/*
Theme Name: RDP Theme
Theme URI: https://rdp.in/blog
Author: RDP Technologies Limited
Author URI: https://rdp.in
Description: Custom WordPress theme for RDP Technologies blog and case studies. Matches the rdp.in static site design with RDP brand tokens.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.9
Requires PHP: 8.0
License: Proprietary
License URI: https://rdp.in
Text Domain: rdp-theme
Tags: blog, custom-logo, custom-menu, featured-images, threaded-comments
*/

/* ==========================================================================
   RDP Design Tokens
   ========================================================================== */
:root {
    /* Brand Colors */
    --rdp-red: #d82228;
    --rdp-black: #000000;
    --rdp-white: #ffffff;
    --rdp-bg: #ffffff;
    --rdp-surface: #f6f6f6;
    --rdp-border: #e2e2e2;

    /* Text Colors */
    --rdp-text: #111111;
    --rdp-text-2: #3a3a3a;
    --rdp-text-3: #6a6a6a;

    /* Links */
    --rdp-link: var(--rdp-red);
    --rdp-link-hover: #b91c1c;

    /* Typography */
    --font-heading: "Montserrat", "Helvetica Neue", Arial, sans-serif;
    --font-body: "Open Sans", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
    --fs-h1: 48px; --fs-h2: 36px; --fs-h3: 28px; --fs-h4: 22px;
    --fs-lead: 18px; --fs-body: 16px; --fs-small: 14px; --fs-micro: 12px;
    --lh-tight: 1.1; --lh-snug: 1.25; --lh-base: 1.55;
    --fw-regular: 400; --fw-medium: 500; --fw-semibold: 600; --fw-bold: 700;

    /* Spacing (8px base) */
    --sp-1: 4px; --sp-2: 8px; --sp-3: 12px; --sp-4: 16px;
    --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 64px;

    /* Borders & Radius */
    --radius-sm: 10px; --radius-md: 14px; --radius-lg: 18px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
    --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 10px 30px rgba(0,0,0,.10);

    /* Focus */
    --focus-ring: 0 0 0 3px rgba(216,34,40,.28);
}

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

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

body {
    font-family: var(--font-body);
    font-size: var(--fs-body);
    line-height: var(--lh-base);
    color: var(--rdp-text-2);
    background: var(--rdp-surface);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--rdp-link); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--rdp-link-hover); }
a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 4px; }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--rdp-text);
    line-height: var(--lh-snug);
    font-weight: var(--fw-bold);
}
h1 { font-size: var(--fs-h1); font-weight: 800; line-height: var(--lh-tight); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }

p { margin-bottom: 1em; }
ul, ol { padding-left: 1.5em; margin-bottom: 1em; }

/* ==========================================================================
   Eyebrow Bar
   ========================================================================== */
.rdp-eyebrow {
    background: var(--rdp-black);
    padding: var(--sp-3) 0;
    font-size: var(--fs-micro);
    color: rgba(255,255,255,0.70);
}
.rdp-eyebrow .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.rdp-eyebrow a {
    color: rgba(255,255,255,0.75);
    font-weight: var(--fw-medium);
    transition: color 0.15s;
}
.rdp-eyebrow a:hover { color: #fff; }
.rdp-eyebrow .eyebrow-links { display: flex; gap: var(--sp-5); }

/* ==========================================================================
   Site Header
   ========================================================================== */
.site-header {
    background: var(--rdp-white);
    border-bottom: 1px solid var(--rdp-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-4) var(--sp-6);
    max-width: 1280px;
    margin: 0 auto;
}
.site-logo img {
    height: 36px;
    width: auto;
}

/* Main Navigation */
.main-nav { display: flex; align-items: center; gap: var(--sp-5); }
.main-nav a {
    font-family: var(--font-heading);
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    color: var(--rdp-text);
    padding: var(--sp-2) var(--sp-1);
    transition: color 0.15s;
}
.main-nav a:hover { color: var(--rdp-red); }
.main-nav a.active { color: var(--rdp-red); }

