:root {
    --bg: #030712;
    --accent: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.4);
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --card-radius: 24px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.6;
}

.ambient-glow {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: -1;
    background: radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.12), transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.08), transparent 40%);
    filter: blur(80px);
}

/* Header */
header {
    width: 100%; max-width: 1200px; margin: 0 auto;
    padding: 24px; display: flex; justify-content: space-between; align-items: center;
    position: sticky; top: 0; z-index: 1000;
    background: rgba(3, 7, 18, 0.8); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-weight: 800; font-size: 1.2rem; letter-spacing: -0.8px;
    display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit;
}
.logo span { color: var(--accent); text-shadow: 0 0 15px var(--accent-glow); }

.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); text-decoration: none; transition: 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text-main); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-main);
    transition: 0.3s;
}

.lang-toggle {
    display: flex; background: rgba(0,0,0,0.4); border: 1px solid var(--glass-border);
    border-radius: 99px; padding: 3px;
}
.lang-opt {
    padding: 6px 14px; font-size: 0.75rem; font-weight: 700; cursor: pointer;
    border-radius: 99px; transition: 0.2s; color: var(--text-muted); text-decoration: none;
}
.lang-opt.active { background: var(--accent); color: white; box-shadow: 0 0 12px var(--accent-glow); }

/* Dropdown */
.dropdown { position: relative; }
.dropdown-content {
    position: absolute; top: 100%; right: 0; min-width: 240px;
    background: rgba(3, 7, 18, 0.95); backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border); border-radius: 16px;
    padding: 10px; opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: 0.3s; z-index: 1001;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}
.dropdown:hover .dropdown-content { opacity: 1; visibility: visible; transform: translateY(5px); }
.dropdown-item {
    display: flex; align-items: center; gap: 12px; padding: 12px;
    color: var(--text-muted); text-decoration: none; font-size: 0.85rem; font-weight: 600;
    border-radius: 10px; transition: 0.2s;
}
.dropdown-item:hover { background: rgba(255,255,255,0.05); color: var(--text-main); }
.dropdown-item i { font-style: normal; font-size: 1.1rem; }

/* Hero */
.hero { padding: 80px 24px 40px; text-align: center; max-width: 900px; margin: 0 auto; }
.hero h1 {
    font-size: clamp(2.2rem, 7vw, 4rem); font-weight: 800; line-height: 1.1; letter-spacing: -1.5px;
    margin-bottom: 20px; background: linear-gradient(180deg, #fff 0%, #a1a1aa 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* Main Card */
.tool-wrapper { max-width: 1000px; margin: 0 auto; padding: 0 24px 80px; }
.glass-card {
    background: var(--glass); backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border); border-radius: var(--card-radius);
    padding: 40px; box-shadow: 0 30px 60px -12px rgba(0,0,0,0.6);
    display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px;
}
@media (max-width: 850px) { .glass-card { grid-template-columns: 1fr; padding: 24px; } }

.input-group { margin-bottom: 20px; }
.input-group label { display: block; font-size: 0.7rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 10px; }

.modern-field {
    width: 100%; background: rgba(0,0,0,0.2); border: 1px solid var(--glass-border);
    border-radius: 12px; padding: 14px; color: white; font-size: 1rem; outline: none; transition: 0.2s;
    font-family: inherit;
}
.modern-field:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-glow); }

.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.pill-select {
    display: flex; background: rgba(0,0,0,0.3); border: 1px solid var(--glass-border);
    border-radius: 12px; padding: 4px; gap: 4px;
}
.pill {
    flex: 1; padding: 8px; text-align: center; font-size: 0.75rem; font-weight: 700;
    border-radius: 8px; cursor: pointer; transition: 0.2s; color: var(--text-muted);
}
.pill.active { background: var(--accent); color: white; box-shadow: 0 0 12px var(--accent-glow); }

