/* ============================================================
   styles.css — Modulo de Calculadoras Financieras
   Virtual Tools | virtualtools.click
   ============================================================ */

/* ============================================================
   1. CUSTOM PROPERTIES (Design Tokens)
   ============================================================ */
:root {
    /* Color palette */
    --calc-bg: #f8fafc;
    --calc-surface: #ffffff;
    --calc-surface-2: #f1f5f9;
    --calc-primary: #0ea5e9;
    --calc-primary-dark: #0284c7;
    --calc-primary-light: #e0f2fe;
    --calc-accent: #6366f1;
    --calc-accent-dark: #4f46e5;
    --calc-accent-light: #eef2ff;
    --calc-text: #0f172a;
    --calc-text-muted: #64748b;
    --calc-border: #e2e8f0;
    --calc-border-focus: #0ea5e9;
    --calc-error: #ef4444;
    --calc-error-bg: #fef2f2;
    --calc-success: #22c55e;

    /* Typography */
    --calc-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --calc-font-size-base: 1rem;
    --calc-font-size-sm: 0.875rem;
    --calc-font-size-xs: 0.75rem;
    --calc-font-size-lg: 1.125rem;
    --calc-font-size-xl: 1.25rem;
    --calc-font-size-2xl: 1.5rem;
    --calc-font-size-3xl: 1.875rem;

    /* Spacing */
    --calc-space-1: 0.25rem;
    --calc-space-2: 0.5rem;
    --calc-space-3: 0.75rem;
    --calc-space-4: 1rem;
    --calc-space-5: 1.25rem;
    --calc-space-6: 1.5rem;
    --calc-space-8: 2rem;
    --calc-space-10: 2.5rem;
    --calc-space-12: 3rem;
    --calc-space-16: 4rem;

    /* Borders & Radius */
    --calc-radius-sm: 0.375rem;
    --calc-radius: 0.5rem;
    --calc-radius-lg: 0.75rem;
    --calc-radius-xl: 1rem;

    /* Shadows */
    --calc-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --calc-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --calc-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --calc-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Transitions */
    --calc-transition: 150ms ease;
    --calc-transition-slow: 250ms ease;
}


/* ============================================================
   2. RESET (scoped to .calc-root)
   ============================================================ */
.calc-root,
.calc-root *,
.calc-root *::before,
.calc-root *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.calc-root {
    font-family: var(--calc-font);
    font-size: var(--calc-font-size-base);
    line-height: 1.6;
    color: var(--calc-text);
    background-color: var(--calc-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.calc-root a {
    color: var(--calc-primary);
    text-decoration: none !important;
    transition: color var(--calc-transition);
}

.calc-root a:hover {
    color: var(--calc-primary-dark);
    text-decoration: underline;
}

.calc-root img {
    max-width: 100%;
    height: auto;
    display: block;
}

.calc-root ul,
.calc-root ol {
    list-style: none;
}

.calc-root button {
    cursor: pointer;
    font-family: inherit;
    border: none;
    background: none;
}

.calc-root input,
.calc-root select,
.calc-root textarea {
    font-family: inherit;
}


/* ============================================================
   3. HEADER
   ============================================================ */
.calc-header {
    background-color: var(--calc-surface);
    border-bottom: 1px solid var(--calc-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--calc-shadow-sm);
}

.calc-header__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--calc-space-6);
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--calc-space-4);
}

.calc-header__logo {
    display: flex;
    align-items: center;
    gap: var(--calc-space-2);
    font-size: var(--calc-font-size-lg);
    font-weight: 700;
    color: var(--calc-text);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.calc-header__logo:hover {
    color: var(--calc-primary);
    text-decoration: none;
}

.calc-header__logo-icon {
    font-size: 1.2em;
    line-height: 1;
}

.calc-header__nav {
    display: flex;
    align-items: center;
    gap: var(--calc-space-6);
}

.calc-header__nav-link {
    font-size: var(--calc-font-size-sm);
    font-weight: 500;
    color: var(--calc-text-muted);
    text-decoration: none;
    padding: var(--calc-space-1) var(--calc-space-2);
    border-radius: var(--calc-radius-sm);
    transition: color var(--calc-transition), background-color var(--calc-transition);
}

.calc-header__nav-link:hover,
.calc-header__nav-link--active {
    color: var(--calc-primary);
    background-color: var(--calc-primary-light);
    text-decoration: none;
}

.calc-header__dropdown {
    position: relative;
}

.calc-header__dropdown > summary {
    display: inline-flex;
    align-items: center;
    gap: var(--calc-space-2);
    list-style: none;
    cursor: pointer;
}

