/* ============================================================
   CSS Variables & Theme Definitions
   ============================================================ */
:root {
    /* ── Light theme (refreshed from toolstack style) ── */
    --bg-body: #ffffff;
    --bg-sidebar: #ffffff;
    --bg-topbar: rgba(255, 255, 255, 0.80);
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --text-primary: #0b1120;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-card-title: #0b1120;
    --border-color: #EBEBEE;
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.02), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-sidebar: 1px 0 12px rgba(0, 0, 0, 0.02);
    --shadow-topbar: 0 1px 4px rgba(0, 0, 0, 0.02);
    --accent: #4f46e5;
    --accent-light: #eef2ff;
    --accent-hover: #4338ca;
    --accent-soft: #d1d5f0;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --logo-color: #4f46e5;
    --menu-active-bg: #eef2ff;
    --menu-active-color: #4f46e5;
    --scrollbar-track: #f1f5f9;
    --scrollbar-thumb: #cbd5e1;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --toast-bg: #0b1120;
    --toast-text: #f8fafc;
}

/* ── Dark theme (pure black) ── */
[data-theme="dark"] {
    --bg-body: #0b1120;
    --bg-sidebar: #121829;
    --bg-topbar: rgba(11, 17, 32, 0.85);
    --bg-card: #1a1f33;
    --bg-card-hover: #242b44;
    --text-primary: #e8edf5;
    --text-secondary: #a8b5d4;
    --text-muted: #7a88aa;
    --text-card-title: #e8edf5;
    --border-color: #2a3350;
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-sidebar: 1px 0 12px rgba(0, 0, 0, 0.4);
    --shadow-topbar: 0 1px 4px rgba(0, 0, 0, 0.3);
    --accent: #818cf8;
    --accent-light: #1e2440;
    --accent-hover: #6366f1;
    --accent-soft: #2a3350;
    --logo-color: #a5b4fc;
    --menu-active-bg: #1e2440;
    --menu-active-color: #a5b4fc;
    --scrollbar-track: #121829;
    --scrollbar-thumb: #2a3350;
    --toast-bg: #e8edf5;
    --toast-text: #0b1120;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg-body);
    color: var(--text-primary);
    display: flex;
    min-height: 100vh;
    transition: background var(--transition), color var(--transition);
    overflow: hidden;
    height: 100vh;
}

::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    transition: background var(--transition);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 8px;
    transition: background var(--transition);
}

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

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

.gap-2 {
    gap: .5rem !important;
}
.gap-3 {
    gap: 1rem !important;
}

.align-items-center {
    align-items: center !important;
}

.d-flex {
    display: flex !important;
}

.mb-3 {
    margin-bottom: 1rem !important;
}
.mb-4 {
    margin-bottom: 1.5rem !important;
}
.mt-3 {
    margin-top: 1rem !important;
}
.mt-5 {
    margin-top: 2.5rem !important;
}

.form-label {
    display: inline-block;
    margin-bottom: .5rem;
}

.form-control {
    display: block;
    width: 100%;
    padding: .375rem .75rem;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--bs-body-color);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-color: var(--bs-body-bg);
    background-clip: padding-box;
    border: var(--bs-border-width) solid var(--bs-border-color);
    border-radius: var(--bs-border-radius);
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

.row {
    --bs-gutter-x: 1.5rem;
    --bs-gutter-y: 0;
    display: flex;
    flex-wrap: wrap;
    margin-top: calc(-1 * var(--bs-gutter-y));
    margin-right: calc(-.5 * var(--bs-gutter-x));
    margin-left: calc(-.5 * var(--bs-gutter-x));
}

.row>* {
    flex-shrink: 0;
    width: 100%;
    max-width: 100%;
    padding-right: calc(var(--bs-gutter-x) * .5);
    padding-left: calc(var(--bs-gutter-x) * .5);
    margin-top: var(--bs-gutter-y);
}

