/*
Theme Name: Q Calculus
Theme URI: https://qcalculus.com
Author: Q Calculus
Description: Science-based beauty ingredient blog — Decoding Beauty Science
Version: 1.0.1
Text Domain: qcalculus
*/

/* ── RESET ─────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#FAFAF8;--bg-card:#FFFFFF;--bg-subtle:#F2F1EC;
  --text:#1A1A1A;--text-muted:#6B6B6B;
  --accent:#2D5A4F;--accent-lt:#3D7A6D;
  --gold:#B8935A;--border:#E5E4DE;
  --radius:6px;--max-w:1160px;
  --font-head:'Playfair Display',Georgia,serif;
  --font-body:'Inter',-apple-system,sans-serif;
  --font-mono:'Space Mono','Courier New',monospace;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent-lt)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* ── TYPOGRAPHY ────────────────────────────────────────────── */
h1,h2,h3,h4,h5,h6{font-family:var(--font-head);line-height:1.25;color:var(--text);font-weight:700}
h1{font-size:clamp(2rem,4vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:clamp(1.1rem,2vw,1.5rem)}
h4{font-size:1.1rem}
p{margin-bottom:1.25rem}
.label{font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.15em;color:var(--gold)}

/* ── LAYOUT ────────────────────────────────────────────────── */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:64px 0}

/* ── HEADER ────────────────────────────────────────────────── */
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.site-logo{display:flex;align-items:center;gap:8px;text-decoration:none}
.logo-q{font-family:var(--font-mono);font-weight:700;background:var(--accent);color:#fff;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:4px;font-size:1.1rem;flex-shrink:0}
.logo-text{font-family:var(--font-head);font-size:1.25rem;font-weight:700;color:var(--text)}
.logo-text span{color:var(--accent)}
.site-nav{display:flex;align-items:center;gap:28px}
.site-nav a{font-size:.875rem;font-weight:500;color:var(--text-muted);transition:color .2s}
.site-nav a:hover,.site-nav a.current{color:var(--accent)}
.nav-cta{background:var(--accent) !important;color:#fff !important;padding:8px 18px;border-radius:var(--radius);font-size:.8rem !important;font-weight:600 !important}
.nav-cta:hover{background:var(--accent-lt) !important}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .3s}

/* ── HERO ──────────────────────────────────────────────────── */
.hero{background:linear-gradient(135deg,#1A2E2A 0%,#2D5A4F 50%,#3D7A6D 100%);padding:80px 0 72px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 80% 50%,rgba(184,147,90,.15) 0%,transparent 60%)}
.hero-inner{position:relative;z-index:1}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:6px 14px;border-radius:20px;margin-bottom:24px}
.hero-eyebrow span{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.8)}
.hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.8rem);margin-bottom:20px;max-width:720px}
.hero h1 em{font-style:italic;color:#C8A882}
.hero-sub{font-size:1.05rem;color:rgba(255,255,255,.75);max-width:540px;margin-bottom:36px;line-height:1.65}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:var(--radius);font-size:.9rem;font-weight:600;transition:all .2s;cursor:pointer;border:none;text-decoration:none}
.btn-primary{background:var(--gold);color:#fff}
.btn-primary:hover{background:#a07d4a;color:#fff}
.btn-outline{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.btn-outline:hover{background:rgba(255,255,255,.1);color:#fff}

/* ── CATEGORY STRIP ────────────────────────────────────────── */
.category-strip{background:var(--accent);overflow:hidden}
.category-strip-inner{display:flex;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.category-strip-inner::-webkit-scrollbar{display:none}
.cat-pill{flex-shrink:0;padding:12px 24px;font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;color:rgba(255,255,255,.7);border-right:1px solid rgba(255,255,255,.15);transition:all .2s;white-space:nowrap;cursor:pointer;text-decoration:none;display:block}
.cat-pill:hover,.cat-pill.active{background:rgba(255,255,255,.1);color:#fff}

/* ── POST CARDS ────────────────────────────────────────────── */
.post-card{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;overflow:hidden;transition:box-shadow .25s,transform .25s}
.post-card:hover{box-shadow:0 8px 32px rgba(0,0,0,.08);transform:translateY(-2px)}
.post-card-img{aspect-ratio:16/9;overflow:hidden;background:var(--bg-subtle);display:block}
.post-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.post-card:hover .post-card-img img{transform:scale(1.04)}
.post-card-img-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:.65rem;color:var(--text-muted);letter-spacing:.1em;text-transform:uppercase;background:linear-gradient(135deg,var(--bg-subtle),#E8E6E0);min-height:180px}
.post-card-body{padding:22px 24px 24px}
.post-card-cat{display:inline-block;font-family:var(--font-mono);font-size:.65rem;text-transform:uppercase;letter-spacing:.12em;color:var(--gold);margin-bottom:10px}
.post-card-title{font-family:var(--font-head);font-size:1.12rem;font-weight:700;line-height:1.3;color:var(--text);margin-bottom:10px;display:block}
.post-card-title a{color:var(--text)}
.post-card:hover .post-card-title a{color:var(--accent)}
.post-card-excerpt{font-size:.875rem;color:var(--text-muted);line-height:1.65;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card-meta{display:flex;align-items:center;justify-content:space-between;font-size:.75rem;color:var(--text-muted);font-family:var(--font-mono)}
.read-time{display:inline-flex;align-items:center;gap:5px}

