/* =========================================================
   SAIPRAVEEN DURAIRAMAN — Portfolio v3.1
   Hero + Equal Nav Cards · Shadow Depth · Navy + Amber
   ========================================================= */

/* 1. CUSTOM PROPERTIES
   ========================================================= */
:root {
  --bg: #F7F6F3;
  --bg-alt: #EFEDEA;
  --surface: #FFFFFF;
  --text: #1A1A1A;
  --text-secondary: #555;
  --text-muted: #999;
  --accent: #3D5A80;
  --accent-light: rgba(61,90,128,.07);
  --accent-warm: #D4943A;
  --accent-warm-light: rgba(212,148,58,.08);
  --accent-warm-glow: rgba(212,148,58,.55);
  --accent-sage: #5A7A6A;
  --accent-sage-light: rgba(90,122,106,.08);
  --accent-stone: #8A7A5E;
  --accent-stone-light: rgba(138,122,94,.08);
  --border: #E0DDD8;
  --border-light: #E8E6E2;

  --font-heading: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --space-xs: .25rem;
  --space-sm: .5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 1px 4px rgba(0,0,0,.05), 0 2px 8px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.07), 0 1px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.1), 0 4px 12px rgba(0,0,0,.05);
  --shadow-card: 0 2px 8px rgba(0,0,0,.05), 0 0 0 1px rgba(0,0,0,.03);
  --shadow-card-hover: 0 8px 28px rgba(0,0,0,.1), 0 0 0 1px rgba(0,0,0,.04);

  --ease: cubic-bezier(.4,0,.2,1);
  --ease-out: cubic-bezier(0,0,.2,1);
  --ease-spring: cubic-bezier(.175,.885,.32,1.275);

  --nav-h: 56px;
  --max-w: 1100px;
}

/* 2. RESET
   ========================================================= */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:var(--font-body);font-size:16px;line-height:1.65;color:var(--text);background:var(--bg);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{border:none;background:none;cursor:pointer;font-family:inherit}

/* Page entrance */
body{opacity:0;animation:pageIn .5s var(--ease-out) .05s forwards}
@keyframes pageIn{to{opacity:1}}

/* 3. TYPOGRAPHY
   ========================================================= */
h1,h2,h3{font-family:var(--font-heading);font-weight:600;line-height:1.15;letter-spacing:-.02em}
h1{font-size:clamp(2rem,5vw,3rem)}
h2{font-size:clamp(1.6rem,3.5vw,2.25rem)}
h3{font-size:1.15rem}

.label{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}

/* 4. LAYOUT
   ========================================================= */
.container{max-width:var(--max-w);margin:0 auto;padding:0 var(--space-lg)}
section{padding:var(--space-3xl) 0}
.section-header{margin-bottom:var(--space-2xl)}
.section-label{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin-bottom:var(--space-sm)}
.section-sub{color:var(--text-secondary);margin-top:var(--space-sm);max-width:480px}

/* 5. NAVIGATION
   ========================================================= */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);display:flex;align-items:center;transition:all .3s var(--ease)}
.nav.scrolled{background:rgba(247,246,243,.88);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:0 1px 0 var(--border-light)}
.nav-inner{max-width:var(--max-w);margin:0 auto;padding:0 var(--space-lg);display:grid;grid-template-columns:auto 1fr auto auto;align-items:center;width:100%}
.nav-logo{font-family:var(--font-heading);font-size:1.1rem;font-weight:700;letter-spacing:-.03em;color:var(--accent);transition:opacity .2s}
.nav-logo:hover{opacity:.6}
.nav-links{display:flex;gap:var(--space-lg);align-items:center;justify-content:center}
.nav-link{font-size:.875rem;font-weight:500;color:var(--text-secondary);position:relative;transition:color .2s;padding:var(--space-xs) 0}
.nav-link::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--accent);border-radius:1px;transition:width .25s var(--ease)}
.nav-link:hover,.nav-link.active{color:var(--text)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
/* Home button — stands out with accent pill */
.nav-link--home{background:var(--accent);color:white;padding:5px 16px;border-radius:var(--radius-full);font-weight:600;transition:all .25s var(--ease)}
.nav-link--home::after{display:none}
.nav-link--home:hover,.nav-link--home.active{color:white;background:var(--accent-warm);box-shadow:0 2px 8px rgba(212,148,58,.25)}

