/* ═══════════════════════════════════════════════
   BATT INSIGHTS — Shared Stylesheet
   All pages except index.html (which has inline CSS)
   ═══════════════════════════════════════════════ */

:root {
    --slate-950: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;
    --ivory: #faf9f6;
    --warm-white: #fefdfb;
    --accent-teal: #0d9488;
    --accent-teal-dark: #0f766e;
    --accent-teal-light: #ccfbf1;
    --accent-amber: #d97706;
    --serif: 'Newsreader', 'Georgia', serif;
    --sans: 'Libre Franklin', 'Helvetica Neue', sans-serif;
    --max-w: 1200px;
    --nav-h: 72px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--sans);
    color: var(--slate-800);
    background: var(--warm-white);
    line-height: 1.6;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

/* ═══════════════ NAVIGATION ═══════════════ */
nav {
    position: fixed; top: 0; width: 100%; height: var(--nav-h);
    background: rgba(254, 253, 251, 0.92);
    backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200); z-index: 1000;
    transition: box-shadow 0.3s ease;
}
nav.scrolled { box-shadow: 0 1px 20px rgba(15, 23, 42, 0.06); }

.nav-inner {
    max-width: var(--max-w); margin: 0 auto; padding: 0 2rem;
    height: 100%; display: flex; align-items: center; justify-content: space-between;
}

.logo {
    font-family: var(--serif); font-size: 1.35rem; font-weight: 700;
    color: var(--slate-950); text-decoration: none; letter-spacing: -0.02em;
    display: flex; align-items: center; gap: 0.5rem;
}

.logo-mark {
    width: 28px; height: 28px; background: var(--accent-teal); border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 0.85rem; font-weight: 700; font-family: var(--sans);
}

.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; }

.nav-links a {
    text-decoration: none; color: var(--slate-600); font-size: 0.875rem;
    font-weight: 500; letter-spacing: 0.01em; transition: color 0.2s; position: relative;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 0;
    width: 0; height: 1.5px; background: var(--accent-teal); transition: width 0.3s ease;
}
.nav-links a:hover { color: var(--slate-950); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
    background: var(--slate-950) !important; color: white !important;
    padding: 0.5rem 1.25rem; border-radius: 6px;
    font-size: 0.825rem !important; font-weight: 600 !important;
    transition: background 0.2s, transform 0.2s !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--slate-700) !important; transform: translateY(-1px); }

.hamburger {
    display: none; flex-direction: column; gap: 5px;
    cursor: pointer; background: none; border: none; padding: 4px;
}
.hamburger span { width: 22px; height: 2px; background: var(--slate-800); transition: all 0.3s; border-radius: 1px; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ═══════════════ BUTTONS ═══════════════ */
.btn-primary {
    background: var(--accent-teal); color: white; padding: 0.8rem 1.75rem;
    border-radius: 6px; text-decoration: none; font-weight: 600; font-size: 0.9rem;
    transition: all 0.2s; display: inline-flex; align-items: center; gap: 0.5rem;
    border: none; cursor: pointer; font-family: var(--sans);
}
.btn-primary:hover { background: var(--accent-teal-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25); }

.btn-secondary {
    color: var(--slate-700); padding: 0.8rem 1.75rem; border-radius: 6px;
    text-decoration: none; font-weight: 500; font-size: 0.9rem;
    border: 1.5px solid var(--slate-300); transition: all 0.2s;
}
.btn-secondary:hover { border-color: var(--slate-400); color: var(--slate-950); }

/* ═══════════════ SECTIONS ═══════════════ */
section { padding: 5rem 2rem; }
.section-inner { max-width: var(--max-w); margin: 0 auto; }
.section-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--accent-teal); font-weight: 600; margin-bottom: 0.75rem; }
.section-title { font-family: var(--serif); font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 700; color: var(--slate-950); letter-spacing: -0.02em; margin-bottom: 1rem; line-height: 1.2; }
.section-subtitle { font-size: 1.05rem; color: var(--slate-500); max-width: 600px; line-height: 1.65; font-weight: 300; }
.section-header { margin-bottom: 3.5rem; }

/* ═══════════════ PAGE HEADER ═══════════════ */
.page-header {
    padding: calc(var(--nav-h) + 4rem) 2rem 3rem;
    border-bottom: 1px solid var(--slate-200);
}
.page-title {
    font-family: var(--serif); font-size: clamp(2.25rem, 4.5vw, 3.25rem);
    font-weight: 700; color: var(--slate-950); letter-spacing: -0.025em;
    line-height: 1.15; margin-bottom: 0.75rem;
}

