/* ==========================================================================
   Word Counter - stylesheet

   Deliberately its own visual identity, not a re-skin of the site's other
   standalone tools (which use a dark navy/teal theme): a light, compact,
   "paper and ink" look with a single indigo accent, low visual noise, and
   dense information layout so the text editor and its statistics both fit
   comfortably above the fold without competing for space.

   Architecture:
     1. Custom properties (design tokens)
     2. Reset / base
     3. Topbar + mega menu
     4. Page shell / hero
     5. Workspace (editor + stats sidebar)
     6. Keyword density card
     7. Buttons
     8. Informational sections + FAQ
     9. Footer
     10. Scrollbar
     11. Responsive breakpoints
     12. Reduced motion / forced colors
   ========================================================================== */

/* -------------------------------------------------------------------------
   1. Custom properties
   ------------------------------------------------------------------------- */
:root {
    --color-primary: #4f46e5;
    --color-primary-dark: #4338ca;
    --color-primary-soft: rgba(79, 70, 229, 0.12);
    --color-accent: #b45309;
    --color-success: #15803d;
    --color-success-soft: rgba(21, 128, 61, 0.12);
    --color-error: #b91c1c;
    --color-error-soft: rgba(185, 28, 28, 0.1);

    --color-background: #f7f6f2;
    --color-surface: #ffffff;
    --color-surface-muted: #f1efe7;
    --color-border: #ded9cb;
    --color-text: #211f1b;
    --color-muted: #6b6558;
    --color-inverse: #ffffff;

    --color-focus: var(--color-primary);

    --shadow-card: 0 1px 2px rgba(33, 31, 27, 0.04), 0 6px 16px rgba(33, 31, 27, 0.06);
    --radius: 10px;
    --radius-sm: 7px;
    --radius-pill: 999px;

    --space-1: 8px;
    --space-2: 14px;
    --space-3: 20px;
    --space-4: 28px;

    --font-main: Inter, "Segoe UI", Roboto, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

    --transition-fast: 140ms ease;
}

/* -------------------------------------------------------------------------
   2. Reset / base
   ------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

body {
    background: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

h1, h2 {
    line-height: 1.25;
    color: var(--color-text);
}

p {
    margin: 0 0 var(--space-1);
}

ul, ol {
    margin: 0 0 var(--space-1);
    padding-left: 1.25rem;
    color: var(--color-muted);
}

li + li {
    margin-top: 4px;
}

code {
    font-family: var(--font-mono);
    background: var(--color-surface-muted);
    padding: 1px 5px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--color-text);
}

button, select, input, textarea {
    font-family: inherit;
}

:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

.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;
}

.noscript-message {
    max-width: 640px;
    margin: 40px auto;
    padding: var(--space-2);
    text-align: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

/* -------------------------------------------------------------------------
   3. Topbar + mega menu
   ------------------------------------------------------------------------- */
.wc-topbar {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding: 10px var(--space-3);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 30;
}

.wc-topbar-brand,
.wc-footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text);
    font-weight: 800;
    text-decoration: none;
}

.wc-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.wc-brand-text strong {
    font-size: 0.8rem;
    font-weight: 800;
}

.wc-brand-text span {
    font-size: 0.58rem;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.wc-menu-wrap {
    /* Deliberately not position:relative - .wc-menu-dropdown needs to span
       the full viewport width against .wc-topbar (position:sticky still
       establishes a containing block), not this button-sized wrapper. */
}

.wc-menu-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    background: var(--color-surface);
    border-top: 3px solid var(--color-primary);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    z-index: 40;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 220ms cubic-bezier(0.16, 1, 0.3, 1),
                transform 220ms cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}

.wc-menu-dropdown.wc-mega-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.wc-menu-dropdown[hidden] {
    display: none;
}

.wc-mega-menu {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 4px 24px;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px var(--space-3);
}