.nav-cta {
    display: inline-flex;
    align-items: center;
    background: var(--rdp-red);
    color: var(--rdp-white) !important;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    transition: background 0.2s, transform 0.2s;
}
.nav-cta:hover {
    background: var(--rdp-link-hover);
    color: var(--rdp-white) !important;
    transform: translateY(-1px);
}

/* Blog sub-nav */
.blog-subnav {
    background: var(--rdp-white);
    border-bottom: 1px solid var(--rdp-border);
    padding: var(--sp-3) 0;
}
.blog-subnav .container {
    display: flex;
    align-items: center;
    gap: var(--sp-5);
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}
.blog-subnav a {
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    color: var(--rdp-text-3);
    padding: var(--sp-2) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
}
.blog-subnav a:hover,
.blog-subnav a.active {
    color: var(--rdp-red);
    border-bottom-color: var(--rdp-red);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--sp-2);
}
.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--rdp-text);
    margin: 5px 0;
    transition: all 0.3s;
}

/* ==========================================================================
   Container
   ========================================================================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}
.container-narrow {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

/* ==========================================================================
   Blog Layout
   ========================================================================== */
.blog-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: var(--sp-7);
    padding: var(--sp-7) 0;
}
.blog-main { min-width: 0; }

/* ==========================================================================
   Section Overline
   ========================================================================== */
.section-overline {
    font-family: var(--font-heading);
    font-size: var(--fs-micro);
    font-weight: var(--fw-bold);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--rdp-red);
    margin-bottom: var(--sp-2);
}

/* ==========================================================================
   Post Cards
   ========================================================================== */
.post-card {
    background: var(--rdp-white);
    border: 1px solid var(--rdp-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.25s;
}
.post-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: rgba(216,34,40,0.30);
}
.post-card__image {
    aspect-ratio: 16/9;
    overflow: hidden;
}
.post-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}
.post-card:hover .post-card__image img {
    transform: scale(1.03);
}
.post-card__content {
    padding: var(--sp-5);
}
.post-card__meta {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    font-size: var(--fs-micro);
    color: var(--rdp-text-3);
    margin-bottom: var(--sp-3);
}
.post-card__category {
    background: rgba(216,34,40,0.10);
    color: var(--rdp-red);
    padding: 2px 10px;
    border-radius: 20px;
    font-weight: var(--fw-semibold);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.post-card__title {
    font-size: var(--fs-h4);
    margin-bottom: var(--sp-3);
    line-height: var(--lh-snug);
}
.post-card__title a { color: var(--rdp-text); }
.post-card__title a:hover { color: var(--rdp-red); }
.post-card__excerpt {
    font-size: var(--fs-small);
    color: var(--rdp-text-2);
    line-height: var(--lh-base);
    margin-bottom: var(--sp-4);
}
.post-card__readmore {
    font-family: var(--font-heading);
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    color: var(--rdp-red);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.post-card__readmore::after { content: '\2192'; transition: transform 0.2s; }
.post-card:hover .post-card__readmore::after { transform: translateX(4px); }

/* Post grid */
.post-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--sp-5);
}

/* Featured post */
.post-card--featured {
    grid-column: 1 / -1;
}
.post-card--featured .post-card__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
}
.post-card--featured .post-card__image { aspect-ratio: auto; min-height: 300px; }
.post-card--featured .post-card__content { padding: var(--sp-6); display: flex; flex-direction: column; justify-content: center; }
.post-card--featured .post-card__title { font-size: var(--fs-h3); }

/* ==========================================================================
   Single Post
   ========================================================================== */
.single-post-header {
    background: linear-gradient(180deg, #000 0%, #1a1a1a 100%);
    color: var(--rdp-white);
    padding: var(--sp-8) 0;
    position: relative;
    overflow: hidden;
}
.single-post-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(216,34,40,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(216,34,40,0.08) 0%, transparent 50%);
    pointer-events: none;
}
.single-post-header .container { position: relative; z-index: 1; }
.single-post-header h1 {
    color: var(--rdp-white);
    font-size: 40px;
    max-width: 800px;
    margin-bottom: var(--sp-4);
}
.single-post-header .post-meta {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    color: rgba(255,255,255,0.70);
    font-size: var(--fs-small);
}
.single-post-header .post-meta .category-badge {
    background: var(--rdp-red);
    color: #fff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: var(--fs-micro);
    font-weight: var(--fw-semibold);
}

