/* ============================================================
   Bynteq v2.0 — main.css
   Core design tokens, base resets, layout utilities
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  --bg-base:        #080d1a;
  --bg-surface:     #0f1629;
  --bg-card:        rgba(255,255,255,0.04);
  --bg-card-hover:  rgba(255,255,255,0.07);
  --bg-glass:       rgba(15,22,41,0.85);
  --bg-input:       rgba(255,255,255,0.06);
  --text-primary:   #f0f4ff;
  --text-secondary: #8b9ab8;
  --text-muted:     #4a5570;
  --text-link:      #818cf8;
  --accent-1:       #6366f1;
  --accent-2:       #22d3ee;
  --accent-android: #00c853;
  --accent-warm:    #f472b6;
  --accent-gold:    #fbbf24;
  --border:         rgba(255,255,255,0.08);
  --border-accent:  rgba(99,102,241,0.4);
  --shadow-sm:  0 2px 8px  rgba(0,0,0,0.3);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.25);
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  40px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;
  --font-sans: 'Inter','Poppins',system-ui,sans-serif;
  --font-mono: 'JetBrains Mono','Fira Code',monospace;
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;
  --ease-out: cubic-bezier(0.22,1,0.36,1);
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 400ms;
  --max-w-sm:  640px;
  --max-w-md:  768px;
  --max-w-lg:  1024px;
  --max-w-xl:  1200px;
  --max-w-2xl: 1440px;
  --navbar-h:  72px;
}

[data-theme="light"] {
  --bg-base:       #f8faff;
  --bg-surface:    #ffffff;
  --bg-card:       rgba(255,255,255,0.85);
  --bg-card-hover: rgba(255,255,255,1);
  --bg-glass:      rgba(255,255,255,0.9);
  --bg-input:      rgba(0,0,0,0.04);
  --text-primary:  #0f172a;
  --text-secondary:#475569;
  --text-muted:    #94a3b8;
  --text-link:     #4f46e5;
  --border:        rgba(0,0,0,0.08);
  --border-accent: rgba(99,102,241,0.35);
  --shadow-sm:  0 2px 8px  rgba(0,0,0,0.06);
  --shadow-md:  0 8px 32px rgba(0,0,0,0.1);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 40px rgba(99,102,241,0.15);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;}
body{
  font-family:var(--font-sans);
  font-size:var(--text-base);
  line-height:1.7;
  color:var(--text-primary);
  background-color:var(--bg-base);
  min-height:100vh;
  overflow-x:hidden;
  transition:background-color var(--dur-slow) var(--ease-out),color var(--dur-slow) var(--ease-out);
}
body.no-scroll{overflow:hidden;}
a{color:var(--text-link);text-decoration:none;transition:color var(--dur-fast);}
a:hover{color:var(--accent-2);}
a:focus-visible{outline:2px solid var(--accent-1);outline-offset:3px;border-radius:var(--radius-xs);}
img,video{display:block;max-width:100%;height:auto;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
button:focus-visible{outline:2px solid var(--accent-1);outline-offset:3px;border-radius:var(--radius-sm);}
input,textarea,select{font-family:inherit;}
ul,ol{list-style:none;}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.25;letter-spacing:-0.02em;color:var(--text-primary);}
p{color:var(--text-secondary);}
strong{color:var(--text-primary);font-weight:600;}
code{font-family:var(--font-mono);font-size:0.875em;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-xs);padding:2px 6px;color:var(--accent-2);}

/* Page transitions */
body{opacity:0;}
body.loaded{opacity:1;transition:opacity 0.4s ease;}
body.fade-out{opacity:0;transition:opacity 0.3s ease;}

/* Progress bar */
#progress-bar{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--accent-1),var(--accent-2));z-index:9999;transition:width 0.1s linear;border-radius:0 2px 2px 0;}

/* Gradient text */
.gradient-text{background:linear-gradient(135deg,var(--accent-1) 0%,var(--accent-2) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;}

/* Container */
.container{width:100%;max-width:var(--max-w-xl);margin:0 auto;padding:0 var(--space-lg);}
.container--narrow{max-width:var(--max-w-md);margin:0 auto;padding:0 var(--space-lg);}
section{padding:var(--space-3xl) 0;}

/* Section title */
.section-title{text-align:center;margin-bottom:var(--space-xl);}
.section-title h2{font-size:clamp(var(--text-2xl),3vw,var(--text-4xl));margin-bottom:var(--space-sm);}
.section-title p{font-size:var(--text-lg);color:var(--text-secondary);max-width:600px;margin:0 auto;}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(24px);transition:opacity 0.6s var(--ease-out),transform 0.6s var(--ease-out);}
.reveal.active{opacity:1;transform:none;}
.reveal:nth-child(2){transition-delay:0.1s;}
.reveal:nth-child(3){transition-delay:0.2s;}
.reveal:nth-child(4){transition-delay:0.3s;}