.col-4 {
    flex: 0 0 auto;
    width: 33.33333333%;
}
.col-6 {
    flex: 0 0 auto;
    width: 50%;
}

.input-card.h-70 {
    height: calc(70% - 0.5rem) !important;
}
.input-card.h-30 {
    height: calc(30% - 0.5rem) !important;
}

.btn-outline-custom {
    border-radius: 40px;
    padding: 6px 20px;
    font-weight: 600;
    font-size: 0.82rem;
    background: transparent;
    border: 1.5px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.25s;
    cursor: pointer;
    font-family: var(--font);
}
.btn-outline-custom:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-light);
    transform: translateY(-1px);
}
.border-0 {
    border: none!important;
}
hr {
    border-top: 1px solid;
    border-color: var(--border-color);
    margin: 16px 0;
    transition: border-color var(--transition);
}
.w-100 {
    width: 100%;
}
.p-2 {
    padding: 0.75rem !important;
}
.d-none {
    display: none !important;
}
::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}::file-selector-button{font:inherit;-webkit-appearance:button}output{display:inline-block}
.form-control[type=file]{overflow:hidden}
.form-control[type=file]:not(:disabled):not([readonly]){cursor:pointer}
.form-control:focus{color:var(--bs-body-color);background-color:var(--bs-body-bg);border-color:#86b7fe;outline:0;box-shadow:0 0 0 .25rem rgba(13,110,253,.25)}
.form-control::-webkit-date-and-time-value{min-width:85px;height:1.5em;margin:0}.form-control::-webkit-datetime-edit{display:block;padding:0}
.form-control::-moz-placeholder{color:var(--bs-secondary-color);opacity:1}.form-control::placeholder{color:var(--bs-secondary-color);opacity:1}
.form-control:disabled{background-color:var(--bs-secondary-bg);opacity:1}.form-control::-webkit-file-upload-button{padding:.375rem .75rem;margin:-.375rem -.75rem;-webkit-margin-end:.75rem;margin-inline-end:.75rem;color:var(--bs-body-color);background-color:var(--bs-tertiary-bg);pointer-events:none;border-color:inherit;border-style:solid;border-width:0;border-inline-end-width:var(--bs-border-width);border-radius:0;-webkit-transition:color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;transition:color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out}.form-control::file-selector-button{padding:.375rem .75rem;margin:-.375rem -.75rem;-webkit-margin-end:.75rem;margin-inline-end:.75rem;color:var(--bs-body-color);background-color:var(--bs-tertiary-bg);pointer-events:none;border-color:inherit;border-style:solid;border-width:0;border-inline-end-width:var(--bs-border-width);border-radius:0;transition:color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out}@media (prefers-reduced-motion:reduce){.form-control::-webkit-file-upload-button{-webkit-transition:none;transition:none}.form-control::file-selector-button{transition:none}}.form-control:hover:not(:disabled):not([readonly])::-webkit-file-upload-button{background-color:var(--bs-secondary-bg)}.form-control:hover:not(:disabled):not([readonly])::file-selector-button{background-color:var(--bs-secondary-bg)}.form-control-plaintext{display:block;width:100%;padding:.375rem 0;margin-bottom:0;line-height:1.5;color:var(--bs-body-color);background-color:transparent;border:solid transparent;border-width:var(--bs-border-width) 0}.form-control-plaintext:focus{outline:0}.form-control-plaintext.form-control-lg,.form-control-plaintext.form-control-sm{padding-right:0;padding-left:0}.form-control-sm{min-height:calc(1.5em + .5rem + calc(var(--bs-border-width) * 2));padding:.25rem .5rem;font-size:.875rem;border-radius:var(--bs-border-radius-sm)}.form-control-sm::-webkit-file-upload-button{padding:.25rem .5rem;margin:-.25rem -.5rem;-webkit-margin-end:.5rem;margin-inline-end:.5rem}.form-control-sm::file-selector-button{padding:.25rem .5rem;margin:-.25rem -.5rem;-webkit-margin-end:.5rem;margin-inline-end:.5rem}.form-control-lg{min-height:calc(1.5em + 1rem + calc(var(--bs-border-width) * 2));padding:.5rem 1rem;font-size:1.25rem;border-radius:var(--bs-border-radius-lg)}.form-control-lg::-webkit-file-upload-button{padding:.5rem 1rem;margin:-.5rem -1rem;-webkit-margin-end:1rem;margin-inline-end:1rem}.form-control-lg::file-selector-button{padding:.5rem 1rem;margin:-.5rem -1rem;-webkit-margin-end:1rem;margin-inline-end:1rem}
/* ============================================================
   Sidebar (Left)
   ============================================================ */
.sidebar {
    width: 250px;
    min-width: 250px;
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    left: 0;
    transition: background var(--transition), border-color var(--transition),
        transform var(--transition), box-shadow var(--transition);
    z-index: 100;
    overflow-y: auto;
    overflow-x: hidden;
    box-shadow: var(--shadow-sidebar);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 24px 24px 20px 24px;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition);
    flex-shrink: 0;
}
.sidebar-logo .logo-icon {
    font-size: 26px;
    line-height: 1;
}
.sidebar-logo .logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--logo-color);
    letter-spacing: -0.3px;
    transition: color var(--transition);
}
.sidebar-logo .logo-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    margin-left: 2px;
    transition: background var(--transition);
}

