/**
 * Autocompleter (autocompleter.app) - Stylesheet
 *
 * Designed to match TonyHerman.com color scheme:
 * - Gold: #b47b3d
 * - Black: #000
 * - White: #fff
 * - Medium gray: #4A5568
 * - Light gray: #EDF2F7 or #F7FAFC
 * - Yellow highlights: #FEFFE5
 * - Blue callouts: #EFF8FF
 *
 * High-contrast, accessible, mobile-first, zero external frameworks/fonts.
 */

:root {
    /* TonyHerman.com Brand Color Palette */
    --color-gold: #b47b3d;
    --color-gold-hover: #96632b;
    --color-gold-dark: #7d5020;
    --color-gold-light: #fdfaf6;
    --color-gold-border: #d4a36a;

    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-medium: #4A5568;
    --color-gray-light: #F7FAFC;
    --color-gray-alt: #EDF2F7;
    --color-gray-border: #CBD5E0;
    --color-gray-border-subtle: #E2E8F0;

    --color-highlight-yellow: #FEFFE5;
    --color-callout-blue: #EFF8FF;
    --color-callout-blue-border: #BEE3F8;
    --color-callout-blue-text: #2B6CB0;

    /* Semantic Theme Mappings */
    --color-bg: var(--color-gray-light);
    --color-surface: var(--color-white);
    --color-surface-alt: var(--color-gray-alt);
    --color-border: var(--color-gray-border);
    --color-border-subtle: var(--color-gray-border-subtle);

    --color-text-main: var(--color-black);
    --color-text-muted: var(--color-gray-medium);
    --color-text-light: #718096;

    --color-primary: var(--color-gold);
    --color-primary-hover: var(--color-gold-hover);
    --color-primary-bg: var(--color-highlight-yellow);

    --color-success: #276749;
    --color-success-bg: #f0fff4;
    --color-warning: var(--color-gold);
    --color-warning-bg: var(--color-highlight-yellow);
    --color-error: #9b2c2c;
    --color-error-bg: #fff5f5;
    --color-focus: var(--color-gold);

    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);

    --transition: 0.15s ease-in-out;
}

/* Box sizing and reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Accessible Skip Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    background: var(--color-black);
    color: var(--color-white);
    padding: 0.75rem 1.25rem;
    font-weight: 700;
    z-index: 99999;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: top var(--transition);
}

.skip-link:focus {
    top: 1rem;
}

/* Accessible focus outlines */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

/* Layout Container */
.container {
    width: 100%;
    max-width: 1120px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
}

/* Header */
.site-header {
    background-color: var(--color-surface);
    border-bottom: 2px solid var(--color-gray-alt);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 1.5rem;
}

.brand-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--color-black);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.brand-icon {
    color: var(--color-gold);
    flex-shrink: 0;
}

.brand-highlight {
    color: var(--color-gold);
}

.site-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-link {
    display: inline-block;
    padding: 0.5rem 0.9rem;
    color: var(--color-text-muted);
    font-weight: 700;
    font-size: 0.95rem;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-link:hover {
    color: var(--color-black);
    background-color: var(--color-surface-alt);
}

.nav-link.active {
    color: var(--color-gold-dark);
    background-color: var(--color-highlight-yellow);
    border: 1px solid var(--color-gold-border);
}

.header-search-wrap {
    flex-grow: 1;
    max-width: 320px;
}

.header-search-form {
    position: relative;
    display: flex;
    align-items: center;
}

.header-search-input {
    width: 100%;
    padding: 0.45rem 2.2rem 0.45rem 0.85rem;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface-alt);
    color: var(--color-black);
}

.header-search-input:focus {
    background: var(--color-white);
    border-color: var(--color-gold);
}

.header-search-btn {
    position: absolute;
    right: 6px;
    background: transparent;
    border: none;
    color: var(--color-gold);
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 4px;
}

.header-search-btn:hover {
    color: var(--color-gold-hover);
}

/* Main Content Area */
.site-main {
    flex-grow: 1;
    padding-top: 2.25rem;
    padding-bottom: 3.5rem;
}

/* Home Page */
.home-hero {
    text-align: center;
    max-width: 820px;
    margin: 1rem auto 2.5rem;
}