/* ── POSTS GRID ────────────────────────────────────────────── */
.posts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.posts-grid.cols-2{grid-template-columns:repeat(2,1fr)}

/* ── FEATURED POST ─────────────────────────────────────────── */
.post-featured{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:grid;grid-template-columns:1fr 1fr;min-height:400px}
.post-featured-img{background:linear-gradient(135deg,#1A2E2A,#2D5A4F);display:flex;align-items:center;justify-content:center;overflow:hidden;min-height:300px}
.post-featured-img img{width:100%;height:100%;object-fit:cover}
.post-featured-body{padding:44px 40px;display:flex;flex-direction:column;justify-content:center}
.featured-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(45,90,79,.08);border:1px solid rgba(45,90,79,.2);color:var(--accent);padding:5px 12px;border-radius:20px;font-family:var(--font-mono);font-size:.65rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px;width:fit-content}
.featured-badge a{color:var(--accent)}
.post-featured-body h2{font-size:clamp(1.4rem,2.5vw,1.9rem);margin-bottom:14px}
.post-featured-body h2 a{color:var(--text)}
.excerpt{font-size:.95rem;color:var(--text-muted);margin-bottom:24px;line-height:1.7}
.read-more{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);font-weight:600}

/* ── SECTION HEADER ────────────────────────────────────────── */
.section-header{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:36px;gap:16px}
.section-title{margin-bottom:6px}
.section-link{font-family:var(--font-mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--accent);white-space:nowrap;flex-shrink:0}

/* ── INGREDIENT BOX ────────────────────────────────────────── */
.ingredient-box{background:linear-gradient(135deg,#1A2E2A 0%,#2D5A4F 100%);border-radius:12px;padding:48px 44px;color:#fff;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin:32px 0 64px}
.ingredient-box h2{color:#fff}
.ingredient-box p{color:rgba(255,255,255,.75);margin-bottom:0}
.ingredient-stats{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.stat-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:8px;padding:20px}
.stat-num{font-family:var(--font-mono);font-size:1.8rem;font-weight:700;color:var(--gold);display:block;margin-bottom:4px}
.stat-label{font-size:.8rem;color:rgba(255,255,255,.6)}

/* ── SIDEBAR ───────────────────────────────────────────────── */
.content-with-sidebar{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:start}
.sidebar-widget{background:var(--bg-card);border:1px solid var(--border);border-radius:10px;padding:24px;margin-bottom:28px}
.sidebar-widget:last-child{margin-bottom:0}
.widget-title{font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.15em;color:var(--text-muted);margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--border)}
.widget-post{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}
.widget-post:last-child{border-bottom:none;padding-bottom:0}
.widget-post-title{font-size:.85rem;font-weight:600;line-height:1.35;color:var(--text);display:block;margin-bottom:4px}
.widget-post-title:hover{color:var(--accent)}
.widget-post-date{font-family:var(--font-mono);font-size:.65rem;color:var(--text-muted)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-block;background:var(--bg-subtle);border:1px solid var(--border);padding:5px 12px;border-radius:20px;font-size:.78rem;color:var(--text-muted);transition:all .2s}
.tag:hover{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ── ARTICLE ───────────────────────────────────────────────── */
.article-header{padding:56px 0 40px;background:var(--bg-subtle);border-bottom:1px solid var(--border)}
.article-meta{display:flex;align-items:center;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.cat-badge{background:rgba(45,90,79,.1);color:var(--accent);padding:4px 12px;border-radius:20px;font-family:var(--font-mono);font-size:.65rem;text-transform:uppercase;letter-spacing:.1em}
.article-meta time,.article-meta .read-time{font-family:var(--font-mono);font-size:.72rem;color:var(--text-muted)}
.article-lead{font-size:1.15rem;color:var(--text-muted);line-height:1.75;max-width:680px;margin-bottom:0}
.article-body{font-size:1rem;line-height:1.85}
.article-body h2{font-size:1.6rem;margin:40px 0 16px}
.article-body h3{font-size:1.2rem;margin:32px 0 12px}
.article-body p{margin-bottom:1.4rem}
.article-body ul,.article-body ol{margin:0 0 1.4rem 1.5rem;list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:6px}
.article-body a{color:var(--accent);text-decoration:underline;text-decoration-color:rgba(45,90,79,.3)}
.article-body a:hover{text-decoration-color:var(--accent)}
.ingredient-callout{background:var(--bg-subtle);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;padding:20px 24px;margin:28px 0}
.ingredient-callout .callout-label{font-family:var(--font-mono);font-size:.65rem;text-transform:uppercase;letter-spacing:.12em;color:var(--accent);margin-bottom:8px;display:block}
.ingredient-callout p{margin-bottom:0;color:var(--text-muted);font-size:.9rem}