.sidebar-menu {
    padding: 16px 12px 24px 12px;
    flex: 1;
    overflow-y: auto;
}

.menu-group {
    margin-bottom: 20px;
}
.menu-group:last-child {
    margin-bottom: 0;
}

.menu-heading {
    display: flex;
    align-items: center;
    padding: 8px 14px 6px 14px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    cursor: default;
    user-select: none;
    transition: color var(--transition);
    letter-spacing: 0.3px;
}

.menu-item {
    padding: 0 14px 0 28px;
}
.menu-item a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: background var(--transition), color var(--transition),
        transform 0.15s ease;
    position: relative;
}
.menu-item a::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 50%;
    transform: translateY(-50%) scaleX(0);
    width: 3px;
    height: 20px;
    border-radius: var(--radius-sm);
    background: var(--accent);
    transition: transform var(--transition);
}
.menu-item a:hover {
    background: var(--accent-light);
    color: var(--text-primary);
    transform: translateX(4px);
}
.menu-item a:hover::before {
    transform: translateY(-50%) scaleX(1);
}
.menu-item a.active {
    background: var(--menu-active-bg);
    color: var(--menu-active-color);
    font-weight: 600;
}
.menu-item a.active::before {
    transform: translateY(-50%) scaleX(1);
}

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    flex-shrink: 0;
    transition: border-color var(--transition), color var(--transition);
}

/* ============================================================
   Main Content (Right)
   ============================================================ */
.main-content {
    flex: 1;
    min-width: 0;
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    background: var(--bg-body);
    transition: background var(--transition);
    position: relative;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 17px 32px;
    background: var(--bg-topbar);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
    transition: background var(--transition), border-color var(--transition),
        box-shadow var(--transition);
    box-shadow: var(--shadow-topbar);
    flex-shrink: 0;
    min-height: 72px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}
.hamburger:hover {
    background: var(--accent-light);
}
.hamburger span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: background var(--transition), transform 0.25s ease;
}
.hamburger.open span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
    opacity: 0;
}
.hamburger.open span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}
.topbar-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition);
}
.topbar-title .title-sub {
    font-weight: 400;
    color: var(--text-muted);
    font-size: 14px;
    margin-left: 6px;
    transition: color var(--transition);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ── Theme toggle with smooth animation ── */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 40px;
    padding: 4px 6px;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition),
        box-shadow var(--transition);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
    position: relative;
    user-select: none;
}
.theme-toggle:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}
.theme-toggle .toggle-track {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 2px;
    border-radius: 30px;
    position: relative;
    width: 60px;
    height: 30px;
    background: var(--border-color);
    transition: background var(--transition);
}
.theme-toggle .toggle-thumb {
    position: absolute;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    transition: transform var(--transition), background var(--transition);
    left: 4px;
    top: 50%;
    transform: translateY(-50%) translateX(0);
}
[data-theme="dark"] .theme-toggle .toggle-thumb {
    transform: translateY(-50%) translateX(30px);
    background: #e8efe9;
}
.theme-toggle .toggle-icon {
    font-size: 14px;
    line-height: 1;
    padding: 0 4px;
    z-index: 1;
    opacity: 0.7;
    transition: opacity var(--transition);
    pointer-events: none;
}
.theme-toggle .toggle-icon.active {
    opacity: 1;
}
.theme-toggle .toggle-icon:first-child {
    margin-right: auto;
}
.theme-toggle .toggle-icon:last-child {
    margin-left: auto;
}
.theme-toggle-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    padding-right: 4px;
    transition: color var(--transition);
}