.hero-badge {
    display: inline-block;
    background-color: var(--color-highlight-yellow);
    color: var(--color-gold-dark);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.35rem 0.95rem;
    border-radius: 9999px;
    margin-bottom: 1.25rem;
    border: 1px solid var(--color-gold-border);
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--color-black);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.search-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    margin-bottom: 2.5rem;
    text-align: left;
}

.main-search-form {
    width: 100%;
}

.search-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 640px) {
    .search-input-group {
        flex-direction: row;
        align-items: center;
        border: 2px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: 0.35rem;
        background: var(--color-white);
        transition: border-color var(--transition);
    }

    .search-input-group:focus-within {
        border-color: var(--color-gold);
        box-shadow: 0 0 0 3px rgba(180, 123, 61, 0.2);
    }
}

.search-input-prefix {
    display: none;
}

@media (min-width: 640px) {
    .search-input-prefix {
        display: flex;
        align-items: center;
        padding-left: 0.75rem;
        color: var(--color-gold);
    }
}

.main-search-input {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: 1.1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-black);
    background: var(--color-white);
}

@media (min-width: 640px) {
    .main-search-input {
        border: none;
        padding: 0.65rem 0.75rem;
        border-radius: 0;
    }

    .main-search-input:focus-visible {
        outline: none;
    }
}

.main-search-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background-color: var(--color-gold);
    color: var(--color-white);
    font-size: 1.05rem;
    font-weight: 700;
    padding: 0.85rem 1.75rem;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition);
    flex-shrink: 0;
}

.main-search-btn:hover {
    background-color: var(--color-gold-hover);
}

.example-searches {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

@media (min-width: 640px) {
    .example-searches {
        flex-direction: row;
        align-items: center;
    }
}

.example-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

.example-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.example-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: 1px solid var(--color-border-subtle);
    transition: all var(--transition);
}

.example-tag:hover {
    background: var(--color-highlight-yellow);
    color: var(--color-gold-dark);
    border-color: var(--color-gold-border);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.35rem 1.2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-gold);
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 0.35rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    font-weight: 600;
}

.stat-card-link {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-callout-blue);
    border: 1px solid var(--color-callout-blue-border);
}

.stat-link-content {
    text-decoration: none;
    color: inherit;
    display: block;
    width: 100%;
}

.stat-label-link {
    font-size: 0.85rem;
    color: var(--color-callout-blue-text);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-action-link {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-gold);
}

/* Disclaimer Cards: Blue Callouts (#EFF8FF) */
.home-disclaimer-card {
    background: var(--color-callout-blue);
    border: 1px solid var(--color-callout-blue-border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    text-align: left;
    font-size: 0.925rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.disclaimer-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-callout-blue-text);
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
    font-weight: 700;
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
    margin-bottom: 1.25rem;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.breadcrumbs li + li::before {
    content: "/";
    color: var(--color-text-light);
    margin-right: 0.5rem;
}

.breadcrumbs a {
    color: var(--color-gold);
    text-decoration: none;
    font-weight: 600;
}

.breadcrumbs a:hover {
    color: var(--color-gold-hover);
    text-decoration: underline;
}

.breadcrumbs [aria-current="page"] {
    color: var(--color-text-muted);
    font-weight: 600;
}

/* Keyword View Header */
.keyword-header-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.keyword-header-top {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.keyword-title {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-black);
    margin-bottom: 1.25rem;
    word-break: break-word;
}

.keyword-meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 0.75rem 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border-subtle);
}

.meta-item {
    display: flex;
    flex-direction: column;
}

.meta-label {
    font-size: 0.775rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.2rem;
}

.meta-value {
    font-size: 0.95rem;
    color: var(--color-black);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    font-size: 0.775rem;
    font-weight: 700;
    padding: 0.25rem 0.65rem;
    border-radius: 9999px;
    letter-spacing: 0.02em;
}

.badge-primary {
    background: var(--color-highlight-yellow);
    color: var(--color-gold-dark);
    border: 1px solid var(--color-gold-border);
}

.badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid #bbf7d0;
}

.badge-neutral {
    background: var(--color-surface-alt);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

/* Ad Containers */
.ad-container {
    margin: 1.5rem 0;
    text-align: center;
}

.ad-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.35rem;
}

.ad-placeholder-box {
    background: var(--color-gray-alt);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 90px;
}