.calc-header__dropdown > summary::-webkit-details-marker {
    display: none;
}

.calc-header__dropdown-icon {
    font-size: 0.65rem;
    line-height: 1;
    transition: transform var(--calc-transition);
}

.calc-header__dropdown[open] .calc-header__dropdown-icon {
    transform: rotate(180deg);
}

.calc-header__dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + var(--calc-space-2));
    min-width: 250px;
    padding: var(--calc-space-2);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    background-color: var(--calc-surface);
    box-shadow: var(--calc-shadow-lg);
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-1);
    z-index: 150;
}

.calc-header__dropdown:not([open]) .calc-header__dropdown-menu {
    display: none;
}

.calc-header__dropdown--active > .calc-header__nav-link {
    color: var(--calc-primary);
    background-color: var(--calc-primary-light);
}

.calc-header__dropdown-link {
    display: block;
    color: var(--calc-text-muted);
    border-radius: var(--calc-radius-sm);
    padding: var(--calc-space-2) var(--calc-space-3);
    font-size: var(--calc-font-size-sm);
    font-weight: 500;
    text-decoration: none;
}

.calc-header__dropdown-link:hover,
.calc-header__dropdown-link--active {
    color: var(--calc-primary);
    background-color: var(--calc-primary-light);
    text-decoration: none;
}

@media (max-width: 768px) {
    .calc-header__inner {
        height: auto;
        min-height: 60px;
        padding-top: var(--calc-space-3);
        padding-bottom: var(--calc-space-3);
        flex-direction: column;
        align-items: flex-start;
    }

    .calc-header__nav {
        width: 100%;
        gap: var(--calc-space-3);
        flex-wrap: wrap;
    }

    .calc-header__dropdown-menu {
        left: 0;
        right: auto;
        min-width: 220px;
    }
}


/* ============================================================
   4. PAGE WRAPPER & CONTAINER
   ============================================================ */
.calc-page-wrapper {
    flex: 1;
}

.calc-main {
    padding: var(--calc-space-8) 0 var(--calc-space-16);
}

.calc-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--calc-space-6);
}


/* ============================================================
   5. BREADCRUMB
   ============================================================ */
.calc-breadcrumb {
    margin-bottom: var(--calc-space-6);
}

.calc-breadcrumb__list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--calc-space-2);
    list-style: none;
}

.calc-breadcrumb__item {
    display: flex;
    align-items: center;
    gap: var(--calc-space-2);
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
}

.calc-breadcrumb__item + .calc-breadcrumb__item::before {
    content: '/';
    color: var(--calc-border);
}

.calc-breadcrumb__link {
    color: var(--calc-text-muted);
    text-decoration: none;
    transition: color var(--calc-transition);
}

.calc-breadcrumb__link:hover {
    color: var(--calc-primary);
    text-decoration: none;
}

.calc-breadcrumb__item--current {
    color: var(--calc-text);
    font-weight: 500;
}


/* ============================================================
   6. PAGE TITLE & INTRO
   ============================================================ */
.calc-page-title {
    font-size: var(--calc-font-size-3xl);
    font-weight: 700;
    color: var(--calc-text);
    letter-spacing: -0.025em;
    line-height: 1.2;
    margin-bottom: var(--calc-space-4);
}

.calc-intro-text {
    font-size: var(--calc-font-size-lg);
    color: var(--calc-text-muted);
    line-height: 1.7;
    max-width: 72ch;
    margin-bottom: var(--calc-space-8);
}


/* ============================================================
   7. TWO-COLUMN LAYOUT (main + aside)
   ============================================================ */
.calc-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--calc-space-8);
    align-items: start;
    margin-top: var(--calc-space-6);
}

.calc-layout__main {
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-6);
    min-width: 0;
}

.calc-layout__aside {
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-6);
    position: sticky;
    top: 76px;
}

@media (max-width: 768px) {
    .calc-layout {
        grid-template-columns: 1fr;
    }

    .calc-layout__aside {
        position: static;
        order: -1;
    }
}


/* ============================================================
   8. CARD
   ============================================================ */
.calc-card {
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    padding: var(--calc-space-6);
    box-shadow: var(--calc-shadow);
}

.calc-card__title {
    font-size: var(--calc-font-size-xl);
    font-weight: 600;
    color: var(--calc-text);
    margin-bottom: var(--calc-space-5);
    padding-bottom: var(--calc-space-4);
    border-bottom: 1px solid var(--calc-border);
}