/* ============================================================
   Content Area — Three Sections: Colors · Icons · Tools
   ============================================================ */
.content-area {
    padding: 28px 32px 40px 32px;
    flex: 1;
    transition: padding var(--transition);
}

.section-block {
    margin-bottom: 40px;
}
.section-block:last-child {
    margin-bottom: 0;
}

.section-head {
    margin-bottom: 18px;
}
.section-head h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    transition: color var(--transition);
}
.section-head p {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 2px;
    transition: color var(--transition);
}

/* ---- Shared card grid ---- */
.grid-colors,
.grid-icons,
.grid-tools {
    display: grid;
    gap: 18px;
}
.grid-colors {
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
}
.grid-icons {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}
.grid-tools {
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
}

/* ---- Base card style (all cards are <a> links) ---- */
.card-link {
    display: block;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 16px 16px 16px 16px;
    box-shadow: var(--shadow-card);
    transition: background var(--transition), border-color var(--transition),
        box-shadow var(--transition), transform 0.2s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}
.card-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
    border-color: var(--accent-soft);
}

/* ---- Color Card ---- */
.color-card .color-swatch-strip {
    display: flex;
    gap: 3px;
    margin-bottom: 12px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    height: 48px;
}
.color-card .color-swatch-strip span {
    flex: 1;
    display: block;
}
.color-card .color-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-card-title);
    transition: color var(--transition);
}
.color-card .color-sub {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
    transition: color var(--transition);
}

/* ---- Icon Card (with image preview) ---- */
.icon-card .icon-preview-img {
    width: 100%;
    height: 130px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    display: block;
    background: var(--bg-card-hover);
    transition: background var(--transition);
    margin-bottom: 12px;
}
.icon-card .icon-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-card-title);
    transition: color var(--transition);
}
.icon-card .icon-sub {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
    transition: color var(--transition);
}

/* ---- Tool Card ---- */
.tool-card .tool-top {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}
.tool-card .tool-info {
    flex: 1;
    min-width: 0;
}
.tool-card .tool-info .tool-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-card-title);
    transition: color var(--transition);
}
.tool-card .tool-info .tool-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 10px;
    line-height: 1.4;
    transition: color var(--transition);
}
.tool-card .tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    transition: border-color var(--transition);
}
.tool-card .tool-tags .tag {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 30px;
    background: var(--accent-light);
    color: var(--accent);
    transition: background var(--transition), color var(--transition);
}
.tool-card .tool-tags .tag.free {
    background: var(--accent-light);
    color: var(--accent);
}
.tool-card .tool-tags .tag.beta {
    background: var(--pink-light, #faf0f2);
    color: #c48a8a;
}
[data-theme="dark"] .tool-card .tool-tags .tag.beta {
    background: #3d2a2a;
    color: #d4a0a0;
}

