/* Auralith OMNI — Landing Page Styles */
/* Premium, clean design inspired by contextual.ai */
/* Color palette matched to dashboard: White/Slate/Blue */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ===== RESET & TOKENS ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --white: #FFFFFF;
    --slate-50: #F8FAFC;
    --slate-100: #F1F5F9;
    --slate-200: #E2E8F0;
    --slate-300: #CBD5E1;
    --slate-400: #94A3B8;
    --slate-500: #64748B;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1E293B;
    --slate-900: #0F172A;
    --slate-950: #020617;
    --blue-400: #60A5FA;
    --blue-500: #3B82F6;
    --blue-600: #2563EB;
    --blue-700: #1D4ED8;
    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
    --gradient-accent: linear-gradient(135deg, #3B82F6, #8B5CF6);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--slate-900);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

/* ===== NAVIGATION ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: all var(--transition);
}

.nav-scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--slate-200);
    box-shadow: var(--shadow-sm);
}

.nav-scrolled .nav-brand .brand-text,
.nav-scrolled .nav-links a {
    color: var(--slate-900);
}

.nav-scrolled .nav-btn-ghost {
    color: var(--slate-700) !important;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.brand-mark {
    width: 36px;
    height: 36px;
    background: var(--gradient-accent);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: white;
}

.brand-text {
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: 0.12em;
    color: var(--white);
    transition: color var(--transition);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 0.875rem;
    border-radius: 8px;
    transition: all var(--transition);
}

.nav-links a:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}

.nav-scrolled .nav-links a:hover {
    color: var(--blue-600);
    background: var(--slate-100);
}

.nav-btn-ghost {
    color: rgba(255, 255, 255, 0.9) !important;
}

.nav-btn-primary {
    background: var(--blue-500) !important;
    color: var(--white) !important;
    padding: 0.5rem 1.25rem !important;
    border-radius: 8px !important;
    font-weight: 600 !important;
    margin-left: 0.5rem;
    transition: background var(--transition) !important;
}

.nav-btn-primary:hover {
    background: var(--blue-600) !important;
}

.nav-mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    cursor: pointer;
    padding: 0.5rem;
}

.nav-scrolled .nav-mobile-toggle {
    color: var(--slate-900);
}

@media (max-width: 900px) {
    .nav-mobile-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem 2rem 2rem;
        border-bottom: 1px solid var(--slate-200);
        box-shadow: var(--shadow-lg);
        gap: 0.5rem;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        color: var(--slate-700) !important;
        padding: 0.75rem 1rem;
    }

    .nav-btn-primary {
        width: 100%;
        text-align: center;
        margin: 0;
    }
}


/* ===== HERO ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 500px;
    background: radial-gradient(ellipse, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    filter: blur(80px);
}

.hero-container {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 820px;
    padding: 8rem 2rem 6rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(59, 130, 246, 0.12);
    border: 1px solid rgba(59, 130, 246, 0.25);
    color: var(--blue-400);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.4rem 1rem;
    border-radius: 999px;
    margin-bottom: 2rem;
    letter-spacing: 0.02em;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--blue-400);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

.hero-title {
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--white);
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero-gradient {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.7;
    color: var(--slate-400);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: var(--blue-500);
    color: var(--white);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
}

.btn-hero-primary:hover {
    background: var(--blue-600);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45);
}

.btn-hero-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: transparent;
    color: var(--slate-300);
    border: 1px solid var(--slate-700);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
}

.btn-hero-secondary:hover {
    border-color: var(--slate-500);
    color: var(--white);
    background: rgba(255, 255, 255, 0.05);
}

.hero-metrics {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
}

.hero-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.metric-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    letter-spacing: -0.02em;
}

.metric-label {
    font-size: 0.8rem;
    color: var(--slate-500);
    font-weight: 500;
    margin-top: 0.25rem;
}

.metric-divider {
    width: 1px;
    height: 40px;
    background: var(--slate-700);
}