/* LED Toggle in nav */
.led-toggle{display:flex;align-items:center;gap:6px;margin-left:var(--space-lg);cursor:pointer;user-select:none;-webkit-user-select:none}
.led-toggle-label{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);transition:color .2s}
.led-toggle.active .led-toggle-label{color:var(--accent-warm)}
.led-toggle-switch{width:34px;height:18px;border-radius:9px;background:var(--border);position:relative;transition:background .3s var(--ease)}
.led-toggle.active .led-toggle-switch{background:var(--accent-warm)}
.led-toggle-knob{position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:white;box-shadow:var(--shadow-xs);transition:transform .3s var(--ease-spring)}
.led-toggle.active .led-toggle-knob{transform:translateX(16px)}

/* LED Mode — Dark theme + background LED grid */
body.led-mode{
  --bg: #0D0D0D;
  --bg-alt: #151515;
  --surface: rgba(22,22,22,.95);
  --text: #E0DDD8;
  --text-secondary: #AAA;
  --text-muted: #666;
  --accent-light: rgba(61,90,128,.15);
  --accent-sage-light: rgba(90,122,106,.15);
  --accent-stone-light: rgba(138,122,94,.15);
  --accent-warm-light: rgba(212,148,58,.15);
  --border: #2A2A2A;
  --border-light: #222;
  --shadow-card: 0 2px 8px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.04);
  --shadow-card-hover: 0 8px 28px rgba(0,0,0,.5), 0 0 0 1px rgba(255,255,255,.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,.5), 0 4px 12px rgba(0,0,0,.3);
  background: transparent;
}
/* Dark mode nav */
body.led-mode .nav{background:rgba(13,13,13,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
body.led-mode .nav.scrolled{background:rgba(13,13,13,.95);box-shadow:0 1px 0 #222}
body.led-mode .nav-toggle span{background:var(--text)}
body.led-mode .nav-links{background:#0D0D0D}
body.led-mode .nav-link--home{background:var(--accent);color:white}
body.led-mode .nav-link--home:hover{background:var(--accent-warm);color:white}
/* Dark mode element overrides */
body.led-mode .project-card-ph--teal{background:linear-gradient(135deg,#1a2a35,#162230)}
body.led-mode .project-card-ph--sage{background:linear-gradient(135deg,#1a2a1e,#16251a)}
body.led-mode .project-card-ph--stone{background:linear-gradient(135deg,#2a251a,#221e16)}
body.led-mode .project-card-ph--warm{background:linear-gradient(135deg,#2a2218,#221c14)}
body.led-mode .filter-btn{border-color:#333;color:var(--text-secondary)}
body.led-mode .filter-btn:hover{border-color:var(--accent);color:var(--accent)}
body.led-mode .filter-btn.active{background:var(--accent);color:white;border-color:var(--accent)}
body.led-mode .page-404-code{color:#333}
body.led-mode .footer{border-top-color:#222}
body.led-mode .timeline::before{background:#333}
body.led-mode .stats-strip{border-bottom-color:#333}

/* LED overlay — z-index 998 so dots show through transparent gaps */
.led-overlay{position:fixed;inset:0;z-index:998;background:#0D0D0D;display:none;overflow:hidden;pointer-events:none}
.led-overlay.visible{display:block}
.led-grid{display:grid;grid-template-columns:repeat(auto-fill,10px);gap:6px;justify-content:center;padding:8px;width:100%;height:100%;align-content:start;pointer-events:auto}
.led-dot{width:10px;height:10px;border-radius:50%;background:#1A1A1A;cursor:crosshair}
.led-dot:hover{background:#282828}
.led-dot.lit{background:var(--accent-warm);box-shadow:0 0 6px var(--accent-warm-glow),0 0 16px rgba(212,148,58,.25)}

/* Content wrappers: transparent + pass pointer events through to dots */
body.led-mode main,
body.led-mode .home,
body.led-mode .home-inner,
body.led-mode section,
body.led-mode .container,
body.led-mode .connect,
body.led-mode footer{position:relative;z-index:999;background:transparent;pointer-events:none}
/* Interactive content blocks: opaque + clickable */
body.led-mode .hero-card,
body.led-mode .nav-card,
body.led-mode .nav-grid,
body.led-mode .page-hero,
body.led-mode .stats-strip,
body.led-mode .tl-item,
body.led-mode .edu-card,
body.led-mode .skills-grid,
body.led-mode .filter-bar,
body.led-mode .projects-grid,
body.led-mode .project-card,
body.led-mode .lab-card,
body.led-mode .connect-inner,
body.led-mode .connect-link,
body.led-mode .section-header,
body.led-mode .footer-inner,
body.led-mode .page-404 > div,
body.led-mode .btn,
body.led-mode a{pointer-events:auto}

