/* ============================================================
   MOBILE-FIRST PROFESSIONAL UX/UI OVERHAUL
   ============================================================ */

/* ---------- Collapsible Mobile Nav ---------- */
.mobile-nav-collapsible {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px;
}
.mobile-nav-header {
    display: flex;
    align-items: center;
    gap: 8px;
}
.mobile-nav-arrow {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}
.mobile-nav-arrow:hover {
    background: var(--accent-dark);
}
.mobile-nav-close {
    background: #be123c;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
}
.mobile-nav-close:hover {
    background: #9f1239;
}
.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 12px;
}
.mobile-nav-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}
.mobile-nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--accent-dark);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.15s;
    white-space: nowrap;
}
.mobile-nav-links a:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.nav-icon {
    width: 10px;
    height: 10px;
    flex-shrink: 0;
    stroke: var(--accent-dark);
}
.mobile-nav-links a:hover .nav-icon {
    stroke: #fff;
}
.mobile-nav-links a.active .nav-icon {
    stroke: var(--accent-dark);
}
.mobile-nav-links a.active {
    background: rgba(15, 118, 110, .10);
    color: var(--accent-dark);
    border-color: var(--accent);
}
.mobile-nav-divider {
    display: none;
}
.site-nav {
    display: none !important;
}
.nav-search-main {
    display: none !important;
}
.mobile-nav-toggle {
    display: flex !important;
    align-items: center;
    justify-content: center;
}
@media (max-width: 768px) {
    .carousel-btn,
    .carousel-prev,
    .carousel-next {
        display: none !important;
    }
    .nav-admin-toggle {
        display: none !important;
    }
    .bottom-nav {
        display: flex !important;
    }
    body {
        padding-bottom: 72px !important;
    }
}
@media (max-width: 768px) {
    :root {
        --radius: 12px;
        --shadow: 0 1px 3px rgba(20, 20, 18, .06), 0 4px 12px rgba(20, 20, 18, .08);
    }
}

/* ---------- Base Mobile Typography ---------- */
@media (max-width: 640px) {
    body {
        font-size: 16px;
        line-height: 1.65;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    .container {
        padding-inline: 16px;
    }
}

/* ---------- Header Mobile ---------- */
@media (max-width: 768px) {
    .site-header {
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }
    .header-inner {
        height: 56px;
        gap: 8px;
        padding-inline: 12px;
    }
    .brand-name {
        font-size: 18px;
        letter-spacing: -.01em;
    }
    .brand-logo {
        width: 26px;
        height: 26px;
    }
    .site-nav {
        gap: 8px;
    }
    .nav-admin {
        font-size: 11px;
        padding: 3px 6px;
    }
}

/* ---------- Mobile Navigation Toggle ---------- */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text);
    border-radius: 8px;
    transition: background 0.15s;
}
.mobile-nav-toggle:hover {
    background: var(--border);
}
.mobile-nav-toggle svg {
    width: 24px;
    height: 24px;
}
@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .mobile-nav-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 9998;
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        animation: fadeIn 0.2s ease;
    }
    .mobile-nav-overlay.open {
        display: block;
    }
    .mobile-nav-drawer {
        display: none;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        max-width: 85vw;
        background: var(--surface);
        z-index: 9999;
        padding: 20px;
        overflow-y: auto;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    }
    .mobile-nav-drawer.open {
        display: block;
        transform: translateX(0);
    }
    .mobile-nav-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 20px;
        padding-bottom: 16px;
        border-bottom: 1px solid var(--border);
    }
    .mobile-nav-close {
        background: none;
        border: none;
        cursor: pointer;
        padding: 8px;
        color: var(--muted);
        border-radius: 8px;
    }
    .mobile-nav-close:hover {
        background: var(--border);
        color: var(--text);
    }
    .mobile-nav-links {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }
    .mobile-nav-links a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 16px;
        border-radius: 10px;
        color: var(--text);
        text-decoration: none;
        font-size: 15px;
        font-weight: 500;
        transition: background 0.15s;
    }
    .mobile-nav-links a:hover {
        background: var(--bg);
    }
    .mobile-nav-links a.active {
        background: rgba(15, 118, 110, .10);
        color: var(--accent-dark);
    }
    .mobile-nav-links .mobile-nav-divider {
        height: 1px;
        background: var(--border);
        margin: 8px 0;
    }
}