/* ═══════════════ RESEARCH CARDS ═══════════════ */
.research-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

.research-card {
    background: white; border: 1px solid var(--slate-200); border-radius: 10px;
    overflow: hidden; transition: all 0.3s ease; text-decoration: none;
    color: inherit; display: block;
}
.research-card:hover { box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08); transform: translateY(-3px); border-color: var(--slate-300); }

.research-thumb {
    height: 180px; background: linear-gradient(135deg, var(--slate-100), var(--slate-200));
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.research-thumb::before {
    content: ''; position: absolute; width: 120%; height: 120%;
    background: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(13, 148, 136, 0.03) 10px, rgba(13, 148, 136, 0.03) 20px);
}
.research-thumb .doc-icon { font-size: 1rem; opacity: 0.35; position: relative; z-index: 1; font-weight: 700; color: var(--slate-500); letter-spacing: 0.05em; }

.research-body { padding: 1.5rem; }

.research-tag {
    display: inline-block; font-size: 0.68rem; text-transform: uppercase;
    letter-spacing: 0.08em; color: var(--accent-teal); font-weight: 600;
    background: var(--accent-teal-light); padding: 0.25rem 0.65rem;
    border-radius: 4px; margin-bottom: 0.75rem;
}

.research-card h3 { font-family: var(--serif); font-size: 1.1rem; font-weight: 600; color: var(--slate-950); margin-bottom: 0.5rem; line-height: 1.35; }
.research-card p { font-size: 0.85rem; color: var(--slate-500); line-height: 1.55; margin-bottom: 1rem; }

.research-meta { font-size: 0.75rem; color: var(--slate-400); display: flex; align-items: center; justify-content: space-between; }

.pdf-link { color: var(--accent-teal); font-weight: 600; text-decoration: none; font-size: 0.8rem; display: flex; align-items: center; gap: 0.3rem; }
.pdf-link:hover { text-decoration: underline; }

/* ═══════════════ FILTERS ═══════════════ */
.filters-section { padding: 2rem 2rem 0; }

.filter-bar { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.filter-btn {
    padding: 0.5rem 1.15rem; border-radius: 100px; border: 1.5px solid var(--slate-200);
    background: white; color: var(--slate-600); font-family: var(--sans);
    font-size: 0.8rem; font-weight: 500; cursor: pointer; transition: all 0.2s;
}
.filter-btn:hover { border-color: var(--accent-teal); color: var(--accent-teal); }
.filter-btn.active { background: var(--accent-teal); color: white; border-color: var(--accent-teal); }

/* ═══════════════ RESEARCH PAGE GRID ═══════════════ */
.research-page-grid { padding-top: 2.5rem; }

/* ═══════════════ BLOG LIST ═══════════════ */
.blog-list { display: flex; flex-direction: column; gap: 2rem; }

.blog-item {
    display: grid; grid-template-columns: 280px 1fr; gap: 2rem;
    text-decoration: none; color: inherit; padding: 1.5rem;
    border: 1px solid var(--slate-200); border-radius: 10px;
    background: white; transition: all 0.3s ease;
}
.blog-item:hover { box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08); transform: translateY(-2px); }

.blog-item-img { border-radius: 8px; min-height: 180px; }

.blog-item-content { display: flex; flex-direction: column; justify-content: center; }
.blog-item-content .research-tag { align-self: flex-start; margin-bottom: 0.5rem; }
.blog-item-content h2 { font-family: var(--serif); font-size: 1.25rem; font-weight: 600; color: var(--slate-950); margin-bottom: 0.5rem; line-height: 1.3; }
.blog-item-content p { font-size: 0.9rem; color: var(--slate-500); line-height: 1.6; margin-bottom: 0.75rem; }

/* ═══════════════ BLOG POST ═══════════════ */
.post-header {
    padding: calc(var(--nav-h) + 4rem) 2rem 3rem;
    border-bottom: 1px solid var(--slate-200);
}
.post-header-inner { max-width: 760px; margin: 0 auto; }

.back-link {
    display: inline-block; font-size: 0.85rem; color: var(--accent-teal);
    text-decoration: none; margin-bottom: 1.5rem; font-weight: 500;
}
.back-link:hover { text-decoration: underline; }

