/* MathSolver - Linear-inspired: Dark panel table */
:root {
    --primary: #5e6ad2;
    --primary-light: #7170ff;
    --accent: #27a644;
    --bg: #010102;
    --bg-card: #0f1011;
    --bg-hover: #191a1b;
    --text: #f7f8f8;
    --text-secondary: #8a8f98;
    --border: rgba(255,255,255,0.06);
    --radius: 8px;
    --gradient: linear-gradient(135deg, #5e6ad2, #7170ff);
    --shadow-card: none;
    --shadow-hover: rgba(94,106,210,0.1) 0px 0px 0px 1px;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
.logo-icon,.tool-icon,.feature-icon,.footer-icon{display:inline-block;vertical-align:middle}
a{color:var(--primary-light);text-decoration:none;transition:color 0.2s}a:hover{color:#828fff}
.container{max-width:1100px;margin:0 auto;padding:0 24px}
header{position:sticky;top:0;z-index:100;background:rgba(1,1,2,0.85);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
header nav{display:flex;align-items:center;justify-content:space-between;padding:12px 24px}
.logo{display:flex;align-items:center;gap:8px;font-size:1.2rem;font-weight:600}.logo-icon{width:22px;height:22px;color:var(--primary-light)}
.nav-links{display:flex;list-style:none;gap:24px}.nav-links a{color:var(--text-secondary);font-weight:500;font-size:0.85rem}.nav-links a:hover{color:var(--text)}
.hero{text-align:left;padding:60px 0 20px;background:radial-gradient(ellipse at 30% 0%, rgba(94,106,210,0.08), transparent 50%)}
.hero h1{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:700;margin-bottom:10px;letter-spacing:-0.02em}
.gradient-text{background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-subtitle{color:var(--text-secondary);max-width:500px;font-size:0.95rem;line-height:1.5;margin-bottom:16px}
.search-bar{max-width:400px}.search-bar input{width:100%;padding:10px 16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);color:var(--text);font-size:0.9rem;outline:none;transition:all 0.2s}.search-bar input:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(94,106,210,0.15)}
.section-title{font-size:0.7rem;font-weight:600;margin:36px 0 12px;text-transform:uppercase;letter-spacing:0.1em;color:var(--text-secondary)}
.tools-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;padding-bottom:48px;background:var(--border);border-radius:var(--radius);overflow:hidden}
.tool-card{display:flex;align-items:center;gap:16px;background:var(--bg-card);border:none;border-radius:0;padding:18px 24px;transition:all 0.15s}
.tool-card:hover{background:var(--bg-hover)}
.tool-icon{width:22px;height:22px;flex-shrink:0;color:var(--primary-light);stroke-width:1.5}.tool-card h3{font-size:0.9rem;margin-bottom:2px;font-weight:600}.tool-card p{font-size:0.75rem;color:var(--text-secondary);line-height:1.4}
.tool-card.hidden{display:none}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
.feature{text-align:center;padding:16px;background:var(--bg-card);border-radius:var(--radius);border:1px solid var(--border)}
.feature-icon{width:22px;height:22px;margin-bottom:8px;color:var(--primary-light);stroke-width:1.5}.feature h3{font-size:0.8rem;margin-bottom:3px;font-weight:600}.feature p{font-size:0.7rem;color:var(--text-secondary)}
.ad-container{min-height:80px;margin:16px auto;display:flex;align-items:center;justify-content:center}
footer{margin-top:40px;border-top:1px solid var(--border);padding:32px 0 16px;background:#08090a}
.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:24px;margin-bottom:24px}
.footer-col h4{font-size:0.85rem;margin-bottom:10px;font-weight:600;color:var(--text);display:flex;align-items:center;gap:6px}.footer-icon{width:14px;height:14px;color:var(--primary-light)}
.footer-col p,.footer-col a{font-size:0.8rem;color:var(--text-secondary)}.footer-col ul{list-style:none}.footer-col li{margin-bottom:6px}
.footer-bottom{text-align:center;padding-top:16px;border-top:1px solid var(--border);color:var(--text-secondary);font-size:0.75rem}
.legal-page,.tool-page{max-width:800px;margin:40px auto;padding:0 24px}.legal-page h1{font-size:1.8rem;margin-bottom:20px;font-weight:700}.legal-page h2{font-size:1.15rem;margin:24px 0 10px;font-weight:600}.legal-page p{color:var(--text-secondary);line-height:1.7;margin-bottom:10px}
.content-section{margin-top:32px;padding-top:32px;border-top:1px solid var(--border)}.content-section h2{font-size:1.2rem;margin:20px 0 10px;font-weight:600}.content-section p{color:var(--text-secondary);line-height:1.7;margin-bottom:10px}.content-section ul{color:var(--text-secondary);padding-left:20px;margin-bottom:10px}.content-section li{margin-bottom:4px}
.cta-box{margin:32px 0;padding:24px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);text-align:center}
.cta-btn{display:inline-block;padding:12px 28px;border-radius:var(--radius);color:white;font-weight:600;background:var(--gradient);text-decoration:none;transition:opacity 0.2s}.cta-btn:hover{opacity:0.9}
@media(max-width:768px){.nav-links{display:none}.tools-grid{grid-template-columns:1fr}.features-grid{grid-template-columns:repeat(2,1fr)}}