/* ============================================================
   9. FORM
   ============================================================ */
.calc-form {
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-4);
}

.calc-form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--calc-space-4);
}

@media (max-width: 600px) {
    .calc-form__row {
        grid-template-columns: 1fr;
    }
}

.calc-form__group {
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-1);
}

.calc-form__label {
    font-size: var(--calc-font-size-sm);
    font-weight: 600;
    color: var(--calc-text);
    letter-spacing: 0.01em;
}

.calc-form__input,
.calc-form__select {
    width: 100%;
    padding: var(--calc-space-3) var(--calc-space-4);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    font-size: var(--calc-font-size-base);
    color: var(--calc-text);
    background-color: var(--calc-surface);
    transition: border-color var(--calc-transition), box-shadow var(--calc-transition);
    appearance: none;
    -webkit-appearance: none;
}

.calc-form__input--invalid,
.calc-form__select--invalid,
.calc-root .input-validation-error {
    border-color: var(--calc-error) !important;
    background-color: var(--calc-error-bg);
}

.calc-root .field-validation-error {
    color: var(--calc-error);
    font-size: var(--calc-font-size-xs);
    font-weight: 500;
}

.calc-form__select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--calc-space-3) center;
    padding-right: var(--calc-space-8);
    cursor: pointer;
}

.calc-form__input:focus,
.calc-form__select:focus {
    outline: none;
    border-color: var(--calc-border-focus);
    box-shadow: 0 0 0 3px rgb(14 165 233 / 0.15);
}

.calc-form__input::placeholder {
    color: var(--calc-text-muted);
    opacity: 0.7;
}

.calc-form__hint {
    font-size: var(--calc-font-size-xs);
    color: var(--calc-text-muted);
    line-height: 1.4;
}

.calc-form__error {
    font-size: var(--calc-font-size-xs);
    color: var(--calc-error);
    font-weight: 500;
    display: block;
    min-height: 1em;
}

.calc-form__actions {
    padding-top: var(--calc-space-2);
}


/* ============================================================
   10. BUTTON
   ============================================================ */
.calc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: var(--calc-space-3) var(--calc-space-6);
    background-color: var(--calc-primary) !important;
    color: #ffffff;
    font-size: var(--calc-font-size-base);
    font-weight: 600;
    border-radius: var(--calc-radius);
    border: none;
    cursor: pointer;
    transition: background-color var(--calc-transition), box-shadow var(--calc-transition), transform var(--calc-transition);
    letter-spacing: 0.01em;
    line-height: 1.5;
}

.calc-btn:hover {
    background-color: var(--calc-primary-dark);
    box-shadow: var(--calc-shadow-md);
    transform: translateY(-1px);
}

.calc-btn:active {
    transform: translateY(0);
    box-shadow: var(--calc-shadow-sm);
}

.calc-btn:focus-visible {
    outline: 2px solid var(--calc-primary);
    outline-offset: 3px;
}

.calc-btn--secondary {
    background-color: transparent;
    color: var(--calc-primary);
    border: 1.5px solid var(--calc-primary);
    width: auto;
}

.calc-btn--secondary:hover {
    background-color: var(--calc-primary-light);
    box-shadow: none;
}


/* ============================================================
   11. ALERT
   ============================================================ */
.calc-alert {
    padding: var(--calc-space-4) var(--calc-space-5);
    border-radius: var(--calc-radius);
    font-size: var(--calc-font-size-sm);
    border-left: 4px solid;
}

.calc-alert--error {
    background-color: var(--calc-error-bg);
    border-color: var(--calc-error);
    color: #991b1b;
}


/* ============================================================
   12. RESULTS
   ============================================================ */
.calc-results {
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    padding: var(--calc-space-6);
    box-shadow: var(--calc-shadow);
}

.calc-results__title {
    font-size: var(--calc-font-size-xl);
    font-weight: 700;
    color: var(--calc-text);
    margin-bottom: var(--calc-space-5);
    letter-spacing: -0.015em;
}

.calc-results__subtitle {
    font-size: var(--calc-font-size-base);
    font-weight: 600;
    color: var(--calc-text);
    margin-top: var(--calc-space-6);
    margin-bottom: var(--calc-space-3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: var(--calc-font-size-xs);
    color: var(--calc-text-muted);
}


/* ============================================================
   13. KPI BOXES
   ============================================================ */
.calc-result__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--calc-space-4);
}

.calc-result__grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
    .calc-result__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .calc-result__grid--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .calc-result__grid,
    .calc-result__grid--4 {
        grid-template-columns: 1fr;
    }
}