.post-header h1 {
    font-family: var(--serif); font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700; color: var(--slate-950); line-height: 1.2;
    margin-bottom: 1rem; letter-spacing: -0.02em;
}

.post-meta {
    display: flex; gap: 0.5rem; align-items: center;
    font-size: 0.85rem; color: var(--slate-400);
}

.post-body {
    max-width: 760px; margin: 0 auto; padding: 3rem 2rem 4rem;
}
.post-body p { font-size: 1.05rem; line-height: 1.8; color: var(--slate-700); margin-bottom: 1.5rem; font-weight: 300; }
.post-body .post-lead { font-size: 1.2rem; line-height: 1.75; color: var(--slate-600); font-weight: 400; font-style: italic; margin-bottom: 2rem; }
.post-body h2 { font-family: var(--serif); font-size: 1.5rem; font-weight: 700; color: var(--slate-950); margin: 2.5rem 0 1rem; }
.post-body strong { font-weight: 500; color: var(--slate-800); }

.post-body blockquote {
    border-left: 3px solid var(--accent-teal); padding: 1.25rem 1.5rem;
    margin: 2rem 0; background: var(--slate-50); border-radius: 0 8px 8px 0;
}
.post-body blockquote p { font-family: var(--serif); font-size: 1.15rem; font-style: italic; color: var(--slate-700); margin-bottom: 0.5rem; }
.post-body blockquote cite { font-size: 0.85rem; color: var(--slate-400); font-style: normal; }

.post-embed {
    margin: 2.5rem 0; border-radius: 10px; overflow: hidden;
    border: 1px solid var(--slate-200);
}

.embed-placeholder {
    padding: 3rem 2rem; background: var(--slate-50);
    text-align: center;
}
.embed-placeholder p { font-weight: 500; color: var(--slate-600); margin-bottom: 0.25rem; font-size: 0.95rem; }
.embed-placeholder span { font-size: 0.78rem; color: var(--slate-400); }

.post-download {
    margin: 2.5rem 0; padding: 1.5rem 2rem; background: var(--accent-teal-light);
    border-radius: 10px; border: 1px solid rgba(13, 148, 136, 0.15);
}
.post-download-inner { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; }
.post-download strong { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent-teal-dark); }
.post-download p { font-family: var(--serif); font-size: 1rem; color: var(--slate-800); margin-bottom: 0; }

/* Author Bio */
.author-bio { border-top: 1px solid var(--slate-200); padding: 0 2rem; }
.author-bio-inner { max-width: 760px; margin: 0 auto; padding: 2.5rem 0; display: flex; gap: 1.5rem; align-items: center; }
.author-photo {
    width: 64px; height: 64px; border-radius: 50%; background: var(--slate-200);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; color: var(--slate-500); font-size: 0.85rem; flex-shrink: 0;
}
.author-info strong { display: block; color: var(--slate-950); margin-bottom: 0.25rem; }
.author-info p { font-size: 0.85rem; color: var(--slate-500); line-height: 1.5; margin-bottom: 0.5rem; }
.author-links { display: flex; gap: 1rem; }
.author-links a { font-size: 0.8rem; color: var(--accent-teal); text-decoration: none; font-weight: 500; }
.author-links a:hover { text-decoration: underline; }

/* ═══════════════ ABOUT PAGE ═══════════════ */
.about-full-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 4rem; align-items: start; }

.about-photo-large {
    aspect-ratio: 3/4; background: linear-gradient(160deg, var(--slate-200), var(--slate-300));
    border-radius: 10px; display: flex; align-items: center; justify-content: center;
    color: var(--slate-400); font-size: 0.85rem; font-weight: 500;
    position: sticky; top: calc(var(--nav-h) + 2rem);
}

.about-bio .bio-lead { font-size: 1.2rem; line-height: 1.75; color: var(--slate-700); margin-bottom: 1.5rem; font-weight: 400; }
.about-bio p { font-size: 1rem; line-height: 1.75; color: var(--slate-600); margin-bottom: 1rem; font-weight: 300; }

