:root {
    --bg: #16171b;
    --bg-sidebar: #1b1c20;
    --bg-card: #202126;
    --bg-card-hover: #25262c;
    --bg-input: #26272d;
    --border: #2c2d33;
    --border-hover: #3fb28f;
    --text-primary: #e8e9ec;
    --text-secondary: #9a9ba3;
    --text-muted: #6b6c74;
    --accent: #3fb28f;
    --accent-soft: rgba(63, 178, 143, 0.14);
    --accent-2: #7c5cff;
    --shadow: 0 8px 24px rgba(0,0,0,0.35);
    --radius: 10px;
    --sidebar-w: 260px;
}

[data-theme="light"] {
    --bg: #f5f6f8;
    --bg-sidebar: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #fbfcfd;
    --bg-input: #eef0f3;
    --border: #e2e4e9;
    --border-hover: #3fb28f;
    --text-primary: #1c1d22;
    --text-secondary: #5a5c66;
    --text-muted: #8b8d96;
    --accent: #299d7c;
    --accent-soft: rgba(41, 157, 124, 0.10);
    --shadow: 0 8px 24px rgba(30,30,40,0.08);
}

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

html, body {
    height: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    transition: background 0.2s ease, color 0.2s ease;
}

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

.app {
    display: flex;
    min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 20;
    transition: transform 0.25s ease, background 0.2s ease, border-color 0.2s ease;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 22px 20px 18px;
}

.brand-mark {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--accent) 0%, #2a8f70 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0d130f;
    font-size: 15px;
    box-shadow: 0 4px 14px rgba(63,178,143,0.35);
}

.brand-name {
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.brand-name em {
    font-style: normal;
    color: var(--accent);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
    min-width: 0;
    gap: 1px;
}

.brand-company {
    font-size: 0.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
}

.brand-product {
    font-size: 0.92rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    white-space: nowrap;
}

.fav-star {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.85rem;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s ease, transform 0.12s ease, fill 0.15s ease;
    flex-shrink: 0;
    z-index: 2;
}
.fav-star .fav-star-svg {
    width: 1em;
    height: 1em;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linejoin: round;
    transition: fill 0.15s ease, stroke 0.15s ease;
}
.fav-star:hover { color: #e8b93f; transform: scale(1.15); }
.fav-star.is-fav { color: #e8b93f; }
.fav-star.is-fav .fav-star-svg {
    fill: currentColor;
    stroke: currentColor;
}

.side-link-row {
    display: flex;
    align-items: center;
    gap: 0;
}
.side-link-row .side-link { flex: 1; min-width: 0; }
.side-link-row .fav-star { margin-right: 4px; font-size: 0.72rem; }

.tool-card .fav-star {
    position: absolute;
    bottom: 12px;
    right: 14px;
    font-size: 1.05rem;
    border-radius: 6px;
    background: var(--bg-card-hover);
    border: 1px solid var(--border);
    width: 30px;
    height: 30px;
}
.tool-card .fav-star:hover { background: var(--bg-input); border-color: #e8b93f; }

#favoritesSection.is-empty { display: none; }

.side-search {
    margin: 4px 16px 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 9px 12px;
}

.side-search i {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.side-search input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.85rem;
    width: 100%;
    font-family: inherit;
}

.side-search input::placeholder { color: var(--text-muted); }

.side-nav {
    flex: 1;
    overflow-y: auto;
    padding: 4px 12px 12px;
}

.side-category {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-weight: 700;
    margin: 18px 10px 6px;
}

.side-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 7px;
    font-size: 0.87rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.side-link i {
    width: 16px;
    text-align: center;
    font-size: 0.85rem;
}

.side-link:hover {
    background: var(--accent-soft);
    color: var(--text-primary);
}

.side-link.active {
    background: var(--accent-soft);
    color: var(--accent);
}

.side-footer {
    padding: 14px 16px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    flex-shrink: 0;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

.side-footer-link {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.side-footer-link:hover { color: var(--accent); }

.side-footer-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    margin-top: 2px;
}

.side-footer-dot { color: var(--text-muted); font-size: 0.7rem; }

/* ── About / Privacy modal (site-wide) ───────────────────────── */
.ict-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(10, 8, 4, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 16px;
}