.calc-result__kpi {
    background-color: var(--calc-bg);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
    padding: var(--calc-space-4) var(--calc-space-5);
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-1);
}

.calc-result__kpi-label {
    font-size: var(--calc-font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--calc-text-muted);
    line-height: 1.3;
}

.calc-result__kpi-value {
    font-size: var(--calc-font-size-2xl);
    font-weight: 700;
    color: var(--calc-accent);
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.calc-result__kpi-value--accent {
    color: var(--calc-accent);
}


/* ============================================================
   14. TABLE
   ============================================================ */
.calc-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: var(--calc-space-4);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius);
}

.calc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--calc-font-size-sm);
    font-variant-numeric: tabular-nums;
}

.calc-table thead {
    background-color: var(--calc-bg);
}

.calc-table thead th {
    padding: var(--calc-space-3) var(--calc-space-4);
    text-align: left;
    font-size: var(--calc-font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--calc-text-muted);
    border-bottom: 2px solid var(--calc-border);
    white-space: nowrap;
}

.calc-table tbody tr {
    border-bottom: 1px solid var(--calc-border);
    transition: background-color var(--calc-transition);
}

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

.calc-table tbody tr:hover {
    background-color: var(--calc-primary-light);
}

.calc-table tbody td {
    padding: var(--calc-space-3) var(--calc-space-4);
    color: var(--calc-text);
    vertical-align: middle;
}

/* Truncated table — hide rows after 12th */
.calc-table--truncated tbody tr:nth-child(n+13) {
    display: none;
}

/* Expanded table — show all rows */
.calc-table--expanded tbody tr {
    display: table-row;
}

.calc-table-actions {
    margin-top: var(--calc-space-4);
    display: flex;
    justify-content: center;
}


/* ============================================================
   15. HUB GRID & CARDS
   ============================================================ */
.calc-hub {
    margin-bottom: var(--calc-space-8);
}

.calc-hub__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--calc-space-5);
}

@media (max-width: 640px) {
    .calc-hub__grid {
        grid-template-columns: 1fr;
    }
}

.calc-hub__card {
    background-color: var(--calc-surface);
    border: 1.5px solid var(--calc-border);
    border-radius: var(--calc-radius-xl);
    padding: var(--calc-space-6);
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-3);
    text-decoration: none;
    color: var(--calc-text);
    transition:
        border-color var(--calc-transition-slow),
        box-shadow var(--calc-transition-slow),
        transform var(--calc-transition-slow);
}

.calc-hub__card:hover {
    border-color: var(--calc-primary);
    box-shadow: var(--calc-shadow-lg);
    transform: translateY(-3px);
    text-decoration: none;
    color: var(--calc-text);
}

.calc-hub__card-icon {
    font-size: 2.25rem;
    line-height: 1;
    display: block;
}

.calc-hub__card-title {
    font-size: var(--calc-font-size-xl);
    font-weight: 700;
    color: var(--calc-text);
    letter-spacing: -0.015em;
    line-height: 1.3;
}

.calc-hub__card-desc {
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
    line-height: 1.6;
    flex: 1;
}

.calc-hub__card-cta {
    font-size: var(--calc-font-size-sm);
    font-weight: 600;
    color: var(--calc-primary);
    margin-top: var(--calc-space-2);
    display: inline-block;
    transition: gap var(--calc-transition);
}


/* ============================================================
   16. AD SLOTS
   ============================================================ */
.calc-ad-slot {
    background-color: var(--calc-surface-2);
    border: 2px dashed var(--calc-border);
    border-radius: var(--calc-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--calc-space-2);
    color: var(--calc-text-muted);
}

.calc-ad-slot__label {
    font-size: var(--calc-font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
    opacity: 0.6;
}

.calc-ad-slot--leaderboard {
    width: 100%;
    min-height: 90px;
    margin-bottom: var(--calc-space-8);
}

.calc-ad-slot--rectangle {
    width: 300px;
    min-height: 250px;
    margin: var(--calc-space-4) 0;
}

.calc-ad-slot--sidebar {
    width: 100%;
    min-height: 600px;
}

@media (max-width: 768px) {
    .calc-ad-slot--rectangle {
        width: 100%;
    }

    .calc-ad-slot--sidebar {
        min-height: 250px;
    }
}


/* ============================================================
   17. FAQ ACCORDION
   ============================================================ */
.calc-faq {
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    padding: var(--calc-space-6);
    box-shadow: var(--calc-shadow-sm);
}

.calc-faq__title {
    font-size: var(--calc-font-size-xl);
    font-weight: 700;
    color: var(--calc-text);
    margin-bottom: var(--calc-space-5);
    letter-spacing: -0.015em;
}