.approach-section { background: var(--ivory); }
.approach-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.approach-item { padding: 2rem; border-radius: 10px; background: white; border: 1px solid var(--slate-200); }
.approach-item h3 { font-family: var(--serif); font-size: 1.1rem; font-weight: 600; color: var(--slate-950); margin-bottom: 0.65rem; }
.approach-item p { font-size: 0.9rem; color: var(--slate-500); line-height: 1.6; }

/* Timeline */
.timeline { max-width: 700px; }
.timeline-item { display: grid; grid-template-columns: 80px 1fr; gap: 2rem; padding-bottom: 2.5rem; position: relative; }
.timeline-item:not(:last-child)::after {
    content: ''; position: absolute; left: 90px; top: 2rem; bottom: 0;
    width: 1px; background: var(--slate-200);
}
.timeline-year { font-family: var(--serif); font-size: 1.1rem; font-weight: 700; color: var(--accent-teal); padding-top: 0.15rem; }
.timeline-content h3 { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; color: var(--slate-950); margin-bottom: 0.35rem; }
.timeline-content p { font-size: 0.9rem; color: var(--slate-500); line-height: 1.55; }

/* Education */
.edu-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.edu-item { padding: 1.5rem; border: 1px solid var(--slate-200); border-radius: 10px; background: white; }
.edu-item h3 { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; color: var(--slate-950); margin-bottom: 0.25rem; }
.edu-item p { font-size: 0.85rem; color: var(--slate-500); }

/* ═══════════════ SERVICES PAGE ═══════════════ */
.service-detail-grid { display: flex; flex-direction: column; gap: 3rem; }

.service-detail { border-radius: 12px; overflow: hidden; border: 1px solid var(--slate-200); background: white; }

.service-detail-header {
    padding: 2.5rem; color: white; position: relative;
}
.service-detail-num { font-family: var(--serif); font-size: 3rem; font-weight: 700; opacity: 0.25; line-height: 1; margin-bottom: 0.5rem; }
.service-detail-header h2 { font-family: var(--serif); font-size: 1.5rem; font-weight: 700; }

.service-detail-body { padding: 2rem 2.5rem 2.5rem; }
.service-detail-body p { font-size: 1rem; color: var(--slate-600); line-height: 1.7; margin-bottom: 1.5rem; font-weight: 300; }

.service-features { list-style: none; margin-bottom: 2rem; }
.service-features li {
    padding: 0.6rem 0; border-bottom: 1px solid var(--slate-100);
    font-size: 0.9rem; color: var(--slate-700); padding-left: 1.25rem;
    position: relative;
}
.service-features li::before {
    content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
    width: 6px; height: 6px; border-radius: 50%; background: var(--accent-teal);
}

/* Testimonials */
.testimonial-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.testimonial { padding: 2rem; background: white; border: 1px solid var(--slate-200); border-radius: 10px; }
.testimonial p { font-family: var(--serif); font-size: 1.05rem; font-style: italic; color: var(--slate-700); line-height: 1.65; margin-bottom: 1.25rem; }
.testimonial-author strong { display: block; color: var(--slate-950); font-size: 0.9rem; }
.testimonial-author span { font-size: 0.8rem; color: var(--slate-400); }

/* ═══════════════ CONTACT PAGE ═══════════════ */
.contact-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 3rem; }

.contact-form { display: flex; flex-direction: column; gap: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.8rem; font-weight: 600; color: var(--slate-700); text-transform: uppercase; letter-spacing: 0.05em; }

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.85rem 1rem; border: 1.5px solid var(--slate-200); border-radius: 8px;
    font-family: var(--sans); font-size: 0.9rem; color: var(--slate-800);
    background: white; outline: none; transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent-teal); }

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--slate-400); }

.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }

.contact-info-card { padding: 1.75rem; border: 1px solid var(--slate-200); border-radius: 10px; background: white; }
.contact-info-card h3 { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; color: var(--slate-950); margin-bottom: 1rem; }
.contact-info-card p { font-size: 0.9rem; color: var(--slate-500); line-height: 1.6; }

.contact-detail { margin-bottom: 1rem; }
.contact-detail:last-child { margin-bottom: 0; }
.contact-detail strong { display: block; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--slate-400); font-weight: 600; margin-bottom: 0.2rem; }
.contact-detail a { color: var(--accent-teal); text-decoration: none; font-size: 0.9rem; }
.contact-detail a:hover { text-decoration: underline; }

