/* Modern Tech-Heavy Design System */
:root {
    /* Base Colors */
    --bg-dark: #050507;
    --bg-card: #0F1116;
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;

    /* Google Flow / Tech Gradients */
    --accent-primary: #4285F4;
    /* Google Blue */
    --accent-secondary: #DB4437;
    /* Google Red */
    --accent-tertiary: #F4B400;
    /* Google Yellow */
    --accent-quaternary: #0F9D58;
    /* Google Green */

    --gradient-flow: linear-gradient(135deg, #4285F4 0%, #9B51E0 50%, #DB4437 100%);
    --gradient-glow: linear-gradient(135deg, rgba(66, 133, 244, 0.2) 0%, rgba(155, 81, 224, 0.2) 100%);

    /* Effects */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --blur: blur(20px);

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography Utility */
.gradient-text {
    background: var(--gradient-flow);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Sticky Glass Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 5, 7, 0.8);
    backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--glass-border);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.2rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-nav {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.5rem 1.2rem;
    border-radius: 99px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.btn-nav:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulseGlow {
    0% {
        box-shadow: 0 0 20px rgba(66, 133, 244, 0.3);
    }

    50% {
        box-shadow: 0 0 40px rgba(155, 81, 224, 0.5);
    }

    100% {
        box-shadow: 0 0 20px rgba(66, 133, 244, 0.3);
    }
}

/* Hero Section */
.hero {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
    position: relative;
    overflow: hidden;
}

/* Ambient Background Glow */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(66, 133, 244, 0.15) 0%, rgba(5, 5, 7, 0) 70%);
    z-index: -1;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
    animation: fadeUp 0.8s ease-out;
}

.subtitle {
    font-size: clamp(1.1rem, 4vw, 1.3rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 3rem;
    animation: fadeUp 0.8s ease-out 0.2s backwards;
}

.cta-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    animation: fadeUp 0.8s ease-out 0.4s backwards;
}

.btn-primary {
    background: var(--gradient-flow);
    color: white;
    padding: 1.1rem 2.8rem;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    box-shadow: 0 10px 30px rgba(66, 133, 244, 0.3);
    transition: var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 20px 40px rgba(155, 81, 224, 0.4);
}

.meta-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    gap: 1.5rem;
    opacity: 0.8;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Feature Grid */
.features-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.chip {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 0.4rem 1rem;
    border-radius: 99px;
    font-size: 0.85rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 1rem;
    display: inline-block;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(66, 133, 244, 0.4);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-glow);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 0;
}

.card:hover::before {
    opacity: 0.1;
}

.card-content {
    position: relative;
    z-index: 1;
}

.icon-box {
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
}

.card p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* FAQ Section */
.faq-section {
    padding: 6rem 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.accordion {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.accordion-item {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
}

details {
    width: 100%;
}

summary {
    padding: 1.5rem;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    font-size: 1.1rem;
    transition: color 0.2s;
}

summary::-webkit-details-marker {
    display: none;
}

summary:hover {
    color: var(--accent-primary);
}

summary::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
}

details[open] summary::after {
    content: '−';
}

.answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--glass-border);
    margin-top: 0.5rem;
    padding-top: 1rem;
}

/* Footer */
footer {
    padding: 4rem 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-secondary);
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
    margin: 0 1rem;
    transition: color 0.2s;
}

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

/* Mobile Adjustments */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

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

/* Scroll Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}