:root {
    --primary: #007AFF;
    --primary-dark: #0056B3;
    --primary-light: #E6F4FE;
    --secondary: #5856D6;
    --text-dark: #1D1D1F;
    --text-light: #86868B;
    --bg-white: #FFFFFF;
    --bg-gray: #F5F5F7;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--bg-white);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header */
header {
    padding: 20px 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
    padding: 15px 80px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-container img {
    height: 40px;
}

.logo-container span {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
}

nav ul li a:hover {
    color: var(--primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    padding: 12px 24px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,122,255,0.3);
}

/* Hero Section */
.hero {
    padding: 180px 80px 100px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, #F9FBFF 0%, #FFFFFF 100%);
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-content h1 {
    font-size: 64px;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--text-dark);
    letter-spacing: -2px;
}

.hero-content h1 span {
    color: var(--primary);
}

.hero-content p {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.hero-image img {
    max-width: 90%;
    border-radius: 30px;
    box-shadow: var(--shadow);
    transform: perspective(1000px) rotateY(-5deg);
}

/* Features */
.section {
    padding: 100px 80px;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 15px;
}

.section-title p {
    color: var(--text-light);
    font-size: 18px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid #F0F0F0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-light);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: var(--primary);
    font-size: 24px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-light);
}

/* Categories */
.categories-container {
    background: var(--bg-gray);
    border-radius: 40px;
    padding: 60px;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.category-item {
    background: white;
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.category-item:hover {
    background: var(--primary);
    color: white;
}

.category-item:hover i {
    color: white;
}

.category-item i {
    font-size: 30px;
    margin-bottom: 10px;
    color: var(--primary);
}

/* Footer */
footer {
    background: var(--text-dark);
    color: white;
    padding: 80px 80px 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-info h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.footer-links h4 {
    margin-bottom: 25px;
    font-size: 18px;
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: #86868B;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 40px;
    text-align: center;
    color: #86868B;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
}

@media (max-width: 1024px) {
    header, .hero, .section, footer {
        padding-left: 40px;
        padding-right: 40px;
    }
    .hero-content h1 {
        font-size: 48px;
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        padding: 20px 40px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        display: none;
    }

    nav.active {
        display: block;
    }

    nav ul {
        flex-direction: column;
        gap: 20px;
    }

    header .btn-primary {
        display: none; /* Hide download btn on mobile header to save space */
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
    }
    
    .hero-content {
        margin-bottom: 60px;
        max-width: 100%;
    }

    .hero-content h1 {
        font-size: 40px;
        letter-spacing: -1px;
    }

    .hero-image {
        width: 100%;
    }

    .hero-image img {
        transform: none;
        max-width: 100%;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .categories-container {
        padding: 30px;
    }

    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    #providers {
        margin: 0 20px !important;
    }

    #providers > div {
        flex-direction: column;
        text-align: center;
        padding: 40px 20px !important;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}