/* ══════════════════════════════════════
   CompoundCalculator.site — Design System
   Purple/Violet Wealth Theme
   ══════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;600;700&display=swap');
:root{--bg:#F5F3FF;--bg-card:#fff;--bg-input:#EDE9FE;--bg-hero:linear-gradient(135deg,#1E1145 0%,#2E1065 50%,#3B0764 100%);--bg-result:linear-gradient(135deg,#7C3AED 0%,#5B21B6 100%);--text-primary:#1E1145;--text-secondary:#5B5680;--text-muted:#8781A5;--text-on-dark:#F5F3FF;--purple:#7C3AED;--purple-light:#C4B5FD;--purple-dark:#5B21B6;--purple-bg:rgba(124,58,237,.06);--green:#16A34A;--blue:#3B82F6;--orange:#F59E0B;--red:#EF4444;--border:#DDD6FE;--border-focus:#7C3AED;--shadow-sm:0 1px 3px rgba(30,17,69,.05);--shadow-md:0 4px 14px rgba(30,17,69,.08);--shadow-lg:0 8px 32px rgba(30,17,69,.12);--shadow-glow:0 0 0 3px rgba(124,58,237,.15);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--max-width:1200px;--nav-height:60px;--font-body:'Inter',-apple-system,sans-serif;--font-mono:'JetBrains Mono',monospace}
*,*::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-primary);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--purple-dark);text-decoration:none}a:hover{text-decoration:underline}button{cursor:pointer;font-family:inherit}
.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);height:var(--nav-height);display:flex;align-items:center;padding:0 24px}
.nav-inner{max-width:var(--max-width);width:100%;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:1.15rem}
.brand-compound{color:var(--text-primary)}.brand-calc{color:var(--purple)}
.nav-links{display:flex;gap:6px}.nav-links a{padding:6px 14px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:500;color:var(--text-secondary);text-decoration:none;transition:.2s}
.nav-links a:hover,.nav-links a.active{background:var(--bg-input);color:var(--purple-dark)}
.hamburger{display:none;background:none;border:none;padding:6px;color:var(--text-primary)}.hamburger svg{width:24px;height:24px}
.mobile-menu{display:none;position:fixed;inset:0;z-index:200;background:rgba(30,17,69,.5)}.mobile-menu.open{display:block}
.mobile-menu-panel{position:absolute;right:0;top:0;bottom:0;width:280px;background:var(--bg-card);padding:20px;display:flex;flex-direction:column;gap:4px;animation:slideIn .25s ease}
@keyframes slideIn{from{transform:translateX(100%)}}
.mobile-menu-close{display:flex;justify-content:flex-end;margin-bottom:12px}.mobile-menu-close button{background:none;border:none;padding:4px}
.mobile-menu-panel a{display:block;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text-primary);font-weight:500;text-decoration:none}
.page-hero{background:var(--bg-hero);padding:48px 24px 40px;text-align:center;position:relative;overflow:hidden}
.page-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 40%,rgba(124,58,237,.2) 0%,transparent 60%)}
.page-hero h1{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;color:var(--text-on-dark);margin-bottom:8px;position:relative}
.page-hero h1 span{color:var(--purple-light)}.page-hero p{color:rgba(245,243,255,.7);max-width:600px;margin:0 auto;font-size:1.05rem;position:relative}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}
.calc-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:-40px auto 40px;max-width:1000px;padding:0 24px;position:relative;z-index:1}
.card{background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-sm);overflow:hidden}
.card-header{padding:16px 20px;font-weight:600;font-size:.95rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}
.card-header svg{width:20px;height:20px;color:var(--purple)}.card-body{padding:20px}
.input-group{margin-bottom:16px}.input-label{display:block;font-size:.82rem;font-weight:500;color:var(--text-secondary);margin-bottom:6px}
.input-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.input-field{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-input);font-size:.95rem;color:var(--text-primary);transition:.2s;outline:none}
