, .grid.popular { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .6rem; }
    .card { padding: .85rem; }
    .card p { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .board { grid-template-columns: 1fr; }
    .board-item { padding: .5rem .5rem; }
    .section-title { margin: 1.4rem 0 .6rem; }
}

@media (max-width: 420px) {
    .grid, .grid.popular { grid-template-columns: 1fr; }
    .brand span { font-size: .95rem; }
}

@media (max-width: 800px) {
    .sidebar { top: 56px; }
    .search-btn { min-width: 0; }
    .search-btn span, .search-btn kbd { display: none; }
    .content { padding: 1rem; }
    .home-hero { padding: 1rem 0; }
    .home-search kbd { display: none; }
}

/* ===== Highlighted buttons (all pages) ===== */
.btn, .toolbar button, .content button:not(.tab):not(.icon-btn):not(.search-btn) {
    font-size: .95rem; font-weight: 600; letter-spacing: .01em;
    padding: .6rem 1.2rem;
    text-shadow: 0 0 8px rgba(255, 255, 255, .35);
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 40%, transparent), 0 4px 16px color-mix(in srgb, var(--accent) 45%, transparent);
    transition: box-shadow .2s, filter .2s, transform .15s;
}
.btn:hover, .toolbar button:hover, .content button:not(.tab):not(.icon-btn):not(.search-btn):hover {
    filter: brightness(1.1); transform: translateY(-1px);
    box-shadow: 0 0 0 1px var(--accent), 0 6px 24px color-mix(in srgb, var(--accent) 65%, transparent), 0 0 18px color-mix(in srgb, var(--accent-2) 35%, transparent);
}
.btn.secondary { text-shadow: none; box-shadow: 0 0 0 1px var(--border-strong), 0 2px 10px color-mix(in srgb, var(--accent) 20%, transparent); }
.btn.secondary:hover { box-shadow: 0 0 0 1px var(--accent), 0 4px 16px color-mix(in srgb, var(--accent) 35%, transparent); }
.btn:disabled, .content button:disabled { box-shadow: none; text-shadow: none; transform: none; filter: none; }

/* ===== Mobile refinements ===== */
html, body { overflow-x: hidden; -webkit-text-size-adjust: 100%; }
img, svg, canvas, video { max-width: 100%; }

@media (max-width: 800px) {
    .topbar { padding-left: max(.75rem, env(safe-area-inset-left)); padding-right: max(.75rem, env(safe-area-inset-right)); }
    .brand { min-width: 0; }
    .brand > span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .theme-toggle, .menu-btn, .search-btn { flex: none; width: 40px; height: 40px; }

    .content { padding: 1rem .9rem 2rem; width: 100%; }
    h1 { font-size: 1.35rem; line-height: 1.25; }
    .tool-header { gap: .5rem; align-items: flex-start; }
    .tool-header h1 { margin: .25rem 0; }

    /* Prevent iOS zoom on focus and give fields room */
    .io, input, select, textarea { font-size: 16px; max-width: 100%; }
    textarea.io { min-height: 9rem; }

    /* Toolbars: wrap cleanly, larger tap targets */
    .toolbar { gap: .5rem; }
    .toolbar label { flex-wrap: wrap; }
    .toolbar select, .toolbar input:not([type=checkbox]):not([type=radio]) { min-height: 40px; }
    .btn, .toolbar button, .content button:not(.tab):not(.icon-btn):not(.search-btn) {
        min-height: 42px; padding: .55rem .95rem; font-size: .92rem;
    }

    /* Tabs scroll horizontally instead of wrapping */
    .tabs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
    .tabs::-webkit-scrollbar { display: none; }
    .tab { flex: none; white-space: nowrap; }

    /* Wide content scrolls inside its box rather than the page */
    .table { display: block; overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch; }
    .code, pre, .diff, .markdown-body { max-width: 100%; overflow-x: auto; }
    .markdown-body { min-height: 12rem; }
    .result-row { padding: .75rem; }
    code.big { font-size: 1.1rem; word-break: break-all; }
    .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; }
    .stat strong { font-size: 1.25rem; }
    .dropzone { padding: 1.25rem; }
    .legal { padding: 1rem; }
    .help { margin-top: 1.25rem; padding: .85rem 1rem; }

    /* Command palette: top-anchored, full-width */
    .palette-backdrop { padding-top: calc(env(safe-area-inset-top) + .75rem); }
    .palette { width: calc(100vw - 1.5rem); }
    .palette-list { max-height: 65dvh; }
    .palette-list li { padding: .7rem .75rem; }

    .footer { padding: 1rem 1rem calc(1rem + env(safe-area-inset-bottom)); font-size: .8rem; }
    .footer-links { display: flex; justify-content: center; gap: 1.25rem; margin-bottom: .4rem; }
    .footer-links a { padding: .35rem 0; }
}

@media (max-width: 420px) {
    .brand .logo { width: 22px; height: 22px; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .toolbar > .btn, .toolbar > button { flex: 1 1 auto; }
}