/* Mobile menu toggle */
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:4px;width:28px;z-index:1001}
.nav-toggle span{display:block;width:100%;height:1.5px;background:var(--text);transition:all .3s var(--ease);transform-origin:center}
.nav-toggle.active span:first-child{transform:translateY(3.25px) rotate(45deg)}
.nav-toggle.active span:last-child{transform:translateY(-3.25px) rotate(-45deg)}

/* 6. BUTTONS & TAGS
   ========================================================= */
.btn{display:inline-flex;align-items:center;gap:var(--space-sm);padding:10px 24px;border-radius:var(--radius-full);font-size:.875rem;font-weight:500;transition:all .25s var(--ease)}
.btn-primary{background:var(--accent);color:white}
.btn-primary:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}
.btn-secondary{border:1.5px solid var(--border);color:var(--text)}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.btn-ghost{font-size:.875rem;font-weight:500;color:var(--text-secondary);transition:color .2s}
.btn-ghost:hover{color:var(--accent)}
.btn-ghost .arrow{display:inline-block;transition:transform .2s}
.btn-ghost:hover .arrow{transform:translateX(3px)}

.tag{display:inline-block;padding:4px 12px;border-radius:var(--radius-full);font-size:.7rem;font-weight:500}
.tag--accent{background:var(--accent-light);color:var(--accent)}
.tag--sage{background:var(--accent-sage-light);color:var(--accent-sage)}
.tag--stone{background:var(--accent-stone-light);color:var(--accent-stone)}
.tag--warm{background:var(--accent-warm-light);color:var(--accent-warm)}
.tag--default{background:var(--bg-alt);color:var(--text-secondary)}

/* 7. ANIMATIONS
   ========================================================= */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes scaleIn{from{opacity:0;transform:translate(-50%,-50%) scale(.96)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}

.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-d1{transition-delay:.08s}
.reveal-d2{transition-delay:.16s}
.reveal-d3{transition-delay:.24s}
.reveal-d4{transition-delay:.32s}

/* 8. HOME PAGE — HERO + NAV GRID
   ========================================================= */
.home{min-height:100vh;min-height:100dvh;display:flex;align-items:center;padding:calc(var(--nav-h) + var(--space-xl)) var(--space-lg) var(--space-xl)}
.home-inner{max-width:var(--max-w);margin:0 auto;width:100%}

/* Hero card */
.hero-card{
  background:var(--surface);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  display:flex;
  overflow:hidden;
  opacity:0;
  animation:fadeUp .6s var(--ease-out) .1s both;
}
.hero-card:hover{box-shadow:var(--shadow-card-hover)}
.hero-photo{width:280px;flex-shrink:0}
.hero-photo img{width:100%;height:100%;object-fit:cover}
.hero-content{padding:var(--space-xl);display:flex;flex-direction:column;justify-content:center}
.hero-label{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:var(--space-sm)}
.hero-content h1{font-size:clamp(1.6rem,3.5vw,2.2rem);margin-bottom:var(--space-xs);line-height:1.1}
.hero-role{font-size:.9rem;color:var(--accent);font-weight:500;margin-bottom:var(--space-md)}
.hero-bio{font-size:.9rem;color:var(--text-secondary);line-height:1.7;max-width:440px}
.hero-stats{display:flex;gap:var(--space-xl);margin-top:var(--space-lg)}
.hero-stat{display:flex;align-items:baseline;gap:4px}
.hero-stat-val{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;color:var(--accent);letter-spacing:-.02em}
.hero-stat-label{font-size:.75rem;color:var(--text-muted)}