/* ---------- Hero Mobile ---------- */
@media (max-width: 768px) {
    .hero-premium {
        min-height: auto;
        padding-block: 0;
    }
    .hero-premium .hero-inner {
        padding: 32px 16px 24px;
    }
    .hero-premium .hero-title {
        font-size: 24px;
        line-height: 1.2;
        margin-bottom: 12px;
    }
    .hero-premium .hero-sub {
        font-size: 14px;
        line-height: 1.5;
        margin-bottom: 20px;
        max-width: 100%;
    }
    .hero-badge {
        font-size: 11px;
        padding: 4px 10px;
        margin-bottom: 12px;
    }
    .hero-actions {
        gap: 8px;
        margin-bottom: 20px;
    }
    .hero-actions .btn-hero,
    .hero-actions .btn-hero-ghost {
        padding: 10px 16px;
        font-size: 13px;
        border-radius: 8px;
    }
    .hero-stats {
        gap: 16px;
        flex-wrap: wrap;
    }
    .hero-stats div {
        min-width: 70px;
    }
    .hero-stats strong {
        font-size: 16px;
    }
    .hero-stats span {
        font-size: 9px;
    }
}

/* ---------- Post Grid Mobile ---------- */
@media (max-width: 640px) {
    .post-grid,
    .featured-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .post-card {
        border-radius: 12px;
    }
    .post-card-cover {
        aspect-ratio: 16 / 9;
    }
    .post-card-title {
        font-size: 18px;
        margin: 14px 16px 6px;
    }
    .post-card-excerpt {
        font-size: 14px;
        margin: 0 16px 12px;
        -webkit-line-clamp: 2;
    }
    .post-card-meta {
        padding: 0 16px 14px;
        font-size: 12px;
        gap: 6px;
    }
}

@media (min-width: 641px) and (max-width: 880px) {
    .post-grid,
    .featured-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* ---------- Container Mobile ---------- */
@media (max-width: 640px) {
    .container {
        padding-inline: 16px;
    }
}

/* ---------- Section Mobile ---------- */
@media (max-width: 640px) {
    .section {
        padding-block: 32px;
    }
    .section-head {
        margin-bottom: 20px;
    }
    .section-title {
        font-size: 22px;
    }
}

/* ---------- Single Post Mobile ---------- */
@media (max-width: 640px) {
    .post {
        padding-block: 24px;
    }
    .post-container {
        padding-inline: 0;
    }
    .post-title {
        font-size: 24px;
        line-height: 1.2;
    }
    .post-lede {
        font-size: 17px;
    }
    .post-meta {
        font-size: 13px;
        gap: 6px;
    }
    .prose {
        font-size: 17px;
        line-height: 1.7;
    }
    .prose h2 {
        font-size: 22px;
        margin: 32px 0 12px;
    }
    .prose h3 {
        font-size: 19px;
        margin: 24px 0 10px;
    }
    .post-cover {
        border-radius: 10px;
        margin: 8px 0 24px;
    }
    .breadcrumb {
        font-size: 12px;
        margin-bottom: 20px;
    }
    .share {
        flex-wrap: wrap;
        gap: 8px;
    }
    .share-btn {
        width: 36px;
        height: 36px;
    }
}

/* ---------- Author Card Mobile ---------- */
@media (max-width: 640px) {
    .author-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .author-card-avatar {
        width: 64px;
        height: 64px;
    }
}

/* ---------- Forms Mobile ---------- */
@media (max-width: 640px) {
    .field input,
    .field textarea,
    .field select {
        font-size: 16px; /* Prevents iOS zoom */
        padding: 12px 14px;
    }
    .field-row {
        grid-template-columns: 1fr;
    }
    .auth-card {
        padding: 24px 20px;
        margin-inline: 16px;
    }
    .auth-title {
        font-size: 22px;
    }
}

/* ---------- Bottom Nav Mobile ---------- */
@media (max-width: 768px) {
    .bottom-nav {
        padding: 8px 4px 10px;
        box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.1);
    }
    .bottom-nav-item {
        min-width: 48px;
        padding: 6px 4px;
    }
    .bottom-nav-item svg {
        width: 20px;
        height: 20px;
    }
    .bottom-nav-item span {
        font-size: 9px;
    }
}

/* ---------- Footer Mobile ---------- */
@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .footer-copy {
        text-align: center;
    }
    .site-footer {
        padding-block: 32px;
        margin-top: 32px;
    }
}

