/* ========================================
   RenderVault — ArchViz Blog Design System
   ======================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Outfit:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-primary: #08080c;
  --bg-secondary: #0f0f14;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --bg-glass: rgba(255,255,255,0.04);
  --border-glass: rgba(255,255,255,0.07);
  --border-glass-hover: rgba(255,255,255,0.14);
  --accent: #c9a962;
  --accent-rgb: 201,169,98;
  --accent-light: #e8d5a3;
  --accent-gradient: linear-gradient(135deg,#c9a962,#e8d5a3);
  --accent-glow: 0 0 30px rgba(201,169,98,0.25);
  --code-green: #6ee7b7;
  --success: #10b981;
  --error: #ef4444;
  --text-primary: #eae6e1;
  --text-secondary: #a09b94;
  --text-muted: #706c67;
  --font-heading: 'Outfit','Inter',sans-serif;
  --font-sans: 'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  --font-mono: 'JetBrains Mono','Fira Code',monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.6);
  --transition-fast: 150ms cubic-bezier(0.4,0,0.2,1);
  --transition-base: 250ms cubic-bezier(0.4,0,0.2,1);
  --transition-spring: 500ms cubic-bezier(0.34,1.56,0.64,1);
  --max-width: 1200px;
  --max-width-narrow: 780px;
  --nav-height: 72px;
  --space-xs: 0.25rem; --space-sm: 0.5rem; --space-md: 1rem; --space-lg: 1.5rem;
  --space-xl: 2rem; --space-2xl: 3rem; --space-3xl: 4rem; --space-4xl: 6rem;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.7;min-height:100vh;overflow-x:hidden;position:relative}
body::before{content:'';position:fixed;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at 20% 40%,rgba(201,169,98,0.04) 0%,transparent 50%),radial-gradient(ellipse at 80% 60%,rgba(201,169,98,0.025) 0%,transparent 50%);z-index:-1;animation:ambientShift 25s ease-in-out infinite}
@keyframes ambientShift{0%,100%{transform:translate(0,0)}50%{transform:translate(-1%,1%)}}
a{color:var(--accent);text-decoration:none;transition:color var(--transition-fast)}
a:hover{color:var(--accent-light)}
img{max-width:100%;height:auto;display:block}

h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:700;line-height:1.2;color:var(--text-primary)}
h1{font-size:clamp(2rem,5vw,3.2rem);font-weight:900;letter-spacing:-0.03em}
h2{font-size:clamp(1.5rem,3.5vw,2rem);font-weight:800;letter-spacing:-0.02em}
h3{font-size:clamp(1.15rem,2.5vw,1.4rem);font-weight:700}
h4{font-size:1.1rem;font-weight:600}
p{color:var(--text-secondary);margin-bottom:var(--space-md)}

/* ---- Nav ---- */
.navbar{position:fixed;top:0;left:0;right:0;height:var(--nav-height);z-index:1000;background:rgba(8,8,12,0.85);backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid var(--border-glass);transition:all var(--transition-base)}
.navbar.scrolled{background:rgba(8,8,12,0.96);box-shadow:var(--shadow-lg)}
.nav-container{max-width:var(--max-width);margin:0 auto;padding:0 var(--space-xl);height:100%;display:flex;align-items:center;justify-content:space-between}
.nav-brand{display:flex;align-items:center;gap:var(--space-sm);font-family:var(--font-heading);font-size:1.25rem;font-weight:800;color:var(--text-primary);text-decoration:none}
.nav-brand .brand-icon{width:36px;height:36px;background:var(--accent-gradient);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1rem;color:#0a0a0f;box-shadow:0 0 18px rgba(201,169,98,0.3);transition:transform var(--transition-spring)}
.nav-brand:hover .brand-icon{transform:rotate(-5deg) scale(1.05)}
.nav-brand .hl{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;align-items:center;gap:var(--space-xs);list-style:none}
.nav-links a{display:flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);color:var(--text-secondary);font-size:0.88rem;font-weight:500;border-radius:var(--radius-sm);transition:all var(--transition-fast);text-decoration:none;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--text-primary);background:var(--bg-card-hover)}
.nav-links a.active::after{content:'';position:absolute;bottom:4px;left:50%;transform:translateX(-50%);width:18px;height:2px;background:var(--accent-gradient);border-radius:var(--radius-full)}
.nav-cta{background:var(--accent-gradient)!important;color:#0a0a0f!important;font-weight:700!important;padding:var(--space-sm) var(--space-lg)!important;box-shadow:0 0 18px rgba(201,169,98,0.2)}
.nav-cta:hover{box-shadow:var(--accent-glow)!important;transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:var(--space-sm)}
.nav-toggle span{width:24px;height:2px;background:var(--text-secondary);border-radius:2px;transition:all var(--transition-base)}