.input-field:focus{border-color:var(--purple);box-shadow:var(--shadow-glow);background:#fff}
.select-field{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-input);font-size:.95rem;outline:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:600;border:none;transition:.2s}
.btn-primary{background:var(--purple);color:white}.btn-primary:hover{background:var(--purple-dark);transform:translateY(-1px)}
.result-hero{background:var(--bg-result);border:none;color:white;text-align:center;padding:28px 20px;border-radius:var(--radius-lg);box-shadow:0 8px 32px rgba(124,58,237,.25)}
.result-hero .result-label{font-size:.82rem;text-transform:uppercase;letter-spacing:1.5px;opacity:.85;margin-bottom:4px}
.result-hero .result-value{font-size:2.8rem;font-weight:800;font-family:var(--font-mono);line-height:1.1}
.result-hero .result-unit{font-size:1rem;opacity:.8;margin-top:2px}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.result-item{background:var(--bg-input);padding:14px 16px;border-radius:var(--radius-md);border:1px solid var(--border)}
.result-item .ri-label{font-size:.72rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:2px}
.result-item .ri-value{font-size:1.2rem;font-weight:700;font-family:var(--font-mono)}
.result-item .ri-value.green{color:#16A34A}.result-item .ri-value.blue{color:#3B82F6}.result-item .ri-value.orange{color:#F59E0B}.result-item .ri-value.purple{color:var(--purple)}
.summary-table{width:100%;border-collapse:collapse}.summary-table th,.summary-table td{padding:10px 12px;text-align:left;font-size:.85rem;border-bottom:1px solid var(--border)}
.summary-table th{font-weight:600;color:var(--text-secondary);font-size:.75rem;text-transform:uppercase;letter-spacing:.5px}
.summary-table td{font-family:var(--font-mono);font-size:.88rem}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:24px 0 40px}
.calc-link{display:flex;align-items:center;gap:14px;padding:18px 20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);text-decoration:none;transition:.25s}
.calc-link:hover{border-color:var(--purple-light);box-shadow:var(--shadow-md);transform:translateY(-2px);text-decoration:none}
.calc-link svg{width:36px;height:36px;color:var(--purple);flex-shrink:0}
.calc-link strong{display:block;font-size:.92rem}.calc-link span{font-size:.78rem;color:var(--text-muted)}
.faq-section{margin:40px 0}.faq-section h2{font-size:1.4rem;margin-bottom:20px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:8px;overflow:hidden;background:var(--bg-card);cursor:pointer}
.faq-q{padding:16px 20px;font-weight:600;font-size:.92rem;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:'+';font-size:1.3rem;color:var(--purple);font-weight:300;transition:.2s}.faq-item.open .faq-q::after{content:'−'}
.faq-a{padding:0 20px;max-height:0;overflow:hidden;color:var(--text-secondary);font-size:.88rem;line-height:1.7;transition:.3s}
.faq-item.open .faq-a{max-height:400px;padding:0 20px 16px}
.content-section{max-width:800px;margin:40px auto;padding:0 24px}
.content-section h2{font-size:1.3rem;margin:32px 0 12px}.content-section h3{font-size:1.1rem;margin:24px 0 8px}
.content-section p{margin-bottom:16px;color:var(--text-secondary);font-size:.95rem;line-height:1.8}
.content-section ul,.content-section ol{margin:12px 0 16px 24px;color:var(--text-secondary)}.content-section li{margin-bottom:8px;font-size:.95rem;line-height:1.7}
.footer{background:var(--text-primary);color:rgba(245,243,255,.7);padding:32px 24px;margin-top:60px;font-size:.85rem;text-align:center}
.footer strong{color:var(--text-on-dark)}.footer-links{margin-top:12px;display:flex;justify-content:center;flex-wrap:wrap;gap:8px}
.footer-links a{color:rgba(245,243,255,.5)}.footer-links a:hover{color:var(--purple-light)}
@media(max-width:768px){.nav-links{display:none}.hamburger{display:block}.calc-layout{grid-template-columns:1fr;margin-top:-24px}.page-hero{padding:36px 20px 60px}.result-grid{grid-template-columns:1fr}.input-row{grid-template-columns:1fr}.result-hero .result-value{font-size:2.2rem}}