/* Navigation grid — 4 equal cards */
.nav-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:var(--space-md);
  margin-top:var(--space-md);
}
.nav-card{
  background:var(--surface);
  border-radius:var(--radius-lg);
  padding:var(--space-xl);
  box-shadow:var(--shadow-card);
  display:flex;
  flex-direction:column;
  text-decoration:none;
  color:inherit;
  transition:all .35s var(--ease);
  opacity:0;
  animation:fadeUp .6s var(--ease-out) both;
}
.nav-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-3px)}
.nav-card:nth-child(1){animation-delay:.3s}
.nav-card:nth-child(2){animation-delay:.38s}
.nav-card:nth-child(3){animation-delay:.46s}
.nav-card:nth-child(4){animation-delay:.54s}
.nav-card-title{font-family:var(--font-heading);font-size:1.25rem;font-weight:600;letter-spacing:-.01em}
.nav-card-desc{font-size:.85rem;color:var(--text-secondary);line-height:1.5;margin-top:var(--space-xs);flex:1}
.nav-card-arrow{font-size:1.2rem;color:var(--text-muted);align-self:flex-end;margin-top:var(--space-lg);transition:all .25s var(--ease)}
.nav-card:hover .nav-card-arrow{transform:translateX(5px);color:var(--accent)}

/* 9. JOURNEY PAGE
   ========================================================= */
.page-hero{padding:calc(var(--nav-h) + var(--space-3xl)) 0 var(--space-xl)}
.page-hero h1{margin-bottom:var(--space-sm)}
.page-hero .page-sub{color:var(--text-secondary);max-width:520px;font-size:1.05rem}

/* Stats strip */
.stats-strip{display:flex;gap:var(--space-2xl);padding:var(--space-lg) 0;margin-bottom:var(--space-xl);border-bottom:1px solid var(--border-light)}
.stats-strip .stat-val{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;letter-spacing:-.02em;color:var(--accent)}
.stats-strip .stat-lbl{font-size:.75rem;color:var(--text-muted)}

/* Timeline */
.timeline{position:relative;padding-left:var(--space-xl)}
.timeline::before{content:'';position:absolute;left:0;top:8px;bottom:0;width:1.5px;background:var(--border)}

.tl-item{position:relative;padding-bottom:var(--space-2xl)}
.tl-item:last-child{padding-bottom:0}
.tl-dot{position:absolute;left:calc(-1 * var(--space-xl) - 4px);top:8px;width:9px;height:9px;border-radius:50%;background:var(--border);border:2px solid var(--bg)}
.tl-item:first-child .tl-dot{background:var(--accent);width:10px;height:10px;left:calc(-1 * var(--space-xl) - 4.5px)}
.tl-date{font-family:var(--font-mono);font-size:.7rem;color:var(--text-muted);letter-spacing:.04em;margin-bottom:var(--space-xs)}
.tl-role{font-family:var(--font-heading);font-size:1.25rem;font-weight:600;letter-spacing:-.01em;margin-bottom:2px}
.tl-co{font-size:.85rem;color:var(--accent);font-weight:500}
.tl-loc{font-size:.75rem;color:var(--text-muted);margin-bottom:var(--space-sm)}
.tl-points li{font-size:.875rem;color:var(--text-secondary);padding:3px 0 3px var(--space-md);position:relative}
.tl-points li::before{content:'';position:absolute;left:0;top:11px;width:4px;height:4px;border-radius:50%;background:var(--border)}

/* Education & Cert */
.edu-card{padding:var(--space-lg);background:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-card)}
.edu-card+.edu-card{margin-top:var(--space-md)}
.edu-degree{font-family:var(--font-heading);font-size:1.05rem;font-weight:600}
.edu-school{font-size:.85rem;color:var(--accent)}
.edu-meta{font-size:.8rem;color:var(--text-muted);margin-top:var(--space-xs)}

/* Skills */
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:var(--space-lg)}
.skill-group-title{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);margin-bottom:var(--space-sm)}
.skill-tags{display:flex;flex-wrap:wrap;gap:var(--space-xs)}

/* 10. PROJECTS PAGE
   ========================================================= */
.filter-bar{display:flex;gap:var(--space-sm);flex-wrap:wrap;margin-bottom:var(--space-xl)}
.filter-btn{padding:7px 18px;border-radius:var(--radius-full);font-size:.8rem;font-weight:500;color:var(--text-secondary);border:1.5px solid var(--border);background:transparent;transition:all .25s var(--ease);cursor:pointer}
.filter-btn:hover{border-color:var(--accent);color:var(--accent)}
.filter-btn.active{background:var(--accent);color:white;border-color:var(--accent)}