.ad-placeholder-text {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

/* Results Toolbar */
.results-toolbar {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin: 1.5rem 0 1rem;
}

@media (min-width: 640px) {
    .results-toolbar {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.results-heading {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--color-black);
}

.toolbar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.6rem 1.15rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--color-gold);
    color: var(--color-white);
    border-color: var(--color-gold);
}

.btn-primary:hover {
    background: var(--color-gold-hover);
    border-color: var(--color-gold-hover);
    color: var(--color-white);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-alt);
    border-color: var(--color-text-muted);
    color: var(--color-black);
}

/* Action Button: "Results" Button in History and Actions */
.btn-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gold);
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.4rem 0.95rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: 1px solid var(--color-gold);
    transition: all var(--transition);
    white-space: nowrap;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn-action:hover {
    background: var(--color-gold-hover);
    border-color: var(--color-gold-hover);
    color: var(--color-white);
    text-decoration: none;
    box-shadow: 0 2px 5px rgba(180, 123, 61, 0.3);
}

.action-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    color: var(--color-gold);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    border: 1px solid var(--color-gold);
    transition: all var(--transition);
    white-space: nowrap;
}

.action-link:hover {
    background: var(--color-gold);
    color: var(--color-white);
    text-decoration: none;
}

/* Data Tables */
.table-responsive-wrapper {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow-x: auto;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    padding: 0.9rem 1.1rem;
    border-bottom: 1px solid var(--color-border-subtle);
}

.data-table thead th {
    background-color: var(--color-surface-alt);
    color: var(--color-black);
    font-weight: 800;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    position: sticky;
    top: 0;
    overflow: visible;
}

.data-table tbody tr {
    transition: background-color var(--transition);
}

.data-table tbody tr:hover {
    /* Yellow highlight on table row hover */
    background-color: var(--color-highlight-yellow);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.col-num {
    width: 50px;
    text-align: center;
}

.col-keyword {
    font-weight: 500;
}

.keyword-cell-text {
    font-weight: 700;
    color: var(--color-black);
}

.keyword-title-link,
.keyword-cell-link {
    color: var(--color-black);
    text-decoration: none;
    font-weight: 700;
    transition: color var(--transition);
}

.keyword-title-link:hover,
.keyword-cell-link:hover {
    color: var(--color-gold);
    text-decoration: underline;
}

.col-relevance {
    width: 230px;
    overflow: visible;
}

.relevance-score {
    display: inline-block;
    background: var(--color-highlight-yellow);
    color: var(--color-black);
    font-weight: 800;
    font-size: 0.9rem;
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-gold-border);
}

.relevance-none {
    display: inline-block;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

.col-actions {
    width: 130px;
    text-align: right;
}

.cell-muted {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ==========================================================================
   Tooltips: Question Mark next to Google Suggestion Relevance
   Pure CSS interactive tooltip popping up on mouseover and keyboard focus.
   ========================================================================== */
.info-tooltip {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-gold);
    color: var(--color-white);
    font-size: 11px;
    font-weight: 800;
    cursor: help;
    margin-left: 0.4rem;
    vertical-align: middle;
    line-height: 1;
    text-transform: none;
    letter-spacing: normal;
    transition: background var(--transition), transform var(--transition);
}

.info-tooltip:hover,
.info-tooltip:focus {
    background: var(--color-black);
    color: var(--color-white);
    outline: none;
}

/* Tooltip Speech Bubble */
.info-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: var(--color-black);
    color: var(--color-white);
    font-size: 0.775rem;
    font-weight: 500;
    line-height: 1.45;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    width: 260px;
    max-width: 80vw;
    white-space: normal;
    text-align: left;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 99999;
}

/* Tooltip Arrow Beak pointing down to the ? */
.info-tooltip::before {
    content: "";
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    border-width: 6px 6px 0 6px;
    border-style: solid;
    border-color: var(--color-black) transparent transparent transparent;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 100000;
}

/* Reveal Tooltip on Mouse Hover or Keyboard Focus */
.info-tooltip:hover::after,
.info-tooltip:focus::after,
.info-tooltip:hover::before,
.info-tooltip:focus::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Empty State Card */
.empty-state-card {
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--color-text-muted);
}

