/* ===== CSS Custom Properties ===== */
:root {
    --color-primary: #1a365d;
    --color-primary-light: #2c5282;
    --color-accent: #c59a2f;
    --color-bg: #f7f8fa;
    --color-surface: #ffffff;
    --color-text: #2d3748;
    --color-text-muted: #718096;
    --color-border: #e2e8f0;
    --color-success: #38a169;

    --font-heading: 'Georgia', 'Times New Roman', serif;
    --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    --color-primary-dark: #0f2440;
    --color-accent-light: rgba(197, 154, 47, 0.15);

    --radius: 8px;
    --transition: 0.2s ease;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ===== Layout ===== */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

main {
    flex: 1;
    padding: 2.5rem 0 3rem;
}

/* ===== Welcome Text ===== */
.welcome-text {
    color: var(--color-text-muted);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* ===== Site Header ===== */
.site-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #ffffff;
    padding: 2rem 0;
    box-shadow: var(--shadow-md);
    position: relative;
}

.site-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), transparent);
}

.site-header .container {
    border-left: 3px solid var(--color-accent);
    padding-left: 1.25rem;
}

.site-header h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.site-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
    letter-spacing: 0.04em;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
}

.breadcrumb a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.breadcrumb span {
    margin: 0 0.35rem;
}

/* ===== Tools Grid (Landing Page) ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    display: block;
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: inherit;
    transition: transform var(--transition), box-shadow var(--transition);
}

.tool-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    border-color: var(--color-accent);
}

.tool-card-icon {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.tool-card-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.tool-card-description {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.tool-card-cta {
    display: inline-block;
    margin-top: 0.75rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary-light);
    transition: color var(--transition);
}

.tool-card:hover .tool-card-cta {
    color: var(--color-accent);
}

/* ===== Converter Section ===== */
.converter-section {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 2.25rem 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-accent);
    animation: slideUp 0.4s ease;
}

.input-group,
.output-group {
    margin-bottom: 1.25rem;
}

.input-group label,
.output-group label {
    display: block;
    font-family: var(--font-heading);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    font-size: 1rem;
    letter-spacing: 0.01em;
}

.input-group small {
    display: block;
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.input-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.35rem;
    gap: 0.5rem;
}

.char-count {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background: linear-gradient(to bottom, #ffffff, #fafbfc);
    resize: vertical;
    transition: border-color var(--transition), box-shadow var(--transition);
}

textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

textarea[readonly] {
    background-color: #f9fafb;
    cursor: default;
}

/* ===== Output Wrapper (textarea + copy button) ===== */
.output-wrapper {
    position: relative;
}

.output-wrapper textarea {
    padding-right: 5rem;
}

/* ===== Buttons ===== */
.button-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: background-color var(--transition), border-color var(--transition),
        color var(--transition), box-shadow var(--transition), transform var(--transition);
    font-family: var(--font-body);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

.btn:disabled,
.btn.is-loading {
    cursor: wait;
    opacity: 0.8;
}

.btn.is-loading {
    padding-left: 2.75rem;
    position: relative;
}

.btn.is-loading::before {
    content: "";
    position: absolute;
    left: 1rem;
    top: 50%;
    width: 1rem;
    height: 1rem;
    margin-top: -0.5rem;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #ffffff;
    animation: btn-spin 0.75s linear infinite;
}

@keyframes btn-spin {
    to { transform: rotate(360deg); }
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.25);
}

.btn-primary:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.35);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(26, 54, 93, 0.25);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background-color: rgba(26, 54, 93, 0.04);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-tertiary {
    background-color: transparent;
    color: var(--color-text-muted);
    border-color: transparent;
    padding: 0.6rem 1rem;
    font-weight: 500;
}

.btn-tertiary:hover {
    color: var(--color-primary);
    background-color: rgba(26, 54, 93, 0.04);
}

.btn-copy {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    padding: 0.35rem 0.85rem;
    font-size: 0.85rem;
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    border-radius: 6px;
}

.btn-copy:hover {
    background-color: var(--color-primary-light);
    transform: scale(1.03);
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.3);
}

/* ===== Keyboard Hint ===== */
.keyboard-hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.keyboard-hint kbd {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-bottom: 2px solid #c4c9d0;
    border-radius: 4px;
    box-shadow: 0 1px 0 1px rgba(0, 0, 0, 0.06);
    vertical-align: middle;
}