.calc-faq__item {
    border-bottom: 1px solid var(--calc-border);
}

.calc-faq__item:last-child {
    border-bottom: none;
}

.calc-faq__question {
    width: 100%;
    text-align: left;
    padding: var(--calc-space-4) 0;
    font-size: var(--calc-font-size-base);
    font-weight: 600;
    color: var(--calc-text);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--calc-space-4);
    background: none;
    border: none;
    line-height: 1.5;
    transition: color var(--calc-transition);
}

.calc-faq__question:hover {
    color: var(--calc-primary);
}

.calc-faq__question:focus-visible {
    outline: 2px solid var(--calc-primary);
    outline-offset: 2px;
    border-radius: var(--calc-radius-sm);
}

.calc-faq__icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--calc-primary-light);
    color: var(--calc-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: var(--calc-font-size-lg);
    font-weight: 700;
    line-height: 1;
    transition: background-color var(--calc-transition), transform var(--calc-transition);
}

.calc-faq__question[aria-expanded="true"] .calc-faq__icon {
    background-color: var(--calc-primary);
    color: #ffffff;
    transform: rotate(45deg);
}

.calc-faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--calc-transition-slow) ease, padding var(--calc-transition-slow) ease;
}

.calc-faq__answer.open {
    max-height: 600px;
}

.calc-faq__answer p {
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
    line-height: 1.7;
    padding-bottom: var(--calc-space-4);
}


/* ============================================================
   18. EXPLAINER SECTION
   ============================================================ */
.calc-explainer {
    background-color: var(--calc-accent-light);
    border: 1px solid #c7d2fe;
    border-left: 4px solid var(--calc-accent);
    border-radius: var(--calc-radius);
    padding: var(--calc-space-5) var(--calc-space-6);
}

.calc-explainer__title {
    font-size: var(--calc-font-size-lg);
    font-weight: 700;
    color: var(--calc-text);
    margin-bottom: var(--calc-space-3);
    letter-spacing: -0.01em;
}

.calc-explainer p {
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
    line-height: 1.7;
}

.calc-explainer strong {
    color: var(--calc-text);
    font-weight: 600;
}


/* ============================================================
   19. ASIDE NAVIGATION
   ============================================================ */
.calc-aside-nav {
    background-color: var(--calc-surface);
    border: 1px solid var(--calc-border);
    border-radius: var(--calc-radius-lg);
    padding: var(--calc-space-5);
}

.calc-aside-nav__title {
    font-size: var(--calc-font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--calc-text-muted);
    margin-bottom: var(--calc-space-3);
}

.calc-aside-nav__list {
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-1);
}

.calc-aside-nav__link {
    display: block;
    padding: var(--calc-space-2) var(--calc-space-3);
    font-size: var(--calc-font-size-sm);
    font-weight: 500;
    color: var(--calc-text);
    border-radius: var(--calc-radius-sm);
    transition: background-color var(--calc-transition), color var(--calc-transition);
    text-decoration: none;
}

.calc-aside-nav__link:hover {
    background-color: var(--calc-primary-light);
    color: var(--calc-primary);
    text-decoration: none;
}


/* ============================================================
   20. FOOTER
   ============================================================ */
.calc-footer {
    background-color: var(--calc-surface-2);
    border-top: 1px solid var(--calc-border);
    padding: var(--calc-space-8) 0;
    margin-top: auto;
}

.calc-footer__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--calc-space-6);
    display: flex;
    flex-direction: column;
    gap: var(--calc-space-4);
    align-items: center;
    text-align: center;
}

.calc-footer__copy {
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
}

.calc-footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--calc-space-4) var(--calc-space-6);
    justify-content: center;
}

.calc-footer__link {
    font-size: var(--calc-font-size-sm);
    color: var(--calc-text-muted);
    text-decoration: none;
    transition: color var(--calc-transition);
}

.calc-footer__link:hover {
    color: var(--calc-primary);
    text-decoration: none;
}


/* ============================================================
   21. UTILITIES
   ============================================================ */

/* Screen reader only */
.calc-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus visible utility */
.calc-root :focus-visible {
    outline: 2px solid var(--calc-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .calc-header,
    .calc-footer,
    .calc-ad-slot,
    .calc-layout__aside,
    .calc-btn {
        display: none !important;
    }

    .calc-layout {
        grid-template-columns: 1fr;
    }

    .calc-table--truncated tbody tr:nth-child(n+13) {
        display: table-row;
    }
}