/* ═══════════════ NEWSLETTER ═══════════════ */
.newsletter { background: var(--slate-950); padding: 4rem 2rem; }
.newsletter-inner { max-width: 640px; margin: 0 auto; text-align: center; }
.newsletter h2 { font-family: var(--serif); font-size: 1.75rem; font-weight: 700; color: white; margin-bottom: 0.65rem; }
.newsletter p { color: var(--slate-400); margin-bottom: 1.75rem; font-size: 0.95rem; font-weight: 300; }

.newsletter-form { display: flex; gap: 0.75rem; max-width: 460px; margin: 0 auto; }
.newsletter-form input {
    flex: 1; padding: 0.8rem 1.15rem; border: 1px solid var(--slate-700);
    border-radius: 6px; background: var(--slate-800); color: white;
    font-family: var(--sans); font-size: 0.875rem; outline: none; transition: border-color 0.2s;
}
.newsletter-form input::placeholder { color: var(--slate-400); }
.newsletter-form input:focus { border-color: var(--accent-teal); }
.newsletter-form button {
    background: var(--accent-teal); color: white; border: none;
    padding: 0.8rem 1.5rem; border-radius: 6px; font-family: var(--sans);
    font-weight: 600; font-size: 0.875rem; cursor: pointer; transition: background 0.2s; white-space: nowrap;
}
.newsletter-form button:hover { background: var(--accent-teal-dark); }

/* ═══════════════ FOOTER ═══════════════ */
footer { background: var(--slate-950); border-top: 1px solid var(--slate-800); padding: 3rem 2rem 2rem; }

.footer-inner {
    max-width: var(--max-w); margin: 0 auto;
    display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem;
}

.footer-brand .logo { color: white; margin-bottom: 1rem; }
.footer-brand p { font-size: 0.85rem; color: var(--slate-400); line-height: 1.6; font-weight: 300; }

.footer-col h4 { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--slate-400); margin-bottom: 1rem; font-weight: 600; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.6rem; }
.footer-col a { color: var(--slate-300); text-decoration: none; font-size: 0.85rem; transition: color 0.2s; font-weight: 300; }
.footer-col a:hover { color: white; }

.footer-bottom {
    max-width: var(--max-w); margin: 2rem auto 0; padding-top: 1.5rem;
    border-top: 1px solid var(--slate-800); display: flex;
    justify-content: space-between; align-items: center; font-size: 0.78rem; color: var(--slate-500);
}

.social-links { display: flex; gap: 1.25rem; }
.social-links a { color: var(--slate-400); text-decoration: none; transition: color 0.2s; font-size: 0.85rem; }
.social-links a:hover { color: white; }

/* ═══════════════ ANIMATIONS ═══════════════ */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.stagger-1 { transition-delay: 0.05s; }
.stagger-2 { transition-delay: 0.1s; }
.stagger-3 { transition-delay: 0.15s; }
.stagger-4 { transition-delay: 0.2s; }

/* ═══════════════ RESPONSIVE ═══════════════ */
@media (max-width: 1024px) {
    .research-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: repeat(2, 1fr); }
    .approach-grid { grid-template-columns: repeat(2, 1fr); }
    .testimonial-grid { grid-template-columns: 1fr; }
    .service-detail-body { padding: 1.5rem; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.active {
        display: flex; flex-direction: column; position: absolute;
        top: var(--nav-h); left: 0; right: 0; background: var(--warm-white);
        padding: 1.5rem 2rem; border-bottom: 1px solid var(--slate-200);
        box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
    }
    .hamburger { display: flex; }

    section { padding: 3.5rem 1.25rem; }
    .page-header { padding-top: calc(var(--nav-h) + 2.5rem); }
    .post-header { padding-top: calc(var(--nav-h) + 2.5rem); }

    .research-grid { grid-template-columns: 1fr; }
    .blog-item { grid-template-columns: 1fr; }
    .blog-item-img { min-height: 160px; }
    .about-full-grid { grid-template-columns: 1fr; }
    .about-photo-large { position: static; aspect-ratio: 16/9; }
    .approach-grid { grid-template-columns: 1fr; }
    .edu-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
    .newsletter-form { flex-direction: column; }
    .post-download-inner { flex-direction: column; text-align: center; }
    .author-bio-inner { flex-direction: column; text-align: center; }
    .filter-bar { gap: 0.4rem; }
    .filter-btn { font-size: 0.75rem; padding: 0.4rem 0.9rem; }
}