main{padding-top:var(--nav-height);min-height:calc(100vh - var(--nav-height))}
.container{max-width:var(--max-width);margin:0 auto;padding:0 var(--space-xl)}
.container-narrow{max-width:var(--max-width-narrow);margin:0 auto;padding:0 var(--space-xl)}

/* ---- Hero ---- */
.hero{padding:var(--space-4xl) 0 var(--space-2xl);text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:var(--space-sm);padding:var(--space-xs) var(--space-md);background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-full);font-size:0.78rem;font-weight:600;color:var(--accent);margin-bottom:var(--space-xl);animation:fadeInUp .6s ease-out}
.hero-badge .dot{width:6px;height:6px;background:var(--accent);border-radius:50%;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.5)}}
.hero h1{margin-bottom:var(--space-lg);animation:fadeInUp .6s ease-out .1s both}
.hero .hl{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.12rem;max-width:640px;margin:0 auto var(--space-2xl);animation:fadeInUp .6s ease-out .2s both}
@keyframes fadeInUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}

/* ---- Glass Card ---- */
.glass-card{background:var(--bg-glass);border:1px solid var(--border-glass);border-radius:var(--radius-lg);backdrop-filter:blur(8px);transition:all var(--transition-base)}
.glass-card:hover{border-color:var(--border-glass-hover);background:var(--bg-card-hover)}

/* ---- Silo Grid ---- */
.silo-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-lg);margin-bottom:var(--space-3xl)}
.silo-card{padding:var(--space-xl);text-align:center;cursor:pointer;text-decoration:none;display:block}
.silo-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.silo-card .silo-icon{font-size:2.5rem;margin-bottom:var(--space-md);display:block}
.silo-card h3{font-size:1rem;margin-bottom:var(--space-sm)}
.silo-card p{font-size:0.82rem;color:var(--text-muted);margin-bottom:0}

/* ---- Blog Cards ---- */
.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:var(--space-xl)}
.blog-card{overflow:hidden;transition:all var(--transition-base);display:flex;flex-direction:column;text-decoration:none}
.blog-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.blog-card-image{width:100%;height:200px;background:var(--bg-card-hover);display:flex;align-items:center;justify-content:center;font-size:3rem;position:relative;overflow:hidden}
.blog-card-image::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(201,169,98,0.08),rgba(201,169,98,0.03))}
.blog-card-body{padding:var(--space-lg);flex:1;display:flex;flex-direction:column}
.blog-card-meta{display:flex;align-items:center;gap:var(--space-md);margin-bottom:var(--space-md);font-size:0.78rem;color:var(--text-muted)}
.blog-card-tag{display:inline-block;padding:2px 10px;background:rgba(var(--accent-rgb),0.1);color:var(--accent);border-radius:var(--radius-full);font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:0.05em}
.blog-card h3{font-size:1.1rem;margin-bottom:var(--space-sm);color:var(--text-primary);transition:color var(--transition-fast)}
.blog-card:hover h3{color:var(--accent)}
.blog-card p{font-size:0.86rem;color:var(--text-muted);flex:1;margin-bottom:0}
.blog-card .read-more{display:inline-flex;align-items:center;gap:var(--space-xs);font-size:0.82rem;font-weight:600;color:var(--accent);margin-top:var(--space-md);transition:gap var(--transition-fast)}
.blog-card:hover .read-more{gap:var(--space-sm)}

