:root {
    --bg-dark: #0f172a;
    --surface: rgba(30, 41, 59, 0.7);
    --surface-light: rgba(51, 65, 85, 0.5);
    --primary: #38bdf8;
    --primary-glow: rgba(56, 189, 248, 0.3);
    --secondary: #818cf8;
    --accent: #c084fc;
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 24px;
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    overflow-x: hidden;
    background-image: radial-gradient(circle at 50% -20%, #1e293b 0%, #0f172a 100%);
    min-height: 100vh;
    line-height: 1.6;
}

h1,
h2,
h3,
.brand {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
nav {
    backdrop-filter: blur(12px);
    background: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid var(--glass-border);
    padding: 1.25rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-dim);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--primary);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 99px;
    color: #fff;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
    text-decoration: none;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: var(--primary);
    color: var(--primary);
}

.back-btn i {
    font-size: 0.8rem;
}

/* Hero Section */
.hero {
    padding: 8rem 0 6rem;
    text-align: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    background: var(--primary-glow);
    filter: blur(120px);
    z-index: -1;
    border-radius: 50%;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(to bottom, #fff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-dim);
    max-width: 700px;
    margin: 0 auto 2.5rem;
}

.cta-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: 1rem 2.5rem;
    border-radius: 99px;
    color: #0f172a;
    font-weight: 700;
    display: inline-block;
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.2);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(56, 189, 248, 0.4);
}

/* Tools Grid */
.categories,
.grid {
    padding: 4rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.category-card,
.card {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.category-card:hover,
.card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.category-card i,
.card i {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.category-card h3,
.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.category-card p,
.card p {
    color: var(--text-dim);
    font-size: 0.95rem;
}

/* Calculator & Forms UI */
.calculator-container {
    max-width: 800px;
    margin: 4rem auto;
    background: var(--surface);
    padding: 3rem;
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dim);
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 1rem;
    background: var(--surface-light);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    transition: var(--transition);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(56, 189, 248, 0.05);
}

.calc-btn {
    width: 100%;
    padding: 1.25rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    border-radius: 12px;
    color: #0f172a;
    font-weight: 700;
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
}

.calc-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.3);
}

.result-box {
    margin-top: 2rem;
    padding: 2.5rem;
    background: rgba(56, 189, 248, 0.1);
    border-radius: var(--radius);
    border: 1px solid var(--primary);
    text-align: center;
}

.result-value {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary);
    font-family: 'Outfit';
    margin: 1rem 0;
}

/* Cookie Consent */
#cookie-consent {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    right: 2rem;
    max-width: 500px;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: 2rem;
    border-radius: 24px;
    z-index: 2000;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    display: none;
}

.consent-btns {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-accept {
    background: var(--primary);
    color: #0f172a;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    border: none;
    font-weight: 600;
    cursor: pointer;
}

.btn-decline {
    background: transparent;
    color: var(--text-dim);
    padding: 0.75rem 2rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    cursor: pointer;
}

/* Footer & Global Sections */
footer {
    padding: 6rem 0 4rem;
    border-top: 1px solid var(--glass-border);
    margin-top: 8rem;
    background: rgba(15, 23, 42, 0.5);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand {
    grid-column: span 2;
}

.footer-column h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #fff;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.legal-links {
    display: flex;
    gap: 1.5rem;
}

.legal-links a {
    color: var(--text-dim);
    font-size: 0.85rem;
}

.legal-links a:hover {
    color: #fff;
}

/* Ad Slot Styles */
.ad-slot {
    margin: 4rem auto;
    max-width: 728px;
    min-height: 90px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px dashed var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    font-size: 0.8rem;
    border-radius: 12px;
}

/* SEO Content */
.seo-content {
    max-width: 800px;
    margin: 4rem auto;
    color: var(--text-dim);
}

.seo-content h1,
.seo-content h2 {
    color: #fff;
    margin: 3rem 0 1.5rem;
}

.seo-content p {
    margin-bottom: 1.5rem;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
    }

    .footer-brand {
        grid-column: span 1;
    }

    .calculator-container {
        padding: 2rem 1.5rem;
    }

    #cookie-consent {
        left: 1rem;
        right: 1rem;
    }
}