/* Dashboard Readout */
.readout {
    background: rgba(0,0,0,0.3); border: 1px solid var(--glass-border);
    border-radius: 20px; padding: 30px; display: flex; flex-direction: column; justify-content: space-between;
}
.readout-item { margin-bottom: 20px; }
.readout-label { font-size: 0.65rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.readout-val { font-family: 'JetBrains Mono', monospace; font-size: 2.2rem; font-weight: 700; color: var(--success); display: block; }
.readout-val.blue { color: var(--accent); text-shadow: 0 0 15px var(--accent-glow); }
.readout-val.warning { color: var(--warning); }
.readout-val.danger { color: var(--danger); }

.status-box {
    display: flex; align-items: center; gap: 8px; font-size: 0.75rem; font-weight: 700;
    background: rgba(255,255,255,0.05); padding: 10px; border-radius: 12px; border: 1px solid var(--glass-border);
}
.status-dot { width: 8px; height: 8px; border-radius: 50%; }

/* SEO Content Area */
.content-area { max-width: 900px; margin: 0 auto 100px; padding: 0 24px; }
.content-block { background: rgba(255,255,255,0.02); border: 1px solid var(--glass-border); border-radius: 20px; padding: 40px; margin-bottom: 24px; }
.content-block h2 { font-size: 1.6rem; margin-bottom: 20px; font-weight: 800; border-bottom: 1px solid var(--glass-border); padding-bottom: 15px; }
.content-block p { font-size: 0.95rem; color: var(--text-muted); margin-bottom: 20px; }
.content-block ul, .content-block ol { padding-left: 20px; color: var(--text-muted); font-size: 0.95rem; }
.content-block li { margin-bottom: 10px; }

.formula-box { background: rgba(0,0,0,0.3); border: 1px solid var(--accent); border-radius: 12px; padding: 20px; text-align: center; font-family: 'JetBrains Mono', monospace; font-size: 1.2rem; margin: 20px 0; color: var(--accent); }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--glass-border); padding: 20px 0; cursor: pointer; }
.faq-q { font-weight: 700; display: flex; justify-content: space-between; align-items: center; font-size: 0.95rem; }
.faq-a { display: none; padding-top: 15px; color: var(--text-muted); font-size: 0.9rem; }
.faq-item.active .faq-a { display: block; }

/* Tools Grid */
.section-header { text-align: center; margin-bottom: 40px; padding: 0 24px; }
.section-header h2 { font-size: 2rem; font-weight: 800; }
.tools-grid { max-width: 1100px; margin: 0 auto 100px; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; padding: 0 24px; }
.tool-card {
    background: var(--glass); border: 1px solid var(--glass-border); border-radius: 20px; padding: 24px;
    text-decoration: none; color: inherit; transition: 0.3s;
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-5px); background: rgba(255,255,255,0.06); }
.tool-icon { font-size: 1.8rem; margin-bottom: 12px; display: block; }
.tool-name { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.tool-desc { font-size: 0.8rem; color: var(--text-muted); }

/* Footer */
footer { background: #020617; border-top: 1px solid var(--glass-border); padding: 80px 24px 40px; }
.footer-grid { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 60px; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; } }
.footer-col h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 20px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: 0.2s; }
.footer-col a:hover { color: white; }

/* Mobile Styles */
@media (max-width: 768px) {
    header { padding: 16px 20px; }
    .nav-toggle { display: flex !important; }
    .nav-links {
        position: fixed !important;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(3, 7, 18, 0.98) !important;
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        padding: 40px;
        transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-left: 1px solid var(--glass-border);
        box-shadow: -10px 0 30px rgba(0,0,0,0.5);
        z-index: 2000;
        display: flex !important;
    }
    .nav-links.active { right: 0 !important; }
    .nav-links a { font-size: 1.1rem; width: 100%; padding: 12px 0; border-bottom: 1px solid var(--glass-border); color: var(--text-main) !important; }
    .dropdown-content { position: static !important; opacity: 1 !important; visibility: visible !important; transform: none !important; background: transparent !important; border: none !important; padding: 0 0 0 20px !important; box-shadow: none !important; display: none; }
    .dropdown.active .dropdown-content { display: block !important; }
    .lang-toggle { margin-top: 20px; }
    
    .hero h1 { font-size: 2.5rem; }
    .glass-card { padding: 24px; }
}