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background-color: var(--color-success);
    color: #ffffff;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

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

.toast--error {
    background-color: #c53030;
}

.toast-action {
    margin-left: 0.85rem;
    padding: 0.15rem 0.6rem;
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 4px;
    cursor: pointer;
    pointer-events: auto;
    transition: background-color var(--transition);
}

.toast-action:hover,
.toast-action:focus-visible {
    background-color: rgba(255, 255, 255, 0.3);
    outline: none;
}

/* ===== Rules Summary ===== */
.rules-summary {
    margin-top: 3rem;
    background: linear-gradient(to bottom, #ffffff 0%, #fafbfc 100%);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-primary);
    animation: slideUp 0.4s ease 0.1s both;
}

.rules-summary h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: 0;
}

/* --- Collapsible Rules Toggle --- */
.rules-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0;
    margin: 0;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    text-align: left;
    color: inherit;
}

.rules-toggle:hover h2 {
    color: var(--color-accent);
}

.rules-toggle:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 4px;
    border-radius: 4px;
}

.rules-toggle-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    position: relative;
    flex-shrink: 0;
    margin-left: 0.75rem;
    transition: transform 0.25s ease;
}

.rules-toggle-icon::before,
.rules-toggle-icon::after {
    content: '';
    position: absolute;
    background-color: var(--color-text-muted);
    border-radius: 1px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Horizontal bar */
.rules-toggle-icon::before {
    top: 50%;
    left: 2px;
    right: 2px;
    height: 2px;
    transform: translateY(-50%);
}

/* Vertical bar (collapses on expand) */
.rules-toggle-icon::after {
    left: 50%;
    top: 2px;
    bottom: 2px;
    width: 2px;
    transform: translateX(-50%);
}

.rules-toggle[aria-expanded="true"] .rules-toggle-icon::after {
    transform: translateX(-50%) scaleY(0);
    opacity: 0;
}

.rules-list {
    list-style: none;
    padding: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.25s ease, margin 0.25s ease;
    max-height: 5000px;
    opacity: 1;
    margin-top: 1rem;
}

.rules-list.collapsed {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
}

.rules-summary li {
    padding: 0.4rem 0;
    padding-left: 1.25rem;
    position: relative;
    font-size: 0.95rem;
    line-height: 1.6;
}

.rules-summary li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.85rem;
    width: 5px;
    height: 5px;
    background-color: var(--color-accent);
    border-radius: 1px;
}

.rules-summary em {
    color: var(--color-text-muted);
    font-style: normal;
    font-family: var(--font-mono);
    font-size: 0.88rem;
}

.rules-summary .note {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background-color: #fffbeb;
    border-left: 4px solid var(--color-accent);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.25s ease, margin 0.25s ease, padding 0.25s ease;
    max-height: 200px;
    box-shadow: var(--shadow-sm);
}

.rules-list.collapsed + .note {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    padding-top: 0;
    padding-bottom: 0;
}

/* ===== Compliance Checker Results ===== */

.results-container {
    margin-top: 1.5rem;
    animation: fadeSlideIn 0.3s ease;
}

@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.results-container.hidden {
    display: none;
}

/* --- Summary Bar --- */
.results-summary {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.results-summary .summary-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
}

.results-summary .summary-counts {
    display: flex;
    gap: 0.75rem;
}

.severity-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
}

.severity-badge--error {
    background-color: #fed7d7;
    color: #c53030;
}

.severity-badge--warning {
    background-color: #fefcbf;
    color: #b7791f;
}

.severity-badge--suggestion {
    background-color: #bee3f8;
    color: #2b6cb0;
}

/* --- Corrected Text Box --- */
.corrected-text-wrapper {
    margin-bottom: 1rem;
}

.corrected-text-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.corrected-text-label {
    display: block;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-primary);
}

.corrected-text-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-apply {
    padding: 0.3rem 0.75rem;
    font-size: 0.82rem;
    background-color: var(--color-success);
    color: #ffffff;
    border-color: var(--color-success);
    border-radius: 6px;
}