.single-post-content {
    background: var(--rdp-white);
    border-radius: var(--radius-lg);
    padding: var(--sp-7);
    margin-top: calc(-1 * var(--sp-6));
    position: relative;
    z-index: 2;
}

/* Article Typography */
.entry-content h2 { margin: var(--sp-7) 0 var(--sp-4); font-size: var(--fs-h3); }
.entry-content h3 { margin: var(--sp-6) 0 var(--sp-3); font-size: var(--fs-h4); }
.entry-content p { margin-bottom: var(--sp-4); line-height: 1.7; color: var(--rdp-text-2); }
.entry-content ul, .entry-content ol { margin-bottom: var(--sp-4); padding-left: var(--sp-5); }
.entry-content li { margin-bottom: var(--sp-2); line-height: 1.7; }
.entry-content blockquote {
    border-left: 4px solid var(--rdp-red);
    padding: var(--sp-4) var(--sp-5);
    margin: var(--sp-5) 0;
    background: var(--rdp-surface);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--rdp-text);
}
.entry-content img {
    border-radius: var(--radius-md);
    margin: var(--sp-5) 0;
}
.entry-content pre {
    background: #1a1a1a;
    color: #e0e0e0;
    padding: var(--sp-5);
    border-radius: var(--radius-md);
    overflow-x: auto;
    font-size: var(--fs-small);
    margin: var(--sp-5) 0;
}
.entry-content code {
    background: var(--rdp-surface);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}
.entry-content pre code { background: none; padding: 0; }
.entry-content a { text-decoration: underline; text-underline-offset: 2px; }
.entry-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--sp-5) 0;
}
.entry-content th, .entry-content td {
    padding: var(--sp-3) var(--sp-4);
    border: 1px solid var(--rdp-border);
    text-align: left;
}
.entry-content th {
    background: var(--rdp-surface);
    font-weight: var(--fw-semibold);
}

/* ==========================================================================
   Sidebar
   ========================================================================== */
.blog-sidebar { display: flex; flex-direction: column; gap: var(--sp-5); }

.sidebar-widget {
    background: var(--rdp-white);
    border: 1px solid var(--rdp-border);
    border-radius: var(--radius-lg);
    padding: var(--sp-5);
}
.sidebar-widget__title {
    font-family: var(--font-heading);
    font-size: var(--fs-body);
    font-weight: var(--fw-bold);
    margin-bottom: var(--sp-4);
    padding-bottom: var(--sp-3);
    border-bottom: 2px solid var(--rdp-red);
}
.sidebar-widget ul { list-style: none; padding: 0; margin: 0; }
.sidebar-widget li {
    padding: var(--sp-2) 0;
    border-bottom: 1px solid var(--rdp-surface);
}
.sidebar-widget li:last-child { border-bottom: none; }
.sidebar-widget li a {
    font-size: var(--fs-small);
    color: var(--rdp-text-2);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.sidebar-widget li a:hover { color: var(--rdp-red); }
.sidebar-widget .post-count {
    font-size: var(--fs-micro);
    color: var(--rdp-text-3);
    background: var(--rdp-surface);
    padding: 2px 8px;
    border-radius: 10px;
}

/* Search widget */
.search-form {
    display: flex;
    gap: var(--sp-2);
}
.search-form input[type="search"] {
    flex: 1;
    padding: 10px var(--sp-4);
    border: 1px solid var(--rdp-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: var(--fs-small);
    transition: border-color 0.2s;
}
.search-form input[type="search"]:focus {
    outline: none;
    border-color: var(--rdp-red);
    box-shadow: var(--focus-ring);
}
.search-form button {
    background: var(--rdp-red);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: var(--fw-semibold);
    transition: background 0.2s;
}
.search-form button:hover { background: var(--rdp-link-hover); }