.empty-icon {
    color: var(--color-gold);
    margin-bottom: 1rem;
}

.empty-state-card h3 {
    font-size: 1.25rem;
    color: var(--color-black);
    margin-bottom: 0.5rem;
}

.empty-state-card p {
    font-size: 0.95rem;
    max-width: 480px;
    margin: 0 auto 1.5rem;
}

/* Keyword Footer Quick Search */
.keyword-footer-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.keyword-footer-search h3 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--color-black);
}

.inline-search-form {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    max-width: 500px;
}

@media (min-width: 640px) {
    .inline-search-form {
        flex-direction: row;
    }
}

.inline-search-input {
    flex-grow: 1;
    padding: 0.6rem 0.9rem;
    font-size: 0.95rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    color: var(--color-black);
}

.inline-search-input:focus {
    outline: none;
    border-color: var(--color-gold);
    box-shadow: 0 0 0 2px rgba(180, 123, 61, 0.2);
}

.keyword-footer-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border-subtle);
}

.link-nav {
    color: var(--color-gold);
    text-decoration: none;
    font-weight: 700;
}

.link-nav:hover {
    color: var(--color-gold-hover);
    text-decoration: underline;
}

.link-separator {
    color: var(--color-text-muted);
}

/* History Page */
.history-hero {
    margin-bottom: 2rem;
}

.history-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    color: var(--color-black);
}

.history-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

/* A-Z Filter Buttons */
.az-filter-wrapper {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
}

.az-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.6rem;
}

.az-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.az-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 0.4rem;
    font-size: 0.85rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--color-black);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.az-btn:hover:not(.az-disabled) {
    background: var(--color-highlight-yellow);
    color: var(--color-gold-dark);
    border-color: var(--color-gold-border);
}

.az-btn.active {
    background: var(--color-gold);
    color: var(--color-white);
    border-color: var(--color-gold);
}

.az-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* Pagination */
.pagination-nav {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    margin: 2rem 0;
}

@media (min-width: 640px) {
    .pagination-nav {
        flex-direction: row;
        justify-content: space-between;
    }
}

.pagination-summary {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 600;
}

.pagination-list {
    display: flex;
    list-style: none;
    gap: 0.35rem;
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-black);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition);
}

.pagination-link:hover {
    background: var(--color-surface-alt);
    border-color: var(--color-text-muted);
}

.pagination-link.active {
    background: var(--color-gold);
    color: var(--color-white);
    border-color: var(--color-gold);
}

.pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 30px;
    color: var(--color-text-muted);
}

/* Alerts */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    font-size: 0.925rem;
    line-height: 1.5;
}

.alert-error {
    background-color: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid #fecaca;
}

.alert-warning {
    background-color: var(--color-highlight-yellow);
    color: var(--color-gold-dark);
    border: 1px solid var(--color-gold-border);
}

.alert-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

/* Toast Notification (Copy to clipboard) */
.toast-notice {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--color-black);
    color: var(--color-white);
    padding: 0.85rem 1.35rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 0.9rem;
    font-weight: 700;
    z-index: 100000;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    animation: toast-fade-in 0.2s ease-out;
}

@keyframes toast-fade-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Error Page */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
}

.error-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    max-width: 520px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-md);
}

.error-badge {
    display: inline-block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-gold);
    margin-bottom: 0.5rem;
}

.error-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--color-black);
}

.error-description {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.error-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 480px) {
    .error-actions {
        flex-direction: row;
        justify-content: center;
    }
}

/* Footer: Clean White & Blue Callout */
.site-footer {
    background: var(--color-surface);
    border-top: 2px solid var(--color-gray-alt);
    padding: 2.5rem 0 1.75rem;
    margin-top: auto;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-disclaimer {
    background: var(--color-callout-blue);
    border: 1px solid var(--color-callout-blue-border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    margin-bottom: 1.75rem;
    line-height: 1.6;
    color: var(--color-text-muted);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    text-align: center;
}

@media (min-width: 640px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer-links {
    display: flex;
    list-style: none;
    gap: 1.25rem;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: 600;
}

.footer-links a:hover {
    color: var(--color-gold);
    text-decoration: underline;
}

.footer-copy {
    color: var(--color-text-muted);
    font-size: 0.8rem;
}

/* Utility: visually hidden for screen readers */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ==============================================================================
 * About Page Styles (Long-tail Keyword Discovery & Deep Drill-Down)
 * ============================================================================== */
.about-container {
    max-width: 900px;
    margin: 0 auto;
}