/* Background blobs */
.bg-blobs{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden;}
.bg-blobs__blob{position:absolute;border-radius:50%;filter:blur(120px);opacity:0.08;animation:blobFloat 20s ease-in-out infinite alternate;}
.bg-blobs__blob:nth-child(1){width:600px;height:600px;background:var(--accent-1);top:-200px;left:-100px;animation-duration:18s;}
.bg-blobs__blob:nth-child(2){width:500px;height:500px;background:var(--accent-2);top:40%;right:-150px;animation-duration:22s;animation-delay:-8s;}
.bg-blobs__blob:nth-child(3){width:400px;height:400px;background:var(--accent-android);bottom:-100px;left:30%;animation-duration:25s;animation-delay:-14s;}
@keyframes blobFloat{from{transform:translate(0,0) scale(1);}to{transform:translate(40px,30px) scale(1.08);}}
[data-theme="light"] .bg-blobs__blob{opacity:0.04;}
main{position:relative;z-index:1;}

/* Skip link */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--accent-1);color:#fff;padding:8px 16px;border-radius:0 0 var(--radius-sm) var(--radius-sm);z-index:10000;font-weight:600;}
.skip-link:focus{left:0;}

/* Loading screen */
#loading-screen{position:fixed;inset:0;background:var(--bg-base);display:flex;align-items:center;justify-content:center;z-index:99999;transition:opacity 0.5s ease,visibility 0.5s ease;}
#loading-screen.hidden{opacity:0;visibility:hidden;pointer-events:none;}
.loader-logo{font-size:var(--text-3xl);font-weight:800;background:linear-gradient(135deg,var(--accent-1),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:loaderPulse 1.2s ease-in-out infinite;}
@keyframes loaderPulse{0%,100%{opacity:1;transform:scale(1);}50%{opacity:0.6;transform:scale(0.96);}}

/* Toast */
#toast-container{position:fixed;bottom:var(--space-lg);right:var(--space-lg);z-index:9998;display:flex;flex-direction:column;gap:var(--space-sm);pointer-events:none;}
.toast{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-md) var(--space-lg);color:var(--text-primary);font-size:var(--text-sm);font-weight:500;display:flex;align-items:center;gap:var(--space-sm);min-width:240px;max-width:360px;pointer-events:auto;transform:translateX(120%);opacity:0;transition:transform var(--dur-base) var(--ease-out),opacity var(--dur-base) var(--ease-out);box-shadow:var(--shadow-md);}
.toast.show{transform:translateX(0);opacity:1;}
.toast.success{border-left:3px solid var(--accent-android);}
.toast.info{border-left:3px solid var(--accent-2);}
.toast.warning{border-left:3px solid var(--accent-gold);}
.toast.error{border-left:3px solid #ef4444;}

/* Back to top */
#topBtn{position:fixed;bottom:var(--space-xl);right:var(--space-xl);width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--accent-1),var(--accent-2));color:#fff;font-size:var(--text-lg);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-md);opacity:0;transform:translateY(16px) scale(0.9);transition:opacity var(--dur-base) var(--ease-out),transform var(--dur-base) var(--ease-out);z-index:997;border:none;}
#topBtn:hover{transform:translateY(-2px) scale(1.05);box-shadow:var(--shadow-glow);}
#topBtn.show{opacity:1;transform:translateY(0) scale(1);}

/* Skeleton */
.skeleton{background:linear-gradient(90deg,var(--bg-card) 25%,var(--bg-card-hover) 50%,var(--bg-card) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-sm);}
@keyframes shimmer{0%{background-position:200% 0;}100%{background-position:-200% 0;}}
.skeleton-card{border-radius:var(--radius-lg);height:280px;margin-bottom:var(--space-lg);}
.skeleton-line{height:16px;margin-bottom:var(--space-sm);}
.skeleton-line--short{width:60%;}
.skeleton-line--medium{width:80%;}

/* Tag */
.tag{display:inline-flex;align-items:center;gap:4px;font-size:var(--text-xs);font-weight:600;letter-spacing:0.04em;text-transform:uppercase;padding:4px 10px;border-radius:var(--radius-pill);border:1px solid transparent;}
.tag.android{background:rgba(0,200,83,0.12);color:var(--accent-android);border-color:rgba(0,200,83,0.25);}
.tag.ai{background:rgba(99,102,241,0.12);color:#a5b4fc;border-color:rgba(99,102,241,0.25);}

/* Divider */
.divider{height:1px;background:var(--border);margin:var(--space-xl) 0;}

/* Highlight */
mark.search-highlight{background:rgba(99,102,241,0.25);color:var(--text-primary);border-radius:2px;padding:0 2px;}

/* No results */
.no-results{text-align:center;color:var(--text-muted);font-size:var(--text-lg);padding:var(--space-3xl) 0;}
.no-results__icon{font-size:3rem;display:block;margin-bottom:var(--space-md);}