.projects-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--space-lg)}

.project-card{background:var(--surface);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-card);transition:all .35s var(--ease);cursor:pointer}
.project-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover)}
.project-card-img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease)}
.project-card:hover .project-card-img{transform:scale(1.03)}
.project-card-body{padding:var(--space-lg)}
.project-card-year{font-family:var(--font-mono);font-size:.7rem;color:var(--text-muted)}
.project-card-title{font-family:var(--font-heading);font-size:1.05rem;font-weight:600;margin:var(--space-xs) 0}
.project-card-desc{font-size:.85rem;color:var(--text-secondary);line-height:1.5;margin-bottom:var(--space-sm)}
.project-card-tags{display:flex;flex-wrap:wrap;gap:4px}

/* Gradient placeholder for cards without images */
.project-card-ph{width:100%;aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;font-size:2rem;color:var(--text-muted)}
.project-card-ph--teal{background:linear-gradient(135deg,#d8e2ef,#c2cedf)}
.project-card-ph--sage{background:linear-gradient(135deg,#dee8d6,#c8d6be)}
.project-card-ph--stone{background:linear-gradient(135deg,#e6e0d4,#d4ccbe)}
.project-card-ph--warm{background:linear-gradient(135deg,#e8e2da,#dbd3c8)}

/* 11. MODAL & LIGHTBOX
   ========================================================= */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:2000;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.modal-overlay.active{display:block;animation:fadeIn .25s var(--ease)}

.modal-sheet{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(.96);opacity:0;width:92%;max-width:680px;max-height:85vh;background:var(--surface);border-radius:var(--radius-lg);overflow-y:auto;overflow-x:hidden;z-index:2001;box-shadow:var(--shadow-lg);transition:all .35s var(--ease)}
.modal-overlay.active .modal-sheet{transform:translate(-50%,-50%) scale(1);opacity:1}

.modal-close{position:sticky;top:0;display:flex;align-items:center;justify-content:flex-end;padding:var(--space-md) var(--space-lg);background:linear-gradient(var(--surface) 60%,transparent);z-index:1}
.modal-close button{width:32px;height:32px;border-radius:50%;background:var(--bg-alt);display:flex;align-items:center;justify-content:center;font-size:1rem;color:var(--text-secondary);transition:all .2s}
.modal-close button:hover{background:var(--border);transform:scale(1.1)}

.modal-hero-img{width:calc(100% - var(--space-lg) * 2);aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-md);margin:0 var(--space-lg)}
.modal-body{padding:var(--space-lg)}
.modal-body h2{font-size:1.35rem;margin-bottom:var(--space-sm)}
.modal-body p{font-size:.9rem;color:var(--text-secondary);line-height:1.65;margin-bottom:var(--space-md)}
.modal-body .modal-tags{display:flex;flex-wrap:wrap;gap:var(--space-xs);margin-bottom:var(--space-lg)}
.modal-links{display:flex;gap:var(--space-md);margin-bottom:var(--space-lg)}
.modal-links a{font-size:.85rem;font-weight:500;color:var(--accent);display:inline-flex;align-items:center;gap:4px;transition:opacity .2s}
.modal-links a:hover{opacity:.7}

.modal-gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:var(--space-sm)}
.modal-gallery img{border-radius:var(--radius-sm);aspect-ratio:4/3;object-fit:cover;cursor:pointer;transition:transform .3s,box-shadow .3s}
.modal-gallery img:hover{transform:scale(1.03);box-shadow:var(--shadow-md)}

/* Lightbox */
.lightbox{display:none;position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:3000;align-items:center;justify-content:center;cursor:zoom-out;padding:var(--space-lg)}
.lightbox.active{display:flex;animation:fadeIn .2s}
.lightbox img{max-width:90%;max-height:90vh;object-fit:contain;border-radius:var(--radius-sm)}

/* 12. LAB PAGE
   ========================================================= */
.lab-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--space-md)}
.lab-card{padding:var(--space-lg);background:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-card);transition:all .35s var(--ease)}
.lab-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-card-hover)}
.lab-card-icon{font-size:1.25rem;margin-bottom:var(--space-sm)}
.lab-card-type{font-family:var(--font-mono);font-size:.65rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:var(--space-sm)}
.lab-card-type--idea{color:var(--accent-warm)}
.lab-card-type--explore{color:var(--accent-sage)}
.lab-card-type--thought{color:var(--accent)}
.lab-card-type--signal{color:var(--text-muted)}
.lab-card-title{font-family:var(--font-heading);font-size:1rem;font-weight:600;margin-bottom:var(--space-xs);letter-spacing:-.01em}
.lab-card-text{font-size:.85rem;color:var(--text-secondary);line-height:1.55}