.ict-modal-backdrop.open { display: flex; }

.ict-modal {
    background: var(--bg-card);
    width: 100%;
    max-width: 460px;
    max-height: 85vh;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    animation: ictModalIn 0.2s ease;
    overflow: hidden;
}

@keyframes ictModalIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.ict-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.ict-modal-header h2 {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.ict-about-mark {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border-radius: 7px;
    background: linear-gradient(135deg, var(--accent) 0%, #2a8f70 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0d130f;
    box-shadow: 0 4px 14px rgba(63,178,143,0.35);
}

.ict-modal-close {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.ict-modal-close:hover { background: var(--text-primary); color: var(--bg-card); border-color: var(--text-primary); }

.ict-modal-body {
    padding: 20px 22px;
    overflow-y: auto;
}

.ict-about-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    padding: 9px 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.85rem;
}
.ict-about-row:last-of-type { border-bottom: none; }
.ict-about-row .label { color: var(--text-muted); flex-shrink: 0; }
.ict-about-row .value { color: var(--text-primary); font-weight: 600; text-align: right; }
.ict-about-row .value a { color: var(--accent); }

.ict-about-copyright {
    margin-top: 14px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.ict-about-warning {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: 8px;
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: #ff8f8f;
    font-size: 0.76rem;
    line-height: 1.6;
    display: flex;
    gap: 9px;
    align-items: flex-start;
}
.ict-about-warning i { margin-top: 2px; flex-shrink: 0; }

.ict-about-footer-link {
    margin-top: 16px;
    text-align: center;
    font-size: 0.8rem;
}
.ict-about-footer-link a { color: var(--accent); }

.sidebar-burger {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 30;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

/* ---------- Main ---------- */
.main {
    margin-left: var(--sidebar-w);
    flex: 1;
    padding: 56px 48px 40px;
    max-width: 1080px;
}

.hero {
    max-width: 700px;
    margin-bottom: 46px;
}

.hero-eyebrow {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 5px 10px;
    border-radius: 20px;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 14px;
}

.hero h1 span { color: var(--accent); }

.hero p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 560px;
    margin-bottom: 26px;
}

.hero-search {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 18px;
    max-width: 520px;
    box-shadow: var(--shadow);
}

.hero-search i { color: var(--text-muted); }

.hero-search input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.92rem;
    width: 100%;
    font-family: inherit;
}

.hero-search input::placeholder { color: var(--text-muted); }

.tool-section { margin-bottom: 40px; }

.section-title {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-title i { color: var(--accent); font-size: 0.85rem; }

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.tool-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 18px 46px 18px;
    position: relative;
    transition: border-color 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

.tool-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.tool-icon {
    width: 42px;
    height: 42px;
    border-radius: 9px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: #0d130f;
}

.pdf-icon { background: linear-gradient(135deg, #ff8a65 0%, #e0523a 100%); }
.lang-icon { background: linear-gradient(135deg, #4ecdc4 0%, #2a8f70 100%); }
.age-icon { background: linear-gradient(135deg, #b39dff 0%, #7c5cff 100%); }

.tool-text h3 {
    font-size: 0.97rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.tool-text p {
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.tool-tag {
    position: absolute;
    top: 14px;
    right: 14px;
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 3px 7px;
    border-radius: 5px;
}

.empty-state {
    display: none;
    text-align: center;
    color: var(--text-muted);
    padding: 60px 0;
    font-size: 0.92rem;
}

.page-footer {
    margin-top: 50px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.78rem;
}

/* ---------- Tool page ---------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 18px;
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 0.65rem; }

.tool-page-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 30px;
}

.tool-page-header .tool-icon {
    width: 50px;
    height: 50px;
    font-size: 1.35rem;
    border-radius: 12px;
}

.tool-page-header h1 {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.tool-page-header p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    max-width: 560px;
    line-height: 1.55;
}