/* CTA Widget */
.sidebar-cta {
    background: linear-gradient(135deg, var(--rdp-red) 0%, #b82620 100%);
    color: #fff;
    border: none;
    text-align: center;
}
.sidebar-cta .sidebar-widget__title {
    color: #fff;
    border-bottom-color: rgba(255,255,255,0.3);
}
.sidebar-cta p { color: rgba(255,255,255,0.85); font-size: var(--fs-small); }
.sidebar-cta .btn-white {
    display: inline-block;
    background: #fff;
    color: var(--rdp-red);
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-weight: var(--fw-semibold);
    font-family: var(--font-heading);
    margin-top: var(--sp-3);
    transition: all 0.2s;
}
.sidebar-cta .btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ==========================================================================
   Case Study Cards
   ========================================================================== */
.case-study-card {
    background: var(--rdp-white);
    border: 1px solid var(--rdp-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.25s;
}
.case-study-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: rgba(216,34,40,0.30);
}
.case-study-card__image { aspect-ratio: 16/10; overflow: hidden; }
.case-study-card__image img { width: 100%; height: 100%; object-fit: cover; }
.case-study-card__content { padding: var(--sp-5); }
.case-study-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
    margin-bottom: var(--sp-3);
}
.case-study-card__tag {
    font-size: 11px;
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 3px 10px;
    border-radius: 20px;
    background: var(--rdp-surface);
    color: var(--rdp-text-3);
}
.case-study-card__tag--industry { background: rgba(216,34,40,0.10); color: var(--rdp-red); }
.case-study-card__title { font-size: 20px; margin-bottom: var(--sp-2); }
.case-study-card__title a { color: var(--rdp-text); }
.case-study-card__title a:hover { color: var(--rdp-red); }
.case-study-card__excerpt { font-size: var(--fs-small); color: var(--rdp-text-2); margin-bottom: var(--sp-3); }
.case-study-card__stats {
    display: flex;
    gap: var(--sp-4);
    padding-top: var(--sp-3);
    border-top: 1px solid var(--rdp-border);
}
.case-study-card__stat {
    font-size: var(--fs-micro);
    color: var(--rdp-text-3);
}
.case-study-card__stat strong {
    display: block;
    font-size: var(--fs-body);
    color: var(--rdp-red);
    font-weight: var(--fw-bold);
}

/* ==========================================================================
   Pagination
   ========================================================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--sp-2);
    padding: var(--sp-7) 0;
}
.pagination a, .pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 42px;
    height: 42px;
    padding: 0 var(--sp-3);
    border: 1px solid var(--rdp-border);
    border-radius: var(--radius-sm);
    font-size: var(--fs-small);
    font-weight: var(--fw-medium);
    color: var(--rdp-text-2);
    background: var(--rdp-white);
    transition: all 0.2s;
}
.pagination a:hover {
    border-color: var(--rdp-red);
    color: var(--rdp-red);
}
.pagination .current {
    background: var(--rdp-red);
    color: #fff;
    border-color: var(--rdp-red);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background: var(--rdp-black);
    color: rgba(255,255,255,0.50);
    padding: var(--sp-8) 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--sp-7);
    padding-bottom: var(--sp-7);
}
.footer-brand img { height: 32px; margin-bottom: var(--sp-4); }
.footer-brand p {
    font-size: var(--fs-small);
    line-height: 1.7;
    color: rgba(255,255,255,0.50);
    max-width: 300px;
}
.footer-col h4 {
    color: #fff;
    font-size: var(--fs-small);
    font-weight: var(--fw-bold);
    margin-bottom: var(--sp-4);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: var(--sp-2); }
.footer-col a {
    color: rgba(255,255,255,0.70);
    font-size: var(--fs-small);
    transition: color 0.15s;
}
.footer-col a:hover { color: #fff; }

.footer-badges {
    display: flex;
    gap: var(--sp-4);
    margin-top: var(--sp-5);
    flex-wrap: wrap;
}
.footer-badge {
    font-size: var(--fs-micro);
    color: rgba(255,255,255,0.30);
    padding: var(--sp-2) var(--sp-3);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: var(--sp-5) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-bottom p {
    font-size: var(--fs-micro);
    color: rgba(255,255,255,0.20);
    margin: 0;
}
.footer-bottom a {
    color: rgba(255,255,255,0.25);
    font-size: var(--fs-micro);
}
.footer-bottom a:hover { color: rgba(255,255,255,0.50); }

