/* ==========================================================================
   layout.css
   Purpose: Layout-specific styles for TechieBlog main layout structure.
   Extracted from mockups/styles.css for the Header, Footer, Sidebar, and
   main content layout grid system.

   Dependencies: CSS custom properties from Themes/_variables.css
   Usage: Imported in _Host.cshtml for all public-facing pages

   Layout Structure:
   .layout > .header + .main-wrapper (.main-content + .sidebar) + .footer
   ========================================================================== */

/* ==========================================================================
   LAYOUT CONTAINER
   Root layout wrapper using flexbox for sticky footer pattern
   ========================================================================== */

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

/* ==========================================================================
   HEADER COMPONENT
   Sticky top navigation bar with logo, nav links, and action buttons
   ========================================================================== */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--spacing-lg);
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

/* Logo/brand link in header */
.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-semibold);
    color: var(--color-neutral);
    text-decoration: none;
}

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

/* Navigation links container in header */
.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Individual nav link styling */
.header__nav-link {
    color: var(--color-neutral-light);
    font-size: var(--font-size-small);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Action buttons container (search, theme toggle, auth buttons) */
.header__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Hamburger menu button (mobile only) */
.header__menu-btn {
    display: none;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--color-neutral-light);
    cursor: pointer;
}

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

/* ==========================================================================
   MAIN CONTENT AREA
   Flexible content wrapper with sidebar support
   ========================================================================== */

.main-wrapper {
    display: flex;
    flex: 1;
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: var(--spacing-lg);
    width: 100%;
}

/* Primary content column */
.main-content {
    flex: 1;
    min-width: 0; /* Prevents flex item overflow */
}

/* Full-width content variant (no sidebar) */
.main-content--full {
    max-width: 800px;
    margin: 0 auto;
}

/* ==========================================================================
   SIDEBAR COMPONENT
   Right-aligned sidebar for widgets and secondary navigation
   ========================================================================== */

.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    padding-left: var(--spacing-xl);
}

/* Left-aligned sidebar variant */
.sidebar--left {
    padding-left: 0;
    padding-right: var(--spacing-xl);
}

/* Sidebar content section (categories, tags, etc.) */
.sidebar__section {
    margin-bottom: var(--spacing-xl);
}

/* Sidebar section title */
.sidebar__title {
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-neutral-light);
    margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   FOOTER COMPONENT
   Site-wide footer with copyright and links
   ========================================================================== */

.footer {
    padding: var(--spacing-xl) var(--spacing-lg);
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: var(--font-size-small);
    color: var(--color-neutral-light);
}

.footer__content {
    max-width: var(--max-content-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer__links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer__link {
    color: var(--color-neutral-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer__theme-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-neutral-light);
}

/* ==========================================================================
   THEME TOGGLE BUTTON
   Light/dark mode toggle button styling
   ========================================================================== */

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    color: var(--color-neutral-light);
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--color-surface);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.theme-toggle__icon {
    width: 20px;
    height: 20px;
}

/* Sun icon shown in dark mode, moon shown in light mode */
.theme-toggle__sun {
    display: none;
}

.theme-toggle__moon {
    display: block;
}

[data-theme="dark"] .theme-toggle__sun {
    display: block;
}

[data-theme="dark"] .theme-toggle__moon {
    display: none;
}

/* ==========================================================================
   MOBILE NAVIGATION DRAWER
   Slide-out navigation for mobile devices
   ========================================================================== */

.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 200;
    visibility: hidden;
    opacity: 0;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-nav--open {
    visibility: visible;
    opacity: 1;
}

/* Backdrop overlay */
.mobile-nav__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
}

/* Drawer panel */
.mobile-nav__drawer {
    position: absolute;
    top: 0;
    left: 0;
    width: 280px;
    height: 100%;
    background-color: var(--color-background);
    box-shadow: var(--shadow-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.mobile-nav--open .mobile-nav__drawer {
    transform: translateX(0);
}

/* Drawer header with close button */
.mobile-nav__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.mobile-nav__title {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-semibold);
    color: var(--color-neutral);
}

.mobile-nav__close {
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--color-neutral-light);
    cursor: pointer;
}

.mobile-nav__close:hover {
    color: var(--color-primary);
}

/* Navigation links in drawer */
.mobile-nav__links {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.mobile-nav__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--color-neutral);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: background-color var(--transition-fast);
}

.mobile-nav__link:hover,
.mobile-nav__link.active {
    background-color: var(--color-surface);
    color: var(--color-primary);
    text-decoration: none;
}

/* Footer section in drawer */
.mobile-nav__footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ==========================================================================
   RESPONSIVE HELPERS
   Utility classes for showing/hiding elements at breakpoints
   ========================================================================== */

.hide-mobile {
    display: block;
}

.show-mobile {
    display: none;
}

.hide-tablet {
    display: block;
}

.show-tablet {
    display: none;
}

/* ==========================================================================
   NAVIGATION MENU
   Sidebar navigation menu for categories
   ========================================================================== */

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-menu__link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-neutral);
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.nav-menu__link:hover {
    background-color: var(--color-surface);
    text-decoration: none;
}

.nav-menu__link--active {
    background-color: var(--color-primary);
    /* REQ-UI-033: was a hardcoded `white` — unreadable on the Minimal dark theme's
       near-white --primary. The token pairs correctly in every theme x mode. */
    color: var(--color-primary-foreground);
}

/* ==========================================================================
   TAGS CLOUD
   Tag badges for sidebar
   ========================================================================== */