.wc-mega-heading-spaced {
    margin-top: 14px !important;
}

.wc-mega-col {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

.wc-mega-heading {
    margin: 0 0 6px;
    padding: 0 0 8px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-muted);
}

.wc-menu-dropdown a {
    padding: 6px 8px;
    margin: 0 -8px;
    border-radius: var(--radius-sm);
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.85rem;
}

.wc-menu-dropdown a:hover,
.wc-menu-dropdown a:focus-visible {
    background: var(--color-surface-muted);
    color: var(--color-primary-dark);
}

/* -------------------------------------------------------------------------
   4. Page shell / hero
   ------------------------------------------------------------------------- */
.wc-shell {
    flex: 1 1 auto;
    max-width: 1180px;
    margin: 0 auto;
    padding: 10px var(--space-3) var(--space-4);
    width: 100%;
}

.wc-hero {
    margin-bottom: 8px;
}

.wc-hero h1 {
    font-size: 1.25rem;
    font-weight: 800;
    margin: 0 0 2px;
}

.wc-hero-lede {
    color: var(--color-muted);
    font-size: 0.82rem;
    max-width: 720px;
}

.wc-privacy-notice {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin: 4px 0 0;
    padding: 3px 10px;
    background: var(--color-success-soft);
    border: 1px solid rgba(21, 128, 61, 0.25);
    border-radius: var(--radius-pill);
    color: var(--color-success);
    font-size: 0.76rem;
    font-weight: 600;
}

.wc-privacy-notice svg {
    width: 15px;
    height: 15px;
    fill: currentColor;
    flex-shrink: 0;
}

/* -------------------------------------------------------------------------
   5. Workspace (editor + stats sidebar)
   ------------------------------------------------------------------------- */
.wc-workspace {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-2);
    align-items: stretch;
    margin-bottom: 8px;
}

.wc-editor-col {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: var(--space-2);
}

.wc-textarea {
    width: 100%;
    flex: 1 1 auto;
    min-height: 220px;
    max-width: 100%;
    padding: 12px 14px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: vertical;
}

.wc-textarea:focus {
    border-color: var(--color-primary);
}

.wc-hint {
    margin: 8px 0 0;
    color: var(--color-muted);
    font-size: 0.78rem;
}

.wc-editor-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.wc-action-status {
    margin: 0;
    color: var(--color-success);
    font-size: 0.82rem;
    font-weight: 700;
}

.wc-stats-col {
    display: flex;
    flex-direction: column;
    gap: 7px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 10px var(--space-2);
}

.wc-stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.wc-stat {
    display: flex;
    flex-direction: column;
    gap: 1px;
    padding: 5px 10px;
    background: var(--color-surface-muted);
    border-radius: var(--radius-sm);
}

.wc-stat-value {
    font-size: 1.02rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    font-variant-numeric: tabular-nums;
}

.wc-stat-label {
    font-size: 0.64rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--color-muted);
}

.wc-time-row {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding-top: 6px;
    border-top: 1px solid var(--color-border);
    font-size: 0.8rem;
}

.wc-time-stat {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text);
}

.wc-time-stat svg {
    width: 16px;
    height: 16px;
    fill: var(--color-accent);
    flex-shrink: 0;
}

.wc-time-stat strong {
    font-variant-numeric: tabular-nums;
}

.wc-detail-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3px;
    margin: 0;
    padding-top: 6px;
    border-top: 1px solid var(--color-border);
}

.wc-detail-list > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 0.78rem;
}

.wc-detail-list dt {
    color: var(--color-muted);
}

.wc-detail-list dd {
    margin: 0;
    font-weight: 700;
    color: var(--color-text);
    text-align: right;
    overflow-wrap: anywhere;
    max-width: 60%;
}

/* -------------------------------------------------------------------------
   6. Keyword density card
   ------------------------------------------------------------------------- */
.wc-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    padding: 10px var(--space-2);
    margin-bottom: 8px;
}