.json-icon { background: linear-gradient(135deg, #7fa8ff 0%, #3f63d1 100%); }
.case-icon { background: linear-gradient(135deg, #ff8fb8 0%, #d1477a 100%); }
.word-icon { background: linear-gradient(135deg, #ffcb7c 0%, #e08a2b 100%); }
.sort-icon { background: linear-gradient(135deg, #7ee0c3 0%, #299d7c 100%); }
.unit-icon { background: linear-gradient(135deg, #9db4ff 0%, #4a5fd1 100%); }
.yt-icon { background: linear-gradient(135deg, #ff6b6b 0%, #c62828 100%); }
.color-icon { background: linear-gradient(135deg, #ffb3f0 0%, #a34bd6 100%); }
.password-icon { background: linear-gradient(135deg, #ffd27e 0%, #d18f2b 100%); }
.base64-icon { background: linear-gradient(135deg, #8fe0ff 0%, #2b8fbf 100%); }
.img-icon { background: linear-gradient(135deg, #a8e88f 0%, #4f9d2b 100%); }
.uuid-icon { background: linear-gradient(135deg, #c3a8ff 0%, #6a3fd1 100%); }
.qr-icon { background: linear-gradient(135deg, #2b2b2e 0%, #000000 100%); }
.hash-icon { background: linear-gradient(135deg, #ff9d9d 0%, #c1382e 100%); }
.scanner-icon { background: linear-gradient(135deg, #8ce0ff 0%, #1f7fb0 100%); }
.encryption-icon { background: linear-gradient(135deg, #b48cff 0%, #5a2fb0 100%); }
.net-icon { background: linear-gradient(135deg, #7ee0e0 0%, #1f8f8f 100%); }
.toml-icon { background: linear-gradient(135deg, #ffb37e 0%, #cc6a1f 100%); }
.watermark-icon { background: linear-gradient(135deg, #a8c8ff 0%, #4a6fd1 100%); }
.instagram-icon { background: linear-gradient(135deg, #f8a8d8 0%, #b03fa0 100%); }
.video-icon { background: linear-gradient(135deg, #ff9d6c 0%, #c1440e 100%); }
.whatsapp-icon { background: linear-gradient(135deg, #25d366 0%, #075e54 100%); }

.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
    margin-bottom: 22px;
}

.panel-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.panel-toolbar .spacer { flex: 1; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 9px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn:active { transform: translateY(1px); }

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #0b120e;
}

.btn-primary:hover { background: #379d80; border-color: #379d80; color: #0b120e; }

.btn-sm { padding: 6px 10px; font-size: 0.75rem; }

.btn.is-active {
    background: var(--accent-soft);
    border-color: var(--accent);
    color: var(--accent);
}

select.select,
.select {
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 500;
    padding: 9px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
}

.text-input {
    width: 100%;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.15s ease;
}
.text-input:focus { border-color: var(--accent); }
.text-input[readonly] { background: var(--bg-card); color: var(--accent); font-weight: 700; cursor: default; }

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

@media (max-width: 780px) {
    .grid-2 { grid-template-columns: 1fr; }
}

.field-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

textarea.code-input {
    width: 100%;
    min-height: 260px;
    resize: vertical;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.83rem;
    line-height: 1.6;
    outline: none;
    transition: border-color 0.15s ease;
}

textarea.code-input:focus { border-color: var(--accent); }

textarea.code-input::placeholder { color: var(--text-muted); }

.code-output {
    width: 100%;
    min-height: 260px;
    max-height: 480px;
    overflow: auto;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.83rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--text-primary);
}

.code-output:empty::before {
    content: attr(data-placeholder);
    color: var(--text-muted);
}

/* JSON syntax highlight tokens */
.jk { color: #7fa8ff; }
.js-str { color: var(--accent); }
.js-num { color: #ffcb7c; }
.js-bool { color: #ff8fb8; }
.js-null { color: #ff6b6b; }
.js-punc { color: var(--text-muted); }

.alert {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 8px;
    font-size: 0.82rem;
    line-height: 1.5;
    margin-bottom: 14px;
}

.alert-error {
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.35);
    color: #ff8f8f;
}

.alert-success {
    background: var(--accent-soft);
    border: 1px solid var(--accent);
    color: var(--accent);
}

.alert i { margin-top: 2px; }

.stat-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.stat-pill {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 16px;
    min-width: 100px;
}

.stat-pill .stat-value {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.stat-pill .stat-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.tool-version {
    margin-top: 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    color: var(--text-muted);
}