/* ==========================================================================
   Breadcrumbs
   ========================================================================== */
.breadcrumbs {
    padding: var(--sp-4) 0;
    font-size: var(--fs-micro);
    color: var(--rdp-text-3);
}
.breadcrumbs a { color: var(--rdp-text-3); }
.breadcrumbs a:hover { color: var(--rdp-red); }
.breadcrumbs .sep { margin: 0 var(--sp-2); }

/* ==========================================================================
   Page Title Area
   ========================================================================== */
.page-title-area {
    background: var(--rdp-white);
    padding: var(--sp-7) 0;
    border-bottom: 1px solid var(--rdp-border);
}
.page-title-area h1 { font-size: var(--fs-h2); margin-bottom: var(--sp-2); }
.page-title-area p { color: var(--rdp-text-3); font-size: var(--fs-lead); margin: 0; }

/* ==========================================================================
   Author Box
   ========================================================================== */
.author-box {
    display: flex;
    gap: var(--sp-5);
    background: var(--rdp-surface);
    border-radius: var(--radius-lg);
    padding: var(--sp-5);
    margin: var(--sp-7) 0;
}
.author-box__avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}
.author-box__avatar img { width: 100%; height: 100%; object-fit: cover; }
.author-box__name {
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    font-size: var(--fs-body);
    margin-bottom: var(--sp-1);
}
.author-box__bio { font-size: var(--fs-small); color: var(--rdp-text-2); margin: 0; }

/* ==========================================================================
   Comments
   ========================================================================== */
.comments-area { margin-top: var(--sp-7); }
.comments-area h3 {
    font-size: var(--fs-h4);
    margin-bottom: var(--sp-5);
    padding-bottom: var(--sp-3);
    border-bottom: 2px solid var(--rdp-red);
}
.comment-list { list-style: none; padding: 0; }
.comment { padding: var(--sp-4) 0; border-bottom: 1px solid var(--rdp-border); }
.comment-meta { font-size: var(--fs-small); color: var(--rdp-text-3); margin-bottom: var(--sp-2); }
.comment-meta .fn { font-weight: var(--fw-semibold); color: var(--rdp-text); }
.comment-content p { font-size: var(--fs-small); }

.comment-respond label {
    display: block;
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    margin-bottom: var(--sp-1);
}
.comment-respond input[type="text"],
.comment-respond input[type="email"],
.comment-respond input[type="url"],
.comment-respond textarea {
    width: 100%;
    padding: 10px var(--sp-4);
    border: 1px solid var(--rdp-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: var(--fs-small);
    margin-bottom: var(--sp-4);
    transition: border-color 0.2s;
}
.comment-respond input:focus,
.comment-respond textarea:focus {
    outline: none;
    border-color: var(--rdp-red);
    box-shadow: var(--focus-ring);
}
.comment-respond .submit {
    background: var(--rdp-red);
    color: #fff;
    border: none;
    padding: 12px 32px;
    border-radius: var(--radius-sm);
    font-family: var(--font-heading);
    font-weight: var(--fw-semibold);
    cursor: pointer;
    transition: background 0.2s;
}
.comment-respond .submit:hover { background: var(--rdp-link-hover); }

/* ==========================================================================
   404 Page
   ========================================================================== */
.error-404 {
    text-align: center;
    padding: var(--sp-9) 0;
}
.error-404 h1 {
    font-size: 120px;
    color: var(--rdp-red);
    line-height: 1;
    margin-bottom: var(--sp-4);
}
.error-404 h2 { font-size: var(--fs-h3); margin-bottom: var(--sp-4); }
.error-404 p { color: var(--rdp-text-3); margin-bottom: var(--sp-5); }

/* ==========================================================================
   Skip Link (Accessibility)
   ========================================================================== */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--sp-4);
    background: var(--rdp-red);
    color: #fff;
    padding: var(--sp-3) var(--sp-5);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    font-family: var(--font-heading);
    font-size: var(--fs-small);
    font-weight: var(--fw-semibold);
    z-index: 9999;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 0;
    color: #fff;
    outline: none;
    box-shadow: var(--focus-ring);
}