/* ── Toast Notification ── */
.toast-container {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    pointer-events: none;
}
.toast {
    background: var(--toast-bg);
    color: var(--toast-text);
    padding: 10px 28px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
    opacity: 0;
    transform: translateY(16px) scale(0.96);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    font-family: var(--font);
}
.toast.show {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* ============================================================
   Page
   ============================================================ */
.tool-inner-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.seo-inner {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}
.seo-inner h3 {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    transition: color var(--transition);
}
.seo-inner p,
.seo-inner li {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.92rem;
    transition: color var(--transition);
}
.seo-inner ul {
    padding-left: 20px;
}
.seo-inner ul li {
    margin-bottom: 4px;
}
.seo-inner code {
    background: var(--bg-card-hover);
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    color: var(--accent);
    transition: background var(--transition), color var(--transition);
    font-family: 'JetBrains Mono', monospace;
}

.faq-inner .accordion-item {
    border: none;
    margin-bottom: 8px;
    overflow: hidden;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: background var(--transition), border-color var(--transition);
}
.faq-inner .accordion-button {
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-card);
    padding: 14px 20px;
    border: none;
    box-shadow: none !important;
    font-size: 0.95rem;
    transition: background var(--transition), color var(--transition);
    font-family: var(--font);
}
.faq-inner .accordion-button:not(.collapsed) {
    background: var(--accent-light);
    color: var(--accent);
}
.faq-inner .accordion-button:focus {
    box-shadow: none;
}
.faq-inner .accordion-button::after {
    background-size: 1rem;
}
.faq-inner .accordion-body {
    padding: 8px 20px 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--border-color);
    font-size: 0.92rem;
    transition: color var(--transition), border-color var(--transition);
}

.related-inner {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}
.related-inner h3 {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 14px;
    transition: color var(--transition);
}
.related-inner .grid-related {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 12px;
}
.related-inner .tool-card-mini {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px 14px;
    background: var(--bg-card);
    transition: background var(--transition), border-color var(--transition),
        box-shadow var(--transition), transform 0.2s ease;
    color: var(--text-primary);
    text-decoration: none;
    display: block;
    box-shadow: var(--shadow-card);
}
.related-inner .tool-card-mini:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.04);
    border-color: var(--accent-soft);
}
.related-inner .tool-card-mini .icon-wrap {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 6px;
}
.related-inner .tool-card-mini h5 {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-card-title);
    margin-bottom: 12px;
    transition: color var(--transition);
}
.related-inner .tool-card-mini p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0;
    transition: color var(--transition);
}

/* ============================================================
   Guides List - Extra Styles
   ============================================================ */
.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 8px;
}
.guide-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 24px 22px 22px;
    box-shadow: var(--shadow-card);
    transition: background var(--transition), border-color var(--transition),
        box-shadow var(--transition), transform 0.2s ease;
    text-decoration: none;
    color: var(--text-primary);
    display: block;
}
.guide-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
    border-color: var(--accent-soft);
}
.guide-card .tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 2px 12px;
    border-radius: 30px;
    background: var(--accent-light);
    color: var(--accent);
    margin-bottom: 12px;
}
.guide-card h3 {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-card-title);
    margin-bottom: 6px;
    transition: color var(--transition);
}
.guide-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}
.guide-card .meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
}
.guide-card .meta .read-time {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ============================================================
   Guide Detail - Extra Styles
   ============================================================ */
.article-header {
    margin-bottom: 28px;
}
.article-header .tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 3px 14px;
    border-radius: 30px;
    background: var(--accent-light);
    color: var(--accent);
    margin-bottom: 10px;
}
.article-header h1 {
    font-weight: 800;
    font-size: 2rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 10px;
}
.article-header .meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}
.article-header .meta .divider {
    color: var(--border-color);
}

.article-body {
    max-width: 820px;
}
.article-body h2 {
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-top: 32px;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.article-body h3 {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-top: 24px;
    margin-bottom: 6px;
}
.article-body p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}
.article-body ul,
.article-body ol {
    padding-left: 22px;
    margin-bottom: 16px;
}
.article-body li {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 4px;
}
.article-body code {
    background: var(--bg-card-hover);
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
}
.article-body .tip-box {
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin: 20px 0;
}
.article-body .tip-box p {
    margin-bottom: 0;
    font-size: 0.92rem;
}