.case-btn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 18px;
}

.case-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 14px;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.case-btn:hover { border-color: var(--accent); background: var(--accent-soft); }

.case-btn .case-btn-title {
    font-size: 0.83rem;
    font-weight: 700;
    color: var(--text-primary);
}

.case-btn .case-btn-sample {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

/* ── Checkbox options row (List Sorter, etc.) ───────────────── */
.check-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin-bottom: 18px;
}

.check-pill {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.check-pill input[type="checkbox"] {
    width: 15px;
    height: 15px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* ── Swap button (Unit Converter, Color Picker) ─────────────── */
.swap-row {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 4px 0;
}

@media (min-width: 781px) {
    .swap-row { margin: 0 -6px; }
}

.swap-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.swap-btn:hover { border-color: var(--accent); color: var(--accent); transform: rotate(180deg); }

/* ── Category picker grid (Unit Converter) ──────────────────── */
.cat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 22px;
}

@media (max-width: 780px) { .cat-grid { grid-template-columns: repeat(2, 1fr); } }

.cat-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 7px;
    padding: 14px 8px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 600;
    transition: all 0.15s ease;
}

.cat-btn i { font-size: 1.1rem; color: var(--text-muted); transition: color 0.15s ease; }
.cat-btn:hover { border-color: var(--accent); }
.cat-btn.is-active { border-color: var(--accent); background: var(--accent-soft); color: var(--text-primary); }
.cat-btn.is-active i { color: var(--accent); }

/* ── Color Picker & Converter ────────────────────────────────── */
.color-preview-row {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.color-swatch-lg {
    width: 84px;
    height: 84px;
    border-radius: 14px;
    border: 1px solid var(--border);
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.native-color-input {
    -webkit-appearance: none;
    appearance: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: none;
    cursor: pointer;
    padding: 0;
}
.native-color-input::-webkit-color-swatch-wrapper { padding: 0; }
.native-color-input::-webkit-color-swatch { border: none; border-radius: 9px; }

.hex-input-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 180px;
}

.hex-input-wrap input {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    outline: none;
}
.hex-input-wrap input:focus { border-color: var(--accent); }

.channel-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.channel-row label {
    width: 18px;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    flex-shrink: 0;
}

.channel-row input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
}

.channel-row input[type="number"] {
    width: 62px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    padding: 6px 8px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    outline: none;
}

.format-string {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-primary);
    margin-top: 4px;
}

.format-string button { flex-shrink: 0; }

.harmony-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
    gap: 12px;
}

.harmony-swatch {
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: transform 0.12s ease;
}

.harmony-swatch:hover { transform: translateY(-2px); }

.harmony-swatch .sw {
    height: 56px;
}

.harmony-swatch .lbl {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    text-align: center;
    padding: 5px 4px;
    background: var(--bg-card);
    color: var(--text-secondary);
}

/* ── Thumbnail grid (YouTube Thumbnail Downloader) ───────────── */
.yt-input-row {
    display: flex;
    gap: 10px;
    margin-bottom: 4px;
}

.yt-input-row input {
    flex: 1;
    font-family: inherit;
    font-size: 0.88rem;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    outline: none;
}
.yt-input-row input:focus { border-color: var(--accent); }

.yt-thumb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 22px;
}

.yt-thumb-card {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    background: var(--bg-input);
}

.yt-thumb-card .thumb-wrap {
    aspect-ratio: 16 / 9;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.yt-thumb-card img { width: 100%; height: 100%; object-fit: cover; display: block; }

.yt-thumb-card .thumb-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    gap: 8px;
}

.yt-thumb-card .thumb-name { font-size: 0.8rem; font-weight: 600; color: var(--text-primary); }
.yt-thumb-card .thumb-res { font-size: 0.7rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }

/* ── Segmented toggle (Base64, QR Generator mode switch) ─────── */
.seg-toggle {
    display: inline-flex;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 3px;
    gap: 3px;
    margin-bottom: 18px;
}

.seg-btn {
    padding: 7px 16px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.seg-btn.is-active { background: var(--accent); color: #0b120e; }
.seg-btn:hover:not(.is-active) { color: var(--text-primary); }

/* ── Range + numeric readout row (Password length, QR size, etc.) ── */
.range-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.range-row input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
}