.btn-apply:hover {
    background-color: #2f855a;
    border-color: #2f855a;
}

.btn-copy-corrected {
    padding: 0.3rem 0.75rem;
    font-size: 0.82rem;
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    border-radius: 6px;
}

.btn-copy-corrected:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
}

.corrected-text-box {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.85rem 1rem;
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 20rem;
    overflow-y: auto;
    box-shadow: var(--shadow-sm);
}

.corrected-text-box .highlight {
    background-color: #fed7d7;
    border-radius: 2px;
    padding: 0.1rem 0.15rem;
    cursor: help;
}

.corrected-text-box .highlight--warning {
    background-color: #fefcbf;
}

.corrected-text-box .highlight--suggestion {
    background-color: #bee3f8;
}

.corrected-text-box .highlight--focus {
    animation: highlight-pulse 1.2s ease-out;
    box-shadow: 0 0 0 3px var(--color-accent);
    border-radius: 3px;
}

@keyframes highlight-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(197, 154, 47, 0.8); }
    30%  { box-shadow: 0 0 0 6px rgba(197, 154, 47, 0.6); }
    100% { box-shadow: 0 0 0 3px rgba(197, 154, 47, 0.0); }
}

.corrected-text-box em {
    font-style: italic;
}

/* --- Correction Hover Tooltip --- */
.correction-tooltip {
    position: fixed;
    z-index: 1000;
    max-width: 320px;
    padding: 0.5rem 0.75rem;
    background-color: var(--color-primary);
    color: #ffffff;
    font-family: var(--font-body);
    font-size: 0.82rem;
    line-height: 1.4;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.correction-tooltip.visible {
    opacity: 1;
}

.correction-tooltip strong {
    display: block;
    margin-bottom: 0.2rem;
}

.correction-tooltip-change {
    display: block;
    margin-top: 0.25rem;
    opacity: 0.85;
    font-style: italic;
}

/* --- No Issues State --- */
.results-clean {
    text-align: center;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.results-clean .clean-icon {
    font-size: 2.5rem;
    color: var(--color-success);
    margin-bottom: 0.5rem;
}

.results-clean p {
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* --- Filter Buttons --- */
.results-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.35rem 1rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-muted);
    font-family: var(--font-body);
    transition: background-color var(--transition), color var(--transition),
        border-color var(--transition), box-shadow var(--transition);
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.filter-btn:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

.filter-btn.active {
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    box-shadow: 0 1px 3px rgba(26, 54, 93, 0.3);
}

.filter-btn[data-filter="error"].active {
    background-color: #c53030;
    border-color: #c53030;
    box-shadow: 0 1px 3px rgba(197, 48, 48, 0.3);
}

.filter-btn[data-filter="warning"].active {
    background-color: #b7791f;
    border-color: #b7791f;
    box-shadow: 0 1px 3px rgba(183, 121, 31, 0.3);
}

.filter-btn[data-filter="suggestion"].active {
    background-color: #2b6cb0;
    border-color: #2b6cb0;
    box-shadow: 0 1px 3px rgba(43, 108, 176, 0.3);
}

/* --- Issue Cards --- */
.issue-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.issue-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-border);
    cursor: pointer;
    transition: box-shadow var(--transition), transform var(--transition);
}

.issue-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.issue-card:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

.issue-card--error {
    border-left-color: #c53030;
}

.issue-card--warning {
    border-left-color: #d69e2e;
}

.issue-card--suggestion {
    border-left-color: #3182ce;
}

.issue-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.issue-card-rule {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-primary);
}

.issue-card-ref {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.issue-card-location {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 0.35rem;
}

.issue-card-message {
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: 0.65rem;
}

.issue-card-context {
    background-color: #f9fafb;
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    line-height: 1.6;
    overflow-x: auto;
    word-break: break-word;
}

.issue-card-context .highlight {
    background-color: #fed7d7;
    border-radius: 2px;
    padding: 0.1rem 0.15rem;
}

.issue-card-context .highlight--warning {
    background-color: #fefcbf;
}

.issue-card-context .highlight--suggestion {
    background-color: #bee3f8;
}

.issue-card-suggestion {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.issue-card-suggestion code {
    font-family: var(--font-mono);
    background-color: #f0fff4;
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
    font-size: 0.88rem;
    color: var(--color-success);
}