/* ── COMMENTS ──────────────────────────────────────────────── */
.comments-area{margin-top:48px;padding-top:32px;border-top:1px solid var(--border)}
.comments-area h2{font-size:1.4rem;margin-bottom:24px}
.comment-list{list-style:none;margin:0 0 32px}
.comment-body{background:var(--bg-subtle);border-radius:8px;padding:20px;margin-bottom:16px}
.comment-author{font-weight:600;font-size:.9rem;margin-bottom:4px}
.comment-metadata{font-family:var(--font-mono);font-size:.65rem;color:var(--text-muted);margin-bottom:12px}
.comment-content p{font-size:.9rem;margin-bottom:0}
.comment-respond h3{font-size:1.2rem;margin-bottom:20px}
#commentform label{font-size:.85rem;font-weight:600;display:block;margin-bottom:6px}
#commentform input[type="text"],#commentform input[type="email"],#commentform input[type="url"],#commentform textarea{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:.9rem;font-family:var(--font-body);background:#fff;color:var(--text);outline:none;transition:border-color .2s;margin-bottom:16px}
#commentform input:focus,#commentform textarea:focus{border-color:var(--accent)}
#commentform textarea{min-height:120px;resize:vertical}
#commentform .submit{background:var(--accent);color:#fff;border:none;padding:11px 26px;border-radius:var(--radius);font-size:.9rem;font-weight:600;cursor:pointer;transition:background .2s}
#commentform .submit:hover{background:var(--accent-lt)}

/* ── NEWSLETTER ────────────────────────────────────────────── */
.newsletter{background:var(--bg-subtle);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:56px 0;text-align:center}
.newsletter-inner{max-width:520px;margin:0 auto}
.newsletter h3{margin-bottom:12px}
.newsletter p{color:var(--text-muted);font-size:.95rem;margin-bottom:28px}
.newsletter-form{display:flex;gap:10px;max-width:420px;margin:0 auto}
.newsletter-form input{flex:1;padding:11px 16px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:.9rem;background:#fff;color:var(--text);outline:none;transition:border-color .2s}
.newsletter-form input:focus{border-color:var(--accent)}
.newsletter-form button{background:var(--accent);color:#fff;border:none;padding:11px 22px;border-radius:var(--radius);font-size:.875rem;font-weight:600;cursor:pointer;transition:background .2s;white-space:nowrap}
.newsletter-form button:hover{background:var(--accent-lt)}

/* ── FOOTER ────────────────────────────────────────────────── */
.site-footer{background:#111;color:rgba(255,255,255,.6);padding:56px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand p{font-size:.875rem;margin-top:16px;line-height:1.65;max-width:280px;color:rgba(255,255,255,.5)}
.footer-col h4{font-family:var(--font-mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.15em;color:rgba(255,255,255,.4);margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:.875rem;color:rgba(255,255,255,.55);transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:.78rem;margin:0;color:rgba(255,255,255,.3)}

/* ── PAGINATION ────────────────────────────────────────────── */
.pagination{display:flex;justify-content:center;align-items:center;gap:8px;margin:48px 0}
.pagination .page-numbers{width:38px;height:38px;display:flex;align-items:center;justify-content:center;border:1.5px solid var(--border);border-radius:var(--radius);font-size:.85rem;color:var(--text-muted);transition:all .2s}
.pagination .page-numbers:hover,.pagination .page-numbers.current{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ── RESPONSIVE ────────────────────────────────────────────── */
@media(max-width:1024px){
  .posts-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .ingredient-box{grid-template-columns:1fr}
  .content-with-sidebar{grid-template-columns:1fr}
}
@media(max-width:768px){
  .post-featured{grid-template-columns:1fr}
  .post-featured-img{min-height:220px}
  .post-featured-body{padding:28px 24px}
  .posts-grid{grid-template-columns:1fr}
  .site-nav{display:none}
  .hamburger{display:flex}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .newsletter-form{flex-direction:column}
  .section-header{flex-direction:column;align-items:flex-start}
  .ingredient-stats{grid-template-columns:1fr 1fr}
  .section{padding:48px 0}
}
@media(max-width:480px){
  .hero{padding:56px 0 52px}
  .hero-actions{flex-direction:column}
  .btn{width:100%;justify-content:center}
  .ingredient-stats{grid-template-columns:1fr}
  .ingredient-box{padding:32px 24px}
}