@media (max-width: 600px) {
    .hero-metrics {
        gap: 1.5rem;
    }

    .metric-num {
        font-size: 1.75rem;
    }

    .hero-container {
        padding: 7rem 1.5rem 4rem;
    }
}


/* ===== SECTION SHARED ===== */
.section-eyebrow {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--blue-500);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    text-align: center;
}

.section-heading {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 800;
    color: var(--slate-900);
    text-align: center;
    letter-spacing: -0.025em;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.section-subheading {
    font-size: 1.125rem;
    color: var(--slate-500);
    text-align: center;
    max-width: 550px;
    margin: 0 auto 3rem;
}


/* ===== HOW IT WORKS ===== */
.how-it-works {
    padding: 7rem 0;
    background: var(--white);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.step-card {
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    position: relative;
    transition: all var(--transition);
    text-align: center;
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--blue-500);
}

.step-number {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--blue-500);
    letter-spacing: 0.1em;
    margin-bottom: 1.25rem;
}

.step-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue-500);
    margin: 0 auto 1.25rem;
}

.step-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--slate-900);
}

.step-card p {
    color: var(--slate-500);
    font-size: 0.95rem;
    line-height: 1.65;
}

@media (max-width: 768px) {
    .steps-grid {
        grid-template-columns: 1fr;
    }
}


/* ===== FEATURES ===== */
.features {
    padding: 7rem 0;
    background: var(--slate-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius);
    padding: 2rem 1.75rem;
    transition: all var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--blue-500);
}

.feature-highlight {
    grid-column: span 3;
    background: var(--slate-900);
    border-color: var(--slate-700);
    position: relative;
    overflow: hidden;
}

.feature-highlight::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.feature-highlight h3 {
    color: var(--white);
}

.feature-highlight p {
    color: var(--slate-400);
}

.feature-tag {
    display: inline-block;
    background: var(--gradient-accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
    color: var(--slate-900);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--slate-500);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-highlight {
        grid-column: span 2;
    }
}

@media (max-width: 600px) {
    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature-highlight {
        grid-column: span 1;
    }
}

.feature-tag {
    text-align: center;
}


/* ===== INTEGRATIONS MARQUEE ===== */
.integrations {
    padding: 7rem 0;
    background: var(--white);
    overflow: hidden;
}

.integrations-marquee {
    margin: 3rem -2rem 2rem;
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: 2.5rem;
    animation: marquee 40s linear infinite;
    width: max-content;
}

@keyframes marquee {
    to {
        transform: translateX(-50%);
    }
}

.int-logo {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    filter: grayscale(100%);
    opacity: 0.5;
    transition: all var(--transition);
}

.int-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.15);
}

.int-logo img {
    max-width: 40px;
    max-height: 40px;
    object-fit: contain;
}

.integrations-link {
    text-align: center;
    font-size: 0.95rem;
}

.integrations-link a {
    color: var(--blue-500);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition);
}

.integrations-link a:hover {
    color: var(--blue-700);
}


/* ===== USE CASES ===== */
.use-cases {
    padding: 7rem 0;
    background: var(--slate-50);
}

.usecases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.usecase-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all var(--transition);
    text-align: center;
}

.usecase-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--blue-500);
}

.usecase-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.usecase-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--slate-900);
}

.usecase-card p {
    font-size: 0.9rem;
    color: var(--slate-500);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .usecases-grid {
        grid-template-columns: 1fr;
    }
}


/* ===== PRICING ===== */
.pricing {
    padding: 7rem 0;
    background: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
    align-items: start;
}

.pricing-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    position: relative;
    transition: all var(--transition);
    text-align: center;
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
}

.pricing-featured {
    border: 2px solid var(--blue-500);
    transform: scale(1.03);
    box-shadow: var(--shadow-lg);
}

.pricing-featured:hover {
    box-shadow: var(--shadow-xl);
}

.pricing-popular {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.35rem 1.25rem;
    border-radius: 999px;
    letter-spacing: 0.02em;
}

.pricing-tier {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 1rem;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.125rem;
    margin-bottom: 0.5rem;
}

.price-currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--slate-500);
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--slate-900);
    letter-spacing: -0.03em;
    line-height: 1;
}