.range-row .range-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 42px;
    text-align: right;
}

/* ── Generic drop zone (Image Compressor, etc.) ──────────────── */
.drop-zone {
    border: 1.5px dashed var(--border);
    border-radius: var(--radius);
    background: var(--bg-input);
    padding: 34px 18px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.drop-zone.drag-over { border-color: var(--accent); background: var(--accent-soft); }
.drop-zone i { font-size: 1.8rem; color: var(--accent); margin-bottom: 10px; display: block; }
.drop-zone .dz-title { font-weight: 600; font-size: 0.95rem; color: var(--text-primary); margin-bottom: 4px; }
.drop-zone .dz-hint { font-size: 0.78rem; color: var(--text-muted); }
.drop-zone input[type="file"] { display: none; }

/* ── Password strength meter ─────────────────────────────────── */
.strength-meter {
    display: flex;
    gap: 4px;
    margin: 10px 0 6px;
}

.strength-meter .seg {
    flex: 1;
    height: 5px;
    border-radius: 3px;
    background: var(--border);
    transition: background 0.2s ease;
}

.strength-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

/* ── Output list rows (UUID Generator, Hash Generator results) ── */
.result-row {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 8px;
}

.result-row .result-text {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    color: var(--text-primary);
    word-break: break-all;
}

.result-row .result-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    background: var(--bg-card);
    border-radius: 4px;
    padding: 2px 7px;
    flex-shrink: 0;
}

/* ── Before/after image comparison (Image Compressor) ────────── */
.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 20px;
}

@media (max-width: 680px) { .compare-grid { grid-template-columns: 1fr; } }

.compare-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-input);
}

.compare-card .cc-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.compare-card .cc-size { font-family: 'JetBrains Mono', monospace; color: var(--accent); font-weight: 700; text-transform: none; letter-spacing: 0; }

.compare-card .cc-img-wrap {
    background:
        linear-gradient(45deg, var(--bg-card) 25%, transparent 25%),
        linear-gradient(-45deg, var(--bg-card) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--bg-card) 75%),
        linear-gradient(-45deg, transparent 75%, var(--bg-card) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    max-height: 320px;
    overflow: hidden;
}

.compare-card img { max-width: 100%; max-height: 320px; object-fit: contain; display: block; }

/* ── QR preview panel ─────────────────────────────────────────── */
.qr-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    min-height: 260px;
}

.qr-preview canvas { max-width: 100%; height: auto; border-radius: 6px; }
.qr-preview .qr-empty { color: var(--text-muted); font-size: 0.85rem; text-align: center; }

.color-field { display: flex; align-items: center; gap: 10px; }
.color-field input[type="color"] { width: 38px; height: 38px; border-radius: 8px; border: 1px solid var(--border); background: none; cursor: pointer; padding: 0; }
.color-field input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.color-field input[type="color"]::-webkit-color-swatch { border: none; border-radius: 7px; }

/* ── JWT / decoded segment blocks ────────────────────────────── */
.jwt-segment { margin-bottom: 16px; }
.jwt-segment .seg-label {
    display: flex; align-items: center; gap: 8px;
    font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
    margin-bottom: 6px;
}
.jwt-segment .seg-dot { width: 8px; height: 8px; border-radius: 50%; }
.jwt-dot-header { background: #ff8fb8; }
.jwt-dot-payload { background: #7fa8ff; }
.jwt-dot-signature { background: #a8e88f; }

/* ── Tree view (JSON Visualizer) ──────────────────────────────── */
.json-tree { font-family: 'JetBrains Mono', monospace; font-size: 0.82rem; line-height: 1.7; }
.json-tree ul { list-style: none; margin: 0; padding-left: 20px; border-left: 1px dashed var(--border); }
.json-tree > ul { padding-left: 0; border-left: none; }
.json-tree li { position: relative; }
.tree-toggle {
    cursor: pointer; display: inline-flex; align-items: center; gap: 6px; user-select: none;
}
.tree-toggle .caret { font-size: 0.65rem; color: var(--text-muted); width: 10px; display: inline-block; transition: transform 0.15s ease; }
.tree-toggle.collapsed .caret { transform: rotate(-90deg); }
.tree-key { color: var(--accent); }
.tree-type { color: var(--text-muted); font-size: 0.7rem; margin-left: 6px; }
.tree-value-string { color: #ffcb7c; }
.tree-value-number { color: #7fa8ff; }
.tree-value-bool { color: #ff8fb8; }
.tree-value-null { color: var(--text-muted); font-style: italic; }
.tree-collapsed-children { display: none; }