/* ==========================================================================
   Mobile Navigation Panel
   ========================================================================== */
.main-nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--rdp-white);
    border-bottom: 2px solid var(--rdp-red);
    box-shadow: var(--shadow-md);
    padding: var(--sp-4) var(--sp-6);
    gap: 0;
    z-index: 999;
}
.main-nav.is-open a {
    display: block;
    padding: var(--sp-3) 0;
    font-size: var(--fs-body);
    border-bottom: 1px solid var(--rdp-border);
}
.main-nav.is-open a:last-child { border-bottom: none; }

/* Mobile CTA (visible when menu is open) */
.nav-cta--mobile {
    display: none;
    text-align: center;
    margin-top: var(--sp-3);
}
.main-nav.is-open + .nav-cta--mobile { display: block; }

/* Hamburger → X animation */
.mobile-menu-toggle.is-active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-toggle.is-active span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-toggle.is-active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==========================================================================
   Responsive — Tablet (max-width: 1023px)
   ========================================================================== */
@media (max-width: 1023px) {
    /* Layout */
    .blog-layout { grid-template-columns: 1fr; }
    .post-grid { grid-template-columns: repeat(2, 1fr); }
    .post-card--featured .post-card__inner { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .container { padding: 0 var(--sp-5); }  /* 24px at tablet */

    /* Navigation */
    .main-nav { display: none; }
    .mobile-menu-toggle { display: block; }
    .nav-cta.desktop-only { display: none; }
    .site-header .container { position: relative; }

    /* Eyebrow bar: single line centered */
    .rdp-eyebrow .container {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--sp-3);
    }
    .rdp-eyebrow .eyebrow-links { gap: var(--sp-4); }

    /* Blog sub-nav: horizontal scroll */
    .blog-subnav .container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        flex-wrap: nowrap;
        padding-bottom: var(--sp-2);
    }
    .blog-subnav .container::-webkit-scrollbar { display: none; }
    .blog-subnav a { white-space: nowrap; flex-shrink: 0; }

    /* Sidebar stacks below content */
    .blog-sidebar { order: 2; }

    /* Single post */
    .single-post-header h1 { font-size: 32px; }

    /* Case study stats wrap */
    .case-study-card__stats { flex-wrap: wrap; }

    /* Table horizontal scroll */
    .entry-content table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
}

/* ==========================================================================
   Responsive — Mobile (max-width: 767px)
   ========================================================================== */
@media (max-width: 767px) {
    :root {
        --fs-h1: 32px; --fs-h2: 28px; --fs-h3: 22px; --fs-h4: 20px;
    }

    /* Container padding: 16px on mobile */
    .container { padding: 0 var(--sp-4); }
    .container-narrow { padding: 0 var(--sp-4); }

    /* Grids to single column */
    .post-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: var(--sp-5); }

    /* Featured post: stacked */
    .post-card--featured .post-card__image { min-height: 200px; }
    .post-card--featured .post-card__content { padding: var(--sp-5); }
    .post-card--featured .post-card__title { font-size: var(--fs-h4); }

    /* Single post */
    .single-post-content { padding: var(--sp-5); margin-top: calc(-1 * var(--sp-4)); }
    .single-post-header { padding: var(--sp-6) 0; }
    .single-post-header h1 { font-size: 26px; }
    .single-post-header .post-meta { flex-wrap: wrap; gap: var(--sp-2); }

    /* Eyebrow bar: hide on mobile for clean look */
    .rdp-eyebrow { display: none; }

    /* Blog sub-nav */
    .blog-subnav .container { padding: 0 var(--sp-4); gap: var(--sp-4); }

    /* Footer */
    .footer-bottom { flex-direction: column; gap: var(--sp-3); text-align: center; }
    .footer-brand p { max-width: 100%; }
    .footer-badges { justify-content: center; }

    /* Author box: stack on mobile */
    .author-box { flex-direction: column; align-items: center; text-align: center; }
    .author-box__avatar { width: 80px; height: 80px; }

    /* Buttons full-width on mobile */
    .nav-cta,
    .sidebar-cta .btn-white,
    .comment-respond .submit,
    .search-form button {
        width: 100%;
        justify-content: center;
        text-align: center;
    }
    .search-form { flex-direction: column; }
    .search-form input[type="search"] { width: 100%; }