/* ---------- Trust Strip Mobile ---------- */
@media (max-width: 640px) {
    .trust-strip {
        gap: 12px;
        padding: 12px 0;
        font-size: 12px;
    }
    .trust-strip span {
        gap: 6px;
    }
}

/* ---------- Most Visited Mobile ---------- */
@media (max-width: 640px) {
    .mv-item {
        padding: 10px;
        gap: 10px;
    }
    .mv-rank {
        font-size: 18px;
        width: 24px;
    }
    .mv-thumb {
        width: 90px;
        height: 60px;
    }
    .mv-body h3 {
        font-size: 14px;
    }
}

/* ---------- Category Carousel Mobile ---------- */
@media (max-width: 640px) {
    .cat-carousel {
        grid-auto-columns: minmax(80px, 1fr);
        gap: 12px;
    }
    .cat-circle-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
    .cat-circle-name {
        font-size: 11px;
    }
}

/* ---------- Category Layout Mobile ---------- */
@media (max-width: 880px) {
    .cat-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .cat-sidebar {
        position: static;
        max-height: none;
    }
    .cat-tree {
        max-height: 40vh;
    }
}

/* ---------- CTA Section Mobile ---------- */
@media (max-width: 640px) {
    .cta-card {
        padding: 24px 20px;
        border-radius: 12px;
    }
    .cta-card h2 {
        font-size: 20px;
    }
    .cta-list {
        grid-template-columns: 1fr;
        gap: 4px;
    }
    .cta-actions {
        flex-direction: column;
    }
    .cta-actions .btn-hero,
    .cta-actions .btn-hero-ghost-dark {
        text-align: center;
    }
}

/* ---------- Announce Section Mobile ---------- */
@media (max-width: 640px) {
    .announce-card {
        padding: 20px 16px;
        border-radius: 12px;
    }
    .announce-left h2 {
        font-size: 20px;
    }
    .announce-actions {
        flex-direction: column;
    }
    .announce-actions .btn-hero,
    .announce-actions .btn-hero-ghost-dark {
        text-align: center;
    }
}

/* ---------- Pagination Mobile ---------- */
@media (max-width: 640px) {
    .pagination {
        gap: 8px;
        margin-top: 32px;
    }
    .page-btn {
        padding: 8px 12px;
        font-size: 13px;
    }
    .page-info {
        font-size: 13px;
    }
}

/* ---------- Touch Targets ---------- */
@media (max-width: 768px) {
    .btn, .btn-hero, .btn-hero-ghost, .btn-hero-ghost-dark,
    .share-btn, .page-btn, .cat-tree-item, .bottom-nav-item,
    .nav-admin-toggle, .mobile-nav-close {
        min-height: 44px;
        min-width: 44px;
    }
    .share-btn {
        min-height: 40px;
        min-width: 40px;
    }
}

/* ---------- Smooth Scrolling ---------- */
html {
    scroll-behavior: smooth;
}

/* ---------- Focus States for Accessibility ---------- */
@media (max-width: 768px) {
    *:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }
    .btn:focus-visible,
    .share-btn:focus-visible,
    .bottom-nav-item:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 2px;
    }
}

/* ---------- Loading States ---------- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .post-card {
        animation: slideUp 0.3s ease-out;
    }
}

/* ---------- Safe Area for Notched Devices ---------- */
@supports (padding: max(0px)) {
    @media (max-width: 768px) {
        .bottom-nav {
            padding-bottom: max(8px, env(safe-area-inset-bottom));
        }
        .container {
            padding-left: max(16px, env(safe-area-inset-left));
            padding-right: max(16px, env(safe-area-inset-right));
        }
    }
}

/* ---------- Print Styles ---------- */
@media print {
    .site-header, .bottom-nav, .site-footer,
    .hero-actions, .share, .pagination {
        display: none !important;
    }
    .post-container {
        max-width: 100%;
    }
    .prose {
        font-size: 12pt;
    }
}

/* ---------- Mobile Global Fixes ---------- */
@media (max-width: 768px) {
    html, body {
        overflow-x: hidden;
        max-width: 100vw;
    }
    .container {
        padding-inline: 16px;
    }
    img {
        max-width: 100%;
        height: auto;
    }
    .cat-popular-list {
        grid-template-columns: 1fr;
    }
    .cat-popular-thumb {
        height: 160px;
    }
}