.wc-keyword-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
}

.wc-keyword-head h2 {
    font-size: 1rem;
    font-weight: 800;
    margin: 0;
}

.wc-keyword-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    font-size: 0.82rem;
}

.wc-inline-check {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.wc-inline-check input {
    accent-color: var(--color-primary);
}

.wc-select-label {
    display: flex;
    align-items: center;
    gap: 6px;
}

.wc-select-label select {
    padding: 4px 8px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.82rem;
}

.wc-table-wrap {
    max-height: 260px;
    overflow-y: auto;
    overflow-x: auto;
}

.wc-keyword-table thead th {
    position: sticky;
    top: 0;
    background: var(--color-surface);
}

.wc-keyword-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.wc-keyword-table th,
.wc-keyword-table td {
    padding: 7px 10px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.wc-keyword-table th:nth-child(2),
.wc-keyword-table th:nth-child(3),
.wc-keyword-table td:nth-child(2),
.wc-keyword-table td:nth-child(3) {
    text-align: right;
}

.wc-keyword-table th {
    color: var(--color-muted);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-weight: 700;
}

.wc-keyword-table td:first-child {
    font-weight: 700;
    color: var(--color-text);
    white-space: normal;
    overflow-wrap: anywhere;
}

#wc-keyword-empty {
    margin: 6px 0 0;
}

/* -------------------------------------------------------------------------
   7. Buttons
   ------------------------------------------------------------------------- */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 40px;
    padding: 8px var(--space-2);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    background: none;
    color: var(--color-text);
    transition: background-color var(--transition-fast), border-color var(--transition-fast),
        color var(--transition-fast), box-shadow var(--transition-fast);
}

.button:hover:not(:disabled) {
    box-shadow: var(--shadow-card);
}

.button:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.button-primary {
    color: var(--color-inverse);
    background: var(--color-primary);
}

.button-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
}

.button-secondary {
    color: var(--color-primary-dark);
    background: var(--color-surface);
    border-color: var(--color-border);
}

.button-secondary:hover:not(:disabled) {
    border-color: var(--color-primary);
}

.button-ghost {
    color: var(--color-muted);
    background: none;
    border-color: transparent;
}

.button-ghost:hover:not(:disabled) {
    background: var(--color-surface-muted);
    color: var(--color-error);
}

/* -------------------------------------------------------------------------
   8. Informational sections + FAQ
   ------------------------------------------------------------------------- */
.wc-info-section {
    margin-bottom: var(--space-2);
}

.wc-info-section h2 {
    font-size: 1rem;
    font-weight: 800;
    margin: 0 0 6px;
}

.wc-info-section p,
.wc-info-section ol,
.wc-info-section ul {
    color: var(--color-muted);
    font-size: 0.88rem;
}

.wc-info-section p + p {
    margin-top: 8px;
}

.wc-info-section h3 {
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--color-text);
    margin: 12px 0 4px;
}

.wc-info-section h3:first-child {
    margin-top: 0;
}

.wc-steps-list {
    padding-left: 1.25rem;
}

.wc-example-block {
    background: var(--color-surface-muted);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    margin: 8px 0;
    font-size: 0.84rem;
}

.wc-example-block p {
    margin: 0 0 4px;
    font-size: 0.84rem;
}

.wc-example-block p:last-child {
    margin-bottom: 0;
}

.wc-info-table-wrap {
    overflow-x: auto;
    margin: 8px 0;
}

.wc-info-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.wc-info-table th,
.wc-info-table td {
    padding: 6px 10px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.wc-info-table th {
    background: var(--color-surface-muted);
    color: var(--color-text);
    font-weight: 700;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.wc-info-table td {
    color: var(--color-muted);
}

.wc-info-table td:first-child {
    color: var(--color-text);
    font-weight: 600;
    white-space: normal;
}