/* ---- Article ---- */
.article-header{padding:var(--space-3xl) 0 var(--space-xl);text-align:center}
.article-header .breadcrumb{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);font-size:0.82rem;color:var(--text-muted);margin-bottom:var(--space-xl);flex-wrap:wrap}
.article-header .breadcrumb a{color:var(--text-muted)}
.article-header .breadcrumb a:hover{color:var(--accent)}
.article-header h1{margin-bottom:var(--space-lg)}
.article-meta{display:flex;align-items:center;justify-content:center;gap:var(--space-lg);color:var(--text-muted);font-size:0.85rem;flex-wrap:wrap}
.article-meta .divider{width:4px;height:4px;background:var(--text-muted);border-radius:50%}
.article-content{padding-bottom:var(--space-4xl)}
.article-content h2{margin-top:var(--space-3xl);margin-bottom:var(--space-lg);padding-bottom:var(--space-sm);border-bottom:1px solid var(--border-glass)}
.article-content h3{margin-top:var(--space-2xl);margin-bottom:var(--space-md)}
.article-content p{margin-bottom:var(--space-lg);font-size:1.02rem;line-height:1.85}
.article-content ul,.article-content ol{margin-bottom:var(--space-lg);padding-left:var(--space-xl)}
.article-content li{color:var(--text-secondary);margin-bottom:var(--space-sm);font-size:1rem;line-height:1.7}
.article-content blockquote{margin:var(--space-xl) 0;padding:var(--space-lg) var(--space-xl);border-left:3px solid var(--accent);background:var(--bg-glass);border-radius:0 var(--radius-md) var(--radius-md) 0}
.article-content blockquote p{color:var(--text-primary);font-style:italic;margin-bottom:0}

/* Code blocks */
.article-content pre{margin:var(--space-xl) 0;background:#0d0d12;border:1px solid var(--border-glass);border-radius:var(--radius-md);overflow-x:auto;position:relative}
.article-content pre code{display:block;padding:var(--space-lg);font-family:var(--font-mono);font-size:0.85rem;line-height:1.7;color:var(--code-green);white-space:pre}
.code-label{position:absolute;top:0;right:0;padding:4px 12px;background:rgba(255,255,255,0.06);border-radius:0 var(--radius-md) 0 var(--radius-sm);font-family:var(--font-mono);font-size:0.7rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.05em}
.article-content code{font-family:var(--font-mono);font-size:0.88em;padding:2px 6px;background:rgba(255,255,255,0.06);border-radius:4px;color:var(--accent-light)}

/* Image prompt box */
.image-prompt-box{margin:var(--space-xl) 0;padding:var(--space-lg);background:rgba(var(--accent-rgb),0.05);border:1px solid rgba(var(--accent-rgb),0.15);border-radius:var(--radius-md)}
.image-prompt-box h4{color:var(--accent);font-size:0.85rem;text-transform:uppercase;letter-spacing:0.08em;margin-bottom:var(--space-sm)}
.image-prompt-box p{font-size:0.88rem;color:var(--text-secondary);font-style:italic;margin-bottom:0}

/* ---- Ad Slot ---- */
.ad-slot{margin:var(--space-2xl) 0;padding:var(--space-2xl);background:var(--bg-glass);border:1px dashed var(--border-glass);border-radius:var(--radius-md);text-align:center;min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--text-muted);font-size:0.78rem}

/* ---- Page Sections ---- */
.page-hero{padding:var(--space-3xl) 0 var(--space-xl);text-align:center}
.page-hero h1{margin-bottom:var(--space-md)}
.page-hero p{max-width:560px;margin:0 auto;font-size:1.08rem}
.page-content{padding-bottom:var(--space-4xl)}
.page-content h2{margin-top:var(--space-2xl);margin-bottom:var(--space-md);font-size:1.35rem}
.page-content h3{margin-top:var(--space-xl);margin-bottom:var(--space-sm);font-size:1.12rem}
.page-content p{margin-bottom:var(--space-md);line-height:1.8}
.page-content ul{margin-bottom:var(--space-md);padding-left:var(--space-xl)}
.page-content li{color:var(--text-secondary);margin-bottom:var(--space-sm);line-height:1.7}
.section-header{text-align:center;margin-bottom:var(--space-3xl)}
.section-header .overline{font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:0.15em;color:var(--accent);margin-bottom:var(--space-sm)}
.section-header h2{margin-bottom:var(--space-md)}
.section-header p{max-width:560px;margin:0 auto}

