:root {
    --primary: #F5A623;
    --primary-dark: #E0961F;
    --secondary: #333333;
    --text: #2D3748;
    --light: #F7FAFC;
    --white: #FFFFFF;
    --border: #E2E8F0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --font: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font);
    color: var(--text);
    background-color: var(--light);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--white);
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 24px;
    font-weight: 800;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 25px;
    font-weight: 500;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #333 0%, #1a1a1a 100%);
    padding: 80px 0;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 48px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.iframe-container {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    height: 550px;
}

/* Tool Section */
.tool-section {
    margin-top: -60px;
    position: relative;
    z-index: 10;
}

.tool-card {
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    font-size: 14px;
}

.form-group input, .form-group select {
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: inherit;
}

/* Directory Grid */
.directory-section {
    padding: 60px 0;
}

.section-title {
    margin-bottom: 40px;
    text-align: center;
}

.grid-silos {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.silo-card {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: 0.3s;
}

.silo-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

/* Content Sections */
.rich-text {
    padding: 60px 0;
    background: var(--white);
}

.rich-text h2 {
    margin-bottom: 24px;
}

.rich-text p {
    margin-bottom: 16px;
    color: #4A5568;
}

/* Footer */
footer {
    background: var(--secondary);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 40px;
    text-align: center;
    font-size: 14px;
    opacity: 0.7;
}

/* Reveal Animation */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Mobile responsive */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }
    .hero-content {
        text-align: center;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .hero-content h1 {
        font-size: 32px;
    }
    .nav-links {
        display: none;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}