.wc-faq-section {
    margin-bottom: var(--space-2);
}

.wc-faq-section h2 {
    font-size: 1.05rem;
    font-weight: 800;
    margin: 0 0 var(--space-2);
}

.wc-faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 9px 12px;
    margin-bottom: 6px;
}

.wc-faq-item summary {
    cursor: pointer;
    font-weight: 700;
    font-size: 0.88rem;
}

.wc-faq-item p {
    margin: 6px 0 0;
    color: var(--color-muted);
    font-size: 0.85rem;
}

.wc-page-info {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.76rem;
    font-style: italic;
}

/* -------------------------------------------------------------------------
   9. Footer
   ------------------------------------------------------------------------- */
.wc-big-footer {
    background: var(--color-surface);
    border-top: 3px solid var(--color-primary);
}

.wc-footer-grid {
    display: grid;
    grid-template-columns: 1.6fr repeat(5, 1fr);
    gap: var(--space-3) var(--space-2);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-3) var(--space-3);
}

.wc-footer-col {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

.wc-footer-brand-col {
    gap: var(--space-2);
    padding-right: var(--space-2);
}

.wc-footer-description {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.82rem;
    line-height: 1.6;
}

.wc-footer-col h2 {
    margin: 0 0 6px;
    padding: 0 0 8px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-muted);
}

.wc-footer-heading-spaced {
    margin-top: 14px !important;
}

.wc-footer-col a {
    padding: 4px 0;
    color: var(--color-muted);
    text-decoration: none;
    font-size: 0.8rem;
}

.wc-footer-col a:hover,
.wc-footer-col a:focus-visible {
    color: var(--color-primary-dark);
}

.wc-footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-2) var(--space-3) var(--space-3);
    border-top: 1px solid var(--color-border);
}

.wc-footer-bottom p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.78rem;
}

.wc-footer-back-to-top {
    color: var(--color-primary-dark);
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 700;
    white-space: nowrap;
}

.wc-footer-back-to-top:hover,
.wc-footer-back-to-top:focus-visible {
    text-decoration: underline;
}

.brand-mark {
    display: inline-grid;
    place-items: center;
    border-radius: 8px;
}

/* -------------------------------------------------------------------------
   10. Scrollbar
   ------------------------------------------------------------------------- */
html {
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-surface-muted);
}

.wc-textarea,
.wc-menu-dropdown {
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-surface-muted);
}

*::-webkit-scrollbar {
    width: 7px;
    height: 7px;
}

*::-webkit-scrollbar-track {
    background: var(--color-surface-muted);
}

*::-webkit-scrollbar-thumb {
    background-color: var(--color-primary);
    background-clip: padding-box;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
}

*::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-primary-dark);
}

/* -------------------------------------------------------------------------
   11. Responsive breakpoints
   ------------------------------------------------------------------------- */
@media (max-width: 900px) {
    .wc-workspace {
        grid-template-columns: 1fr;
    }

    .wc-mega-menu {
        gap: 4px 14px;
        padding: 20px 14px;
    }

    .wc-mega-heading {
        font-size: 0.6rem;
    }

    .wc-footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .wc-shell {
        padding: var(--space-2) 12px var(--space-3);
    }

    .wc-hero h1 {
        font-size: 1.4rem;
    }

    .wc-textarea {
        min-height: 260px;
    }

    .wc-editor-actions {
        gap: 6px;
    }

    .wc-editor-actions .button {
        flex: 1 1 auto;
    }

    .wc-stat-grid {
        grid-template-columns: 1fr 1fr;
    }

    .wc-keyword-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .wc-topbar-brand .wc-brand-text {
        display: none;
    }

    .wc-footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* -------------------------------------------------------------------------
   12. Reduced motion / forced colors
   ------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    * {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}

@media (forced-colors: active) {
    .button,
    .wc-textarea,
    .wc-stat {
        border: 1px solid ButtonText;
    }
}