.price-period {
    font-size: 1rem;
    color: var(--slate-500);
    font-weight: 500;
}

.pricing-tagline {
    font-size: 0.875rem;
    color: var(--slate-500);
    margin-bottom: 1.5rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
    display: inline-flex;
    flex-direction: column;
    gap: 0.75rem;
    text-align: left;
}

.pricing-features li {
    font-size: 0.9rem;
    color: var(--slate-600);
    padding-left: 1.5rem;
    position: relative;
}

.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--blue-500);
    font-weight: 700;
}

.btn-pricing {
    display: block;
    text-align: center;
    padding: 0.875rem;
    border: 1px solid var(--slate-300);
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--slate-700);
    text-decoration: none;
    transition: all var(--transition);
}

.btn-pricing:hover {
    border-color: var(--blue-500);
    color: var(--blue-600);
    background: var(--slate-50);
}

.btn-pricing-primary {
    background: var(--blue-500);
    border-color: var(--blue-500);
    color: var(--white);
}

.btn-pricing-primary:hover {
    background: var(--blue-600);
    border-color: var(--blue-600);
    color: var(--white);
}

@media (max-width: 900px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 440px;
        margin-left: auto;
        margin-right: auto;
    }

    .pricing-featured {
        transform: none;
    }
}


/* ===== INFRASTRUCTURE ===== */
.infrastructure {
    padding: 7rem 0;
    background: var(--slate-900);
}

.infrastructure .section-eyebrow {
    color: var(--blue-400);
    text-align: center;
}

.infrastructure .section-heading {
    color: var(--white);
    text-align: center;
}

.infra-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 3rem;
}

.infra-text {
    max-width: 700px;
}

.infra-description {
    font-size: 1.05rem;
    color: var(--slate-400);
    line-height: 1.75;
    margin-bottom: 1.25rem;
    text-align: center;
}

.infra-description strong {
    color: var(--white);
}

.infra-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
    justify-content: center;
}

.infra-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--slate-700);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--slate-300);
}

.infra-badge svg {
    color: var(--blue-400);
    flex-shrink: 0;
}

.infra-logos {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 2rem;
}

.infra-logo {
    height: 36px;
    width: auto;
    color: var(--slate-300);
}

.infra-logo-divider {
    width: 1px;
    height: 40px;
    background: var(--slate-700);
}

.gfs-text-logo {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--slate-300);
    white-space: nowrap;
}

.gfs-text-logo .gfs-google {
    font-weight: 700;
    color: var(--white);
}

@media (max-width: 600px) {
    .infra-logos {
        flex-direction: column;
        gap: 1.5rem;
    }

    .infra-logo-divider {
        width: 60px;
        height: 1px;
    }
}


/* ===== FINAL CTA ===== */
.final-cta {
    padding: 7rem 0;
    background: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-700) 100%);
    text-align: center;
}

.final-cta h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    color: var(--white);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.final-cta p {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2.5rem;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.final-cta .btn-hero-primary {
    background: var(--white);
    color: var(--blue-700);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.final-cta .btn-hero-primary:hover {
    background: var(--slate-50);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.final-cta .btn-hero-secondary {
    border-color: rgba(255, 255, 255, 0.4);
    color: var(--white);
}

.final-cta .btn-hero-secondary:hover {
    border-color: var(--white);
    background: rgba(255, 255, 255, 0.1);
}


/* ===== FOOTER ===== */
.footer {
    background: var(--slate-950);
    padding-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
}

.footer-brand .brand-text {
    font-size: 1rem;
    letter-spacing: 0.12em;
    font-weight: 800;
    display: block;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-brand p {
    color: var(--slate-500);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--slate-400);
    margin-bottom: 1.25rem;
}

.footer-col a {
    display: block;
    color: var(--slate-500);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.35rem 0;
    transition: color var(--transition);
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 3rem;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--slate-600);
    text-align: center;
}

@media (max-width: 768px) {
    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

@media (max-width: 480px) {
    .footer-columns {
        grid-template-columns: 1fr;
    }
}