/* Large quote card */
.lab-card--quote{grid-column:span 2;border-left:3px solid var(--accent);padding:var(--space-xl)}
.lab-card--quote .lab-card-title{font-size:1.25rem;line-height:1.35}

/* 13. CONNECT PAGE
   ========================================================= */
.connect{min-height:80vh;display:flex;align-items:center;padding:calc(var(--nav-h) + var(--space-2xl)) 0 var(--space-2xl)}
.connect-inner{max-width:520px}
.connect-note{font-size:1.05rem;color:var(--text-secondary);line-height:1.7;margin:var(--space-lg) 0 var(--space-xl)}
.connect-links{display:flex;flex-direction:column;gap:var(--space-sm)}
.connect-link{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);background:var(--surface);border-radius:var(--radius-md);box-shadow:var(--shadow-card);transition:all .3s var(--ease)}
.connect-link:hover{transform:translateX(6px);box-shadow:var(--shadow-card-hover)}
.connect-link-icon{width:40px;height:40px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1rem;flex-shrink:0;background:var(--accent-light);color:var(--accent);font-weight:600}
.connect-link-label{font-weight:600;font-size:.9rem}
.connect-link-handle{font-size:.8rem;color:var(--text-muted)}

/* 14. 404 PAGE
   ========================================================= */
.page-404{min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:var(--space-2xl)}
.page-404-code{font-family:var(--font-heading);font-size:clamp(5rem,15vw,8rem);font-weight:700;color:var(--border);letter-spacing:-.04em;line-height:1}
.page-404 p{color:var(--text-secondary);margin:var(--space-sm) 0 var(--space-lg);max-width:320px}

/* 15. FOOTER
   ========================================================= */
.footer{padding:var(--space-xl) 0;border-top:1px solid var(--border-light)}
.footer-inner{display:flex;justify-content:space-between;align-items:center}
.footer-text{font-size:.8rem;color:var(--text-muted)}
.footer-links{display:flex;gap:var(--space-lg)}
.footer-links a{font-size:.8rem;color:var(--text-secondary);transition:color .2s}
.footer-links a:hover{color:var(--accent)}

/* 16. RESPONSIVE
   ========================================================= */
@media(max-width:768px){
  :root{--space-xl:2rem;--space-2xl:3rem;--space-3xl:4rem}
  .nav-inner{display:flex;justify-content:space-between}
  .nav-links{display:none;position:fixed;inset:0;background:var(--bg);flex-direction:column;justify-content:center;align-items:center;gap:var(--space-xl);z-index:999}
  .nav-links.open{display:flex}
  .nav-links .nav-link{font-size:1.25rem}
  .nav-links .nav-link--home{font-size:1.25rem;padding:8px 28px}
  .nav-toggle{display:flex}
  .led-toggle{margin-left:auto;margin-right:var(--space-md)}
  .hero-card{flex-direction:column}
  .hero-photo{width:100%;height:220px}
  .nav-grid{grid-template-columns:1fr 1fr}
  .stats-strip{gap:var(--space-lg);flex-wrap:wrap}
  .projects-grid{grid-template-columns:1fr}
  .lab-grid{grid-template-columns:1fr}
  .lab-card--quote{grid-column:span 1}
  .footer-inner{flex-direction:column;gap:var(--space-md);text-align:center}
  .modal-sheet{top:auto;bottom:0;left:0;right:0;transform:translateY(100%);width:100%;max-width:100%;max-height:92vh;border-radius:var(--radius-lg) var(--radius-lg) 0 0}
  .modal-overlay.active .modal-sheet{transform:translateY(0)}
}
@media(max-width:480px){
  .home{padding:calc(var(--nav-h) + var(--space-lg)) var(--space-md) var(--space-lg)}
  .nav-grid{grid-template-columns:1fr}
  .hero-photo{height:180px}
  .hero-stats{gap:var(--space-lg)}
  .stats-strip{gap:var(--space-md)}
  .modal-gallery{grid-template-columns:repeat(2,1fr)}
  .led-grid{grid-template-columns:repeat(auto-fill,8px);gap:4px;padding:calc(var(--nav-h) + 12px) 12px 12px}
  .led-dot{width:8px;height:8px}
}