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    background-color: var(--color-surface);
    border-radius: var(--border-radius);
    color: var(--color-neutral-light);
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--color-primary);
    /* REQ-UI-033: see .nav-menu__link--active — hardcoded `white` replaced by the paired token. */
    color: var(--color-primary-foreground);
    text-decoration: none;
}

/* ==========================================================================
   SUBSCRIBE FORM
   Newsletter subscription form in sidebar
   ========================================================================== */

.subscribe-form {
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border-radius: var(--border-radius-lg);
}

.subscribe-form__title {
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.subscribe-form__text {
    font-size: var(--font-size-small);
    color: var(--color-neutral-light);
    margin-bottom: var(--spacing-md);
}

/* ==========================================================================
   SEARCH BOX
   Search input with icon
   ========================================================================== */

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

.search-box__icon {
    position: absolute;
    left: var(--spacing-md);
    color: var(--color-neutral-light);
    pointer-events: none;
}

/* ==========================================================================
   AUTH PAGE STYLES
   Styles for authentication pages (login, register, forgot/reset password)
   ========================================================================== */

/* Auth page wrapper - centers the card vertically and horizontally */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    min-height: calc(100vh - var(--header-height, 56px) - 80px);
    padding: var(--spacing-lg, 24px);
}

/* Auth card - the form container */
.auth-card {
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-xl, 32px);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg, 8px);
    box-shadow: var(--shadow-md);
}

/* Auth card header */
.auth-card__header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.auth-card__title {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-bold);
    color: var(--color-neutral);
    margin: 0 0 var(--spacing-xs) 0;
}

.auth-card__subtitle {
    font-size: var(--font-size-small);
    color: var(--color-neutral-light);
    margin: 0;
}

/* Auth card footer (switch between login/register) */
.auth-card__footer {
    text-align: center;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-small);
    color: var(--color-neutral-light);
}

/* Auth links */
.auth-link {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.auth-link:hover {
    color: var(--color-primary-dark, var(--color-primary));
    text-decoration: underline;
}

.auth-link--small {
    font-size: var(--font-size-small);
}

/* ==========================================================================
   FORM STYLES
   Form group, label, hint, and error/success message styles
   ========================================================================== */

/* Form group container */
.form-group {
    margin-bottom: var(--spacing-md);
}

/* Inline form group (checkbox + link on same row) */
.form-group--inline {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Form label */
.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    color: var(--color-neutral);
}

/* Form hint text (password requirements, etc.) */
.form-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-neutral-light);
}

/* Form error message */
.form-error {
    display: block;
    margin-top: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-small);
    /* REQ-UI-033: hardcoded hex fallbacks and an rgba() tint replaced by token derivations,
       so the tint tracks the theme instead of staying Bootstrap red on every surface. */
    color: var(--color-danger);
    background-color: color-mix(in oklab, var(--color-danger) 12%, transparent);
    border: 1px solid var(--color-danger);
    border-radius: var(--border-radius);
}

/* Form success message */
.form-success {
    display: block;
    margin-top: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-small);
    /* REQ-UI-033: see .form-error — token derivations replace the hardcoded pair. */
    color: var(--color-success);
    background-color: color-mix(in oklab, var(--color-success) 12%, transparent);
    border: 1px solid var(--color-success);
    border-radius: var(--border-radius);
}

/* Form field error state */
.form-field--error input,
.form-field--error fluent-text-field {
    border-color: var(--color-danger) !important;
}

/* ==========================================================================
   RESPONSIVE BREAKPOINTS
   Mobile: < 768px, Tablet: 768-1199px, Desktop: >= 1200px
   ========================================================================== */

/* Tablet Breakpoint (768px - 1199px) */
@media (max-width: 1199px) {
    .sidebar {
        width: 240px;
    }

    .header__nav {
        gap: var(--spacing-md);
    }

    .hide-tablet {
        display: none;
    }

    .show-tablet {
        display: block;
    }
}

/* Mobile Breakpoint (< 768px) */
@media (max-width: 767px) {
    .main-wrapper {
        flex-direction: column;
        padding: var(--spacing-md);
    }

    .sidebar {
        width: 100%;
        padding-left: 0;
        padding-top: var(--spacing-xl);
        order: 2;
    }

    .sidebar--left {
        padding-right: 0;
        order: -1;
        padding-top: 0;
        padding-bottom: var(--spacing-xl);
    }

    /* Hide desktop nav on mobile */
    .header__nav {
        display: none;
    }

    /* Show hamburger menu on mobile */
    .header__menu-btn {
        display: flex;
    }

    .hide-mobile {
        display: none !important;
    }

    .show-mobile {
        display: block !important;
    }

    /* Footer stacks on mobile */
    .footer__content {
        gap: var(--spacing-md);
    }

    .footer__links {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
}

/* ==========================================================================
   ADMIN STATISTICS ROW (REQ-FN-027)
   The compiled TrBlazeUI utility set has no responsive `basis-*` variants, so
   the row that pairs a value chip, a label and a four-button action cluster
   needs a real rule: one line from tablet up, stacked on a phone where the
   label would otherwise collide with the buttons.
   ========================================================================== */

.stat-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.stat-row__body {
    flex: 1 1 0%;
    min-width: 0;
    overflow-wrap: anywhere;
}

.stat-row__actions {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    margin-left: auto;
}

@media (max-width: 767px) {
    .stat-row {
        flex-wrap: wrap;
    }

    .stat-row__body {
        flex-basis: 100%;
    }

    .stat-row__actions {
        margin-left: auto;
    }
}