@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #2b6cb0;
    --primary-accent: #60a5fa;
    --surface: #ffffff;
    --surface-alt: #eff4fb;
    --surface-soft: #f7faff;
    --text-primary: #1c2539;
    --text-secondary: #5c6c84;
    --border-color: #d7e3f5;
    --shadow-soft: 0 24px 48px rgba(43, 108, 176, 0.12);
    --font-family: 'Poppins', sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--surface-alt);
    color: var(--text-primary);
}

main {
    padding-top: 80px;
}

.header-light {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    box-shadow: 0 12px 30px rgba(15, 34, 65, 0.08);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.logo-link {
    margin-right: 2.5rem;
}

.logo-wordmark {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.18rem;
    color: var(--primary-color);
    text-transform: uppercase;
    display: inline-block;
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary) !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

.nav-link.active-link {
    color: var(--primary-color) !important;
    font-weight: 600;
}

.btn-outline-light {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: transparent;
    transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.btn-outline-light:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-accent));
    color: #ffffff !important;
    box-shadow: 0 12px 24px rgba(43, 108, 176, 0.18);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-accent));
    border: none;
    box-shadow: 0 12px 24px rgba(43, 108, 176, 0.22);
}

.btn-primary:hover {
    opacity: 0.95;
    box-shadow: 0 16px 32px rgba(43, 108, 176, 0.24);
}

#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 0;
}

.hero {
    padding: 120px 0;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #ebf1ff 0%, #fdfdff 65%, #eff5ff 100%);
    color: var(--text-primary);
}

.hero .container {
    position: relative;
    z-index: 1;
}

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

.hero p {
    color: var(--text-secondary);
}

.card {
    border: 1px solid var(--border-color);
    background-color: var(--surface);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: 16px;
    color: var(--text-primary);
    box-shadow: 0 8px 24px rgba(28, 37, 57, 0.05);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-soft);
}

.card-title {
    color: var(--primary-color);
}

.product-card {
    display: flex;
    align-items: center;
    background-color: var(--surface);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(28, 37, 57, 0.05);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-soft);
    border-color: rgba(43, 108, 176, 0.35);
}

.product-card .icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-right: 2rem;
}

.light-section {
    background-color: var(--surface-soft);
}

.roi-calculator {
    background-color: var(--surface);
    padding: 50px 0;
    border-radius: 20px;
    box-shadow: 0 12px 36px rgba(28, 37, 57, 0.08);
}

.ai-impact-section {
    background-color: var(--surface);
    border-radius: 20px;
    box-shadow: 0 8px 28px rgba(28, 37, 57, 0.06);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.form-label {
    color: var(--text-secondary);
}

.range-value {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--primary-color);
}

#savings-display {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
    margin-top: 20px;
}

footer {
    background-color: #f1f5ff !important;
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-heading {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
    padding-left: 0;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* AI comparison visuals */
.ai-comparison-section {
    padding: 3rem;
    background: linear-gradient(135deg, #f9fbff 0%, #eef4ff 100%);
    border-radius: 24px;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    box-shadow: 0 18px 40px rgba(43, 108, 176, 0.1);
}

.ai-comparison-section::after {
    content: "";
    position: absolute;
    top: -40px;
    right: -60px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.35) 0%, rgba(96, 165, 250, 0) 65%);
    filter: blur(2px);
    animation: pulseGlow 6s ease-in-out infinite;
}

.ai-comparison-copy {
    position: relative;
    z-index: 1;
}

.ai-comparison-copy h2 {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.ai-comparison-copy p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.comparison-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comparison-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.comparison-list li strong {
    color: var(--text-primary);
}

.comparison-visual {
    position: relative;
    z-index: 1;
    background-color: rgba(255, 255, 255, 0.92);
    border-radius: 20px;
    border: 1px solid rgba(43, 108, 176, 0.12);
    padding: 2rem;
    box-shadow: 0 16px 36px rgba(43, 108, 176, 0.12);
    overflow: hidden;
}

.comparison-visual::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.15), transparent 60%);
    opacity: 0.8;
    pointer-events: none;
}

.metric-track {
    position: relative;
    margin-bottom: 1.5rem;
}

.metric-track:last-child {
    margin-bottom: 0;
}

.metric-heading {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.metric-heading span:first-child {
    font-weight: 600;
    color: var(--text-primary);
}

.comparison-bar {
    background: rgba(231, 239, 255, 0.9);
    border-radius: 999px;
    height: 12px;
    overflow: hidden;
    position: relative;
}

.comparison-bar span {
    display: block;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-accent));
    transform-origin: left;
    transform: scaleX(var(--target, 0.8));
    border-radius: inherit;
    position: relative;
}

.comparison-bar span::after {
    content: "";
    position: absolute;
    top: 0;
    left: -30%;
    width: 40%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: sheen 3s linear infinite;
}

.comparison-delta {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-top: 0.75rem;
}

@keyframes pulseGlow {
    0% {
        transform: scale(0.85);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
    100% {
        transform: scale(0.9);
        opacity: 0.6;
    }
}

@keyframes sheen {
    0% {
        left: -40%;
    }
    100% {
        left: 110%;
    }
}

.text-secondary {
    color: var(--text-secondary) !important;
}