/* ===== Title Case Rich Output ===== */
.output-rich-box {
    min-height: 5rem;
    padding-right: 5rem;
    color: var(--color-text-muted);
    background: linear-gradient(to bottom, #f9fafb, #f4f5f7);
    border: 2px solid var(--color-border);
    border-left: 3px solid var(--color-accent);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.output-rich-box:has(.word-span) {
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
    border-color: rgba(197, 154, 47, 0.4);
    animation: fadeSlideIn 0.3s ease;
}

/* ===== Filename Output ===== */
.filename-box {
    min-height: auto;
    font-family: var(--font-mono, monospace);
    font-size: 0.9rem;
    word-break: break-all;
    color: var(--color-text);
}

.filename-box.is-placeholder {
    font-family: var(--font-body);
    font-style: italic;
    color: var(--color-text-muted);
}

.word-span {
    cursor: help;
    border-bottom: 1px dotted transparent;
    transition: border-color 0.15s;
}

.word-span:hover {
    border-bottom-color: var(--color-accent);
}

.char-changed {
    background-color: rgba(197, 154, 47, 0.25);
    border-radius: 2px;
}

/* ===== Options Row ===== */
.options-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 2rem;
    margin-bottom: 1.25rem;
    background: var(--color-bg);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.option-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    color: var(--color-text);
}

.option-toggle input[type="checkbox"] {
    accent-color: var(--color-accent);
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

/* ===== Word Counter Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    text-align: center;
}

.stat-card--primary {
    border-color: var(--color-accent);
    border-width: 2px;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.stat-card--primary .stat-value {
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.stat-card--over {
    border-color: #c53030;
}

.stat-card--over .stat-value {
    color: #c53030;
}

/* ===== Word Limit Target ===== */
.word-limit-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.word-limit-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.word-limit-group label {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.95rem;
    margin: 0;
}

.word-limit-group input[type="number"] {
    width: 8rem;
    padding: 0.4rem 0.6rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-text);
    background: #ffffff;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.word-limit-group input[type="number"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.word-limit-progress {
    position: relative;
    height: 0.6rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    overflow: hidden;
}

.word-limit-progress-fill {
    height: 100%;
    width: 0;
    background-color: var(--color-accent);
    transition: width 0.25s ease, background-color 0.25s ease;
}

.word-limit-progress--over .word-limit-progress-fill {
    background-color: #c53030;
}

.word-limit-progress-label {
    display: block;
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

.word-limit-progress-label--over {
    color: #c53030;
    font-weight: 600;
}

/* ===== Selection Badge (Word Counter) ===== */
.selection-badge {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.25rem 0.65rem;
    font-size: 0.8rem;
    color: var(--color-primary);
    background-color: var(--color-accent-light);
    border: 1px solid rgba(197, 154, 47, 0.4);
    border-radius: 999px;
}

/* ===== Field Hint (small explanatory text under a label) ===== */
.field-hint {
    display: block;
    margin-top: -0.25rem;
    margin-bottom: 0.5rem;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ===== Footer ===== */
.site-footer {
    padding: 2rem 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    background-color: var(--color-primary);
    margin-top: auto;
}

.site-footer a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

.site-footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* ===== Accessibility ===== */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
    .site-header {
        padding: 1.5rem 0;
    }

    .site-header h1 {
        font-size: 1.5rem;
    }

    .site-header .container {
        border-left: none;
        padding-left: 0;
    }

    .converter-section {
        padding: 1.25rem;
    }

    .button-row {
        flex-wrap: wrap;
    }

    .button-row .btn-primary,
    .button-row .btn-secondary {
        flex: 1;
        min-width: 0;
    }

    .button-row .btn-tertiary {
        width: 100%;
        order: 3;
    }

    .keyboard-hint {
        text-align: center;
    }

    .input-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.15rem;
    }

    .rules-summary {
        padding: 1.25rem;
    }

    .results-summary {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .issue-card {
        padding: 1rem;
    }

    .issue-card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .toast {
        left: 1rem;
        right: 1rem;
        transform: translateY(8px);
        text-align: center;
    }

    .toast.visible {
        transform: translateY(0);
    }

    .options-row {
        padding: 0.5rem 0.75rem;
    }

    .corrected-text-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }
}