/* ── Signature pad ────────────────────────────────────────────── */
.sig-pad-wrap {
    border: 1.5px dashed var(--border);
    border-radius: var(--radius);
    background: #ffffff;
    overflow: hidden;
    touch-action: none;
}
.sig-pad-wrap canvas { display: block; width: 100%; cursor: crosshair; }

/* ── Invoice preview / print ──────────────────────────────────── */
.invoice-preview {
    background: #ffffff;
    color: #1a1a1a;
    border-radius: var(--radius);
    padding: 36px;
    font-size: 0.85rem;
}
.invoice-preview table { width: 100%; border-collapse: collapse; margin: 18px 0; }
.invoice-preview th, .invoice-preview td { text-align: left; padding: 8px 6px; border-bottom: 1px solid #e2e2e2; font-size: 0.82rem; }
.invoice-preview th { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; color: #666; }
.invoice-preview .inv-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; flex-wrap: wrap; gap: 16px; }
.invoice-preview .inv-title { font-size: 1.6rem; font-weight: 800; letter-spacing: -0.01em; }
.invoice-preview .inv-totals { margin-left: auto; width: 240px; }
.invoice-preview .inv-totals div { display: flex; justify-content: space-between; padding: 4px 0; font-size: 0.85rem; }
.invoice-preview .inv-totals .grand { font-weight: 800; font-size: 1rem; border-top: 2px solid #1a1a1a; margin-top: 6px; padding-top: 8px; }

@media print {
    body * { visibility: hidden; }
    .invoice-preview, .invoice-preview * { visibility: visible; }
    .invoice-preview { position: fixed; inset: 0; padding: 24px; border-radius: 0; }
}

/* ── Favicon size grid ────────────────────────────────────────── */
.favicon-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 14px; margin-top: 18px; }
.favicon-card {
    border: 1px solid var(--border); border-radius: 10px; padding: 14px;
    display: flex; flex-direction: column; align-items: center; gap: 8px; background: var(--bg-input);
}
.favicon-card canvas {
    background:
        linear-gradient(45deg, var(--bg-card) 25%, transparent 25%),
        linear-gradient(-45deg, var(--bg-card) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--bg-card) 75%),
        linear-gradient(-45deg, transparent 75%, var(--bg-card) 75%);
    background-size: 12px 12px;
    background-position: 0 0, 0 6px, 6px -6px, -6px 0px;
    border-radius: 4px;
}
.favicon-card .fc-label { font-size: 0.72rem; color: var(--text-secondary); font-family: 'JetBrains Mono', monospace; }

/* ── Piano-style frequency readout (Tone Generator) ──────────── */
.freq-display {
    text-align: center; padding: 30px 16px; background: var(--bg-input); border: 1px solid var(--border);
    border-radius: var(--radius); margin-bottom: 18px;
}
.freq-display .hz { font-family: 'JetBrains Mono', monospace; font-size: 2.2rem; font-weight: 700; color: var(--accent); }
.freq-display .note { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

/* ── EXIF data table ──────────────────────────────────────────── */
.exif-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.exif-table tr { border-bottom: 1px solid var(--border); }
.exif-table td { padding: 8px 10px; }
.exif-table td:first-child { color: var(--text-muted); font-family: 'JetBrains Mono', monospace; font-size: 0.75rem; white-space: nowrap; width: 40%; }
.exif-table td:last-child { color: var(--text-primary); word-break: break-word; }

.toast {
    position: fixed;
    bottom: 26px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-card);
    border: 1px solid var(--accent);
    color: var(--text-primary);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.83rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 100;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast i { color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); box-shadow: var(--shadow); }
    .sidebar-burger { display: flex; }
    .main { margin-left: 0; padding: 90px 22px 40px; }
    .hero h1 { font-size: 1.9rem; }
}