/* ---- Contact Form ---- */
.contact-form{max-width:600px;margin:var(--space-2xl) auto 0}
.contact-form .form-row{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}
.form-group{margin-bottom:var(--space-lg)}
.form-group label{display:block;font-size:0.85rem;font-weight:500;color:var(--text-secondary);margin-bottom:var(--space-sm)}
.form-group textarea,.form-group input,.form-group select{width:100%;padding:var(--space-md);background:var(--bg-secondary);border:1px solid var(--border-glass);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-sans);font-size:0.9rem;transition:all var(--transition-fast);resize:vertical}
.form-group textarea:focus,.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(var(--accent-rgb),0.12)}
.form-group textarea::placeholder,.form-group input::placeholder{color:var(--text-muted)}
.form-group select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23706c67' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:40px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-md) var(--space-xl);font-family:var(--font-sans);font-size:0.9rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);text-decoration:none;line-height:1}
.btn-primary{background:var(--accent-gradient);color:#0a0a0f;box-shadow:0 4px 15px rgba(var(--accent-rgb),0.25)}
.btn-primary:hover{box-shadow:var(--accent-glow);transform:translateY(-2px)}
.btn-secondary{background:var(--bg-card-hover);color:var(--text-primary);border:1px solid var(--border-glass)}
.btn-secondary:hover{background:rgba(255,255,255,0.08);border-color:var(--border-glass-hover)}
.btn-full{width:100%}

/* ---- Footer ---- */
.site-footer{border-top:1px solid var(--border-glass);padding:var(--space-3xl) 0 var(--space-xl);background:var(--bg-secondary)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:var(--space-2xl);margin-bottom:var(--space-2xl)}
.footer-brand{display:flex;align-items:center;gap:var(--space-sm);font-family:var(--font-heading);font-size:1.1rem;font-weight:700;color:var(--text-primary);margin-bottom:var(--space-md)}
.footer-brand .brand-icon{width:28px;height:28px;background:var(--accent-gradient);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:0.85rem;color:#0a0a0f}
.footer-desc{color:var(--text-muted);font-size:0.86rem;line-height:1.7;max-width:300px}
.footer-col h4{font-size:0.78rem;font-weight:600;text-transform:uppercase;letter-spacing:0.1em;color:var(--text-secondary);margin-bottom:var(--space-lg)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:var(--space-sm)}
.footer-col a{color:var(--text-muted);font-size:0.86rem;transition:color var(--transition-fast)}
.footer-col a:hover{color:var(--text-primary)}
.footer-bottom{border-top:1px solid var(--border-glass);padding-top:var(--space-xl);display:flex;align-items:center;justify-content:space-between;font-size:0.78rem;color:var(--text-muted)}
.footer-bottom-links{display:flex;gap:var(--space-lg)}
.footer-bottom-links a{color:var(--text-muted);font-size:0.78rem}
.footer-bottom-links a:hover{color:var(--text-secondary)}

/* Toast */
.toast{position:fixed;bottom:24px;right:24px;padding:var(--space-md) var(--space-lg);background:var(--bg-secondary);border:1px solid var(--border-glass);border-radius:var(--radius-md);color:var(--text-primary);font-size:0.86rem;box-shadow:var(--shadow-xl);transform:translateY(120%);transition:transform var(--transition-spring);z-index:9999;display:flex;align-items:center;gap:var(--space-sm)}
.toast.show{transform:translateY(0)}

/* Scrollbar */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg-primary)}
::-webkit-scrollbar-thumb{background:var(--border-glass-hover);border-radius:3px}

/* ---- Responsive ---- */
@media(max-width:1024px){.silo-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){
  :root{--space-xl:1.5rem;--space-2xl:2rem;--space-3xl:2.5rem;--space-4xl:3rem}
  .nav-links{position:fixed;top:var(--nav-height);left:0;right:0;background:rgba(8,8,12,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:var(--space-xl);gap:var(--space-xs);border-bottom:1px solid var(--border-glass);transform:translateY(-100%);opacity:0;visibility:hidden;transition:all var(--transition-base)}
  .nav-links.open{transform:translateY(0);opacity:1;visibility:visible}
  .nav-links a{width:100%;justify-content:center;padding:var(--space-md)}
  .nav-toggle{display:flex}
  .nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .nav-toggle.active span:nth-child(2){opacity:0}
  .nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  .silo-grid{grid-template-columns:1fr}
  .blog-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:var(--space-md);text-align:center}
  .contact-form .form-row{grid-template-columns:1fr}
}
@media(max-width:480px){.container,.container-narrow{padding:0 var(--space-md)}}