.about-hero {
    text-align: center;
    margin-bottom: 2.5rem;
}

.about-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--color-black);
    letter-spacing: -0.025em;
    line-height: 1.25;
    margin: 0.75rem 0 1rem;
}

.about-lead {
    font-size: 1.15rem;
    color: var(--color-gray-medium);
    line-height: 1.6;
    max-width: 780px;
    margin: 0 auto;
}

.about-grid {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 3rem;
}

.about-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem 2.25rem;
    box-shadow: var(--shadow-sm);
}

.about-card p {
    color: var(--color-gray-medium);
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.about-card p:last-child {
    margin-bottom: 0;
}

.card-icon-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.card-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--color-highlight-yellow);
    border: 1px solid var(--color-gold-border);
    color: var(--color-gold-dark);
    flex-shrink: 0;
}

.card-icon-header h2 {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--color-black);
    letter-spacing: -0.02em;
}

.kw-pill {
    background: var(--color-highlight-yellow);
    color: var(--color-black);
    padding: 0.15rem 0.45rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-gold-border);
    font-weight: 600;
    font-size: 0.9em;
}

/* Comparison Cards: Seed vs Long-Tail */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    margin: 1.5rem 0;
}

@media (min-width: 640px) {
    .comparison-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.comparison-card {
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
}

.comparison-card.longtail-card {
    background: var(--color-highlight-yellow);
    border-color: var(--color-gold-border);
}

.comparison-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 800;
    color: var(--color-gray-medium);
    margin-bottom: 0.5rem;
}

.comparison-label-highlight {
    color: var(--color-gold-dark);
}

.comparison-query {
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-black);
    margin-bottom: 0.85rem;
    font-family: inherit;
}

.comparison-list {
    list-style: none;
    font-size: 0.875rem;
    color: var(--color-gray-medium);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.comparison-list li {
    position: relative;
    padding-left: 1.25rem;
    line-height: 1.45;
}

.comparison-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-weight: bold;
    font-size: 1.1rem;
}

/* Workflow Step Cards (Drill Down) */
.workflow-steps {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.25rem;
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    background: var(--color-surface-alt);
    transition: all var(--transition);
}

.step-item:hover {
    border-color: var(--color-gold);
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.step-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    background: var(--color-gold);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    flex-shrink: 0;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 0.35rem;
}

.step-content p {
    font-size: 0.925rem;
    color: var(--color-gray-medium);
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.step-example {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.step-link {
    color: var(--color-gold);
    font-weight: 700;
    text-decoration: none;
}

.step-link:hover {
    color: var(--color-gold-hover);
    text-decoration: underline;
}

/* Callouts in About */
.callout-blue {
    background: var(--color-callout-blue);
    border: 1px solid var(--color-callout-blue-border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    font-size: 0.925rem;
    color: var(--color-gray-medium);
    line-height: 1.55;
}

.callout-blue strong {
    color: var(--color-callout-blue-text);
}

.callout-yellow {
    background: var(--color-highlight-yellow);
    border: 1px solid var(--color-gold-border);
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    font-size: 0.925rem;
    color: var(--color-black);
    line-height: 1.55;
}

.badge-sample {
    display: inline-block;
    background: var(--color-highlight-yellow);
    border: 1px solid var(--color-gold-border);
    padding: 0.1rem 0.4rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.85em;
    color: var(--color-black);
}

/* Features checklist */
.features-checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

.features-checklist li {
    position: relative;
    padding-left: 1.75rem;
    font-size: 0.95rem;
    color: var(--color-gray-medium);
    line-height: 1.5;
}

.features-checklist li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-weight: 800;
    font-size: 1.1rem;
}

/* About CTA Section */
.about-cta-section {
    background: var(--color-callout-blue);
    border: 1px solid var(--color-callout-blue-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    margin-bottom: 2.5rem;
}

.about-cta-inner {
    max-width: 640px;
    margin: 0 auto;
}

.cta-heading {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--color-black);
    margin-bottom: 0.6rem;
}

.cta-sub {
    font-size: 1rem;
    color: var(--color-gray-medium);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.about-search-form {
    max-width: 600px;
    margin: 0 auto;
}