    /* Sidebar CTA full-width button */
    .sidebar-cta .btn-white { display: block; }

    /* Pagination: smaller on mobile */
    .pagination a, .pagination span {
        min-width: 38px;
        height: 38px;
        font-size: var(--fs-micro);
    }

    /* Mobile nav panel adjustments */
    .main-nav.is-open { padding: var(--sp-4); }

    /* 404 page */
    .error-404 h1 { font-size: 72px; }
    .error-404 { padding: var(--sp-7) 0; }

    /* Case study card stats */
    .case-study-card__stats { gap: var(--sp-3); }
    .case-study-card__stat { font-size: 11px; }
    .case-study-card__stat strong { font-size: var(--fs-small); }

    /* Post card content padding */
    .post-card__content { padding: var(--sp-4); }
    .post-card__title { font-size: 18px; }

    /* Entry content images */
    .entry-content img { border-radius: var(--radius-sm); }
    .entry-content pre { font-size: var(--fs-micro); padding: var(--sp-4); }
    .entry-content blockquote { padding: var(--sp-3) var(--sp-4); }

    /* Breadcrumbs */
    .breadcrumbs { font-size: 11px; }

    /* WordPress alignments: disable float on mobile */
    .alignleft, .alignright {
        float: none;
        margin: var(--sp-4) auto;
        display: block;
    }
}

/* ==========================================================================
   Touch Target Minimum (44px)
   ========================================================================== */
@media (pointer: coarse) {
    .main-nav a,
    .blog-subnav a,
    .sidebar-widget li a,
    .footer-col a,
    .pagination a,
    .pagination span,
    .breadcrumbs a,
    .post-card__readmore {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }
    .mobile-menu-toggle {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    html { scroll-behavior: auto; }
    .post-card:hover { transform: none; }
    .post-card:hover .post-card__image img { transform: none; }
    .case-study-card:hover { transform: none; }
    .nav-cta:hover { transform: none; }
    .sidebar-cta .btn-white:hover { transform: none; }
    .post-card:hover .post-card__readmore::after { transform: none; }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    body { background: #fff; color: #000; font-size: 12pt; }
    .rdp-eyebrow,
    .site-header,
    .blog-subnav,
    .mobile-menu-toggle,
    .blog-sidebar,
    .sidebar-cta,
    .pagination,
    .comment-respond,
    .search-form,
    .nav-cta,
    .skip-link { display: none !important; }

    .blog-layout { grid-template-columns: 1fr; }
    .single-post-content { box-shadow: none; border: none; margin-top: 0; }
    .single-post-header { background: #fff; color: #000; padding: var(--sp-4) 0; }
    .single-post-header h1 { color: #000; font-size: 24pt; }
    .single-post-header .post-meta { color: #333; }
    .single-post-header .post-meta .category-badge { background: #eee; color: #000; }
    .single-post-header::before { display: none; }

    .entry-content a { text-decoration: underline; color: #000; }
    .entry-content a::after { content: " (" attr(href) ")"; font-size: 0.8em; color: #666; }
    .entry-content pre { border: 1px solid #ccc; }
    .entry-content img { max-width: 4in; }

    .site-footer { background: #fff; color: #000; border-top: 2px solid #000; padding-top: var(--sp-4); }
    .footer-col a { color: #000; }
    .footer-col h4 { color: #000; }

    .post-card { break-inside: avoid; box-shadow: none; border: 1px solid #ccc; }
    .post-card:hover { transform: none; box-shadow: none; }
}

/* ==========================================================================
   WordPress Specific
   ========================================================================== */
.wp-block-image { margin: var(--sp-5) 0; }
.wp-block-image img { border-radius: var(--radius-md); }
.alignleft { float: left; margin-right: var(--sp-5); margin-bottom: var(--sp-4); }
.alignright { float: right; margin-left: var(--sp-5); margin-bottom: var(--sp-4); }
.aligncenter { display: block; margin: var(--sp-5) auto; }
.wp-caption { max-width: 100%; }
.wp-caption-text { font-size: var(--fs-micro); color: var(--rdp-text-3); margin-top: var(--sp-2); text-align: center; }
.screen-reader-text {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}