.article-footer {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}
.article-footer .related-tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    transition: border-color var(--transition);
}
.article-footer .related-tool-card:hover {
    border-color: var(--accent-soft);
}
.article-footer .related-tool-card .info {
    display: flex;
    align-items: center;
    gap: 12px;
}
.article-footer .related-tool-card .info .emoji {
    font-size: 1.8rem;
}
.article-footer .related-tool-card .info h4 {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}
.article-footer .related-tool-card .info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}
.article-footer .related-tool-card .btn-try {
    border-radius: 40px;
    padding: 6px 20px;
    font-weight: 600;
    font-size: 0.82rem;
    background: var(--accent);
    border: 1px solid var(--accent);
    color: #fff;
    transition: all 0.25s;
    text-decoration: none;
    white-space: nowrap;
}
.article-footer .related-tool-card .btn-try:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.toc {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 18px 22px;
    margin-bottom: 28px;
}
.toc h4 {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.toc ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.toc ul li {
    padding: 3px 0;
}
.toc ul li a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}
.toc ul li a:hover {
    color: var(--accent);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
        min-width: 220px;
    }
    .content-area {
        padding: 20px 24px 32px 24px;
    }
    .topbar {
        padding: 14px 24px;
    }
}

@media (max-width: 992px) {
    .tool-inner-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        min-width: 280px;
        height: 100vh;
        transform: translateX(-100%);
        box-shadow: 0 0 40px rgba(0, 0, 0, 0.15);
        border-right: none;
        z-index: 200;
        border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    }
    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.25);
        z-index: 150;
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        transition: opacity 0.3s ease;
    }
    .sidebar-backdrop.active {
        display: block;
    }

    .hamburger {
        display: flex;
    }

    .topbar {
        padding: 12px 18px;
        min-height: 64px;
    }
    .topbar-title {
        font-size: 17px;
    }
    .topbar-title .title-sub {
        font-size: 12px;
    }

    .content-area {
        padding: 16px 18px 32px 18px;
    }

    .grid-colors,
    .grid-icons {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    .grid-tools {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }

    .icon-card .icon-preview-img {
        height: 110px;
    }

    .theme-toggle-label {
        display: none;
    }
    .theme-toggle .toggle-track {
        width: 48px;
        height: 26px;
    }
    .theme-toggle .toggle-thumb {
        width: 20px;
        height: 20px;
    }
    [data-theme="dark"] .theme-toggle .toggle-thumb {
        transform: translateY(-50%) translateX(22px);
    }
    .theme-toggle .toggle-icon {
        font-size: 12px;
    }
    .input-card {
        padding: 18px 16px 20px;
    }
    .preview-box {
        height: 100px;
    }
    .input-card .d-flex.gap-3 {
        flex-wrap: wrap;
    }
    .input-card .color-hex-input {
        flex: 1 1 100%;
    }
    .related-inner .grid-related {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
    .scroll-list {
        max-height: 280px;
    }
}

@media (max-width: 480px) {
    .grid-colors,
    .grid-icons {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        gap: 12px;
    }
    .grid-tools {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .icon-card .icon-preview-img {
        height: 90px;
    }
    .topbar-title {
        font-size: 15px;
    }
    .content-area {
        padding: 12px 14px 24px 14px;
    }
    .sidebar {
        width: 260px;
        min-width: 260px;
    }
    .related-inner .grid-related {
        grid-template-columns: 1fr 1fr;
    }
    .input-card .form-color {
        width: 38px;
        height: 38px;
    }
    .code-block {
        font-size: 0.82rem;
        padding: 8px 12px;
    }
}

body.no-scroll {
    overflow: hidden;
}

/* ============================================================
   No entrance animations
   ============================================================ */