/* ULTRA-MINIMALIST DESIGN SYSTEM */

:root {
    /* LIGHT MODE (DEFAULT) */
    --bg-base: #FFFFFF;
    --bg-surface: #FAFAFA;
    --bg-alt: #F4F4F5;

    --text-primary: #111111;
    --text-secondary: #666666;
    --text-tertiary: #A1A1AA;

    --border-color: #E5E5E5;

    --accent-bg: #000000;
    --accent-text: #FFFFFF;
    --accent-hover: #333333;

    --nav-bg: rgba(255, 255, 255, 0.85);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --transition-speed: 0.5s;
    --easing: cubic-bezier(0.22, 1, 0.36, 1);

    /* Gradients */
    --gradient-1: radial-gradient(circle at top right, rgba(0, 50, 255, 0.05), transparent 50%);
    --gradient-2: radial-gradient(circle at bottom left, rgba(0, 50, 255, 0.03), transparent 50%);
    --hero-gradient: linear-gradient(135deg, rgba(0, 0, 0, 0.02) 0%, rgba(0, 0, 0, 0) 100%);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-weight: 300;
    background-image: var(--gradient-1), var(--gradient-2);
    background-attachment: fixed;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-speed) var(--easing),
        color var(--transition-speed) var(--easing);
}

/* Typography */
h1,
h2,
h3,
h4 {
    font-weight: 500;
    line-height: 1.1;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

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

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

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

.section {
    padding: 8rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-speed) var(--easing);
}

.section-dark {
    background-color: var(--bg-surface);
    transition: background-color var(--transition-speed) var(--easing);
}

.mt-2 {
    margin-top: 2rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 4px;
    /* Slightly sharp corners for seriousness */
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent-bg);
    color: var(--accent-text);
}

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

.btn-secondary {
    background-color: #ffffff;
    color: #111111;
    border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
    background-color: #f8fafc;
    border-color: #cbd5e1;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    transition: background-color var(--transition-speed) var(--easing),
        border-color var(--transition-speed) var(--easing);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-size: 1.25rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: -0.02em;
}

.brand-accent {
    font-weight: 400;
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

/* Hero Section */
.hero {
    padding-top: 10rem;
    padding-bottom: 6rem;
    min-height: 90vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-speed) var(--easing);
    background-image: url('assets/insight_hero.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text p {
    font-size: 1.25rem;
    max-width: 480px;
}

.hero-visual {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Features Block */
.section-header {
    margin-bottom: 6rem;
}

.subtitle {
    font-size: 1.25rem;
    max-width: 600px;
}

/* Early Users Section */
.early-user-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 2rem;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s var(--easing), box-shadow 0.3s var(--easing);
}

.early-user-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
}

.early-user-logo {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.early-user-logo img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.early-user-content {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem 4rem;
}

.feature-block {
    position: relative;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    transition: border-color var(--transition-speed) var(--easing);
}

.feature-num {
    position: absolute;
    top: -1.75rem;
    left: 0;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-tertiary);
}

/* Solutions Split */
.layout-split {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 6rem;
}

.clean-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.clean-list li {
    font-size: 1rem;
    color: var(--text-secondary);
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.clean-list li:last-child {
    border-bottom: none;
}

.list-title {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

/* Pricing Grid */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

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

.pricing-card {
    display: flex;
    flex-direction: column;
    padding: 3rem 2rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    /* Minimalist slightly rounded edge */
    background-color: var(--bg-surface);
    transition: transform 0.3s ease, border-color var(--transition-speed) var(--easing), background-color var(--transition-speed) var(--easing);
    position: relative;
}

.pricing-card.popular {
    border-color: var(--text-primary);
}

.tier-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-primary);
    color: var(--bg-base);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tier-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.tier-price {
    font-size: 2.5rem;
    font-weight: 500;
    margin-bottom: 2rem;
    color: var(--text-primary);
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.tier-price span {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-list li {
    padding-bottom: 1rem;
    font-size: 0.875rem;
}

/* Contact Form */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-surface);
    padding: 3rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--bg-base);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    border-radius: 4px;
    transition: border-color var(--transition-speed);
}

.form-group textarea {
    resize: none;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-secondary);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400 !important;
    font-size: 0.875rem !important;
    color: var(--text-secondary) !important;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    accent-color: var(--accent-bg);
}

/* FAQ Accordion */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: color var(--transition-speed);
}

.faq-question:hover {
    color: var(--text-secondary);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-answer p {
    padding-bottom: 1.5rem;
    padding-right: 2rem;
    margin: 0;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    padding: 3rem 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.footer-brand {
    font-weight: 500;
    color: var(--text-primary);
}

/* Standardized Fade-Up Animation */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s var(--easing), transform 1s var(--easing);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 {
    transition-delay: 0.1s;
}

.delay-2 {
    transition-delay: 0.2s;
}

/* Mobile Sidebar & Navigation Core */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
}

.mobile-sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-sidebar-overlay.open {
    opacity: 1;
    visibility: visible;
}

.mobile-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-surface);
    z-index: 999;
    transform: translateX(100%);
    transition: transform 0.4s var(--easing);
    display: flex;
    flex-direction: column;
    padding: 2rem;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
}

.mobile-sidebar.open {
    transform: translateX(0);
}

.mobile-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.close-sidebar-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
}

.mobile-sidebar-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.mobile-sidebar-links a {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--text-primary);
}

.pricing-arrow {
    display: none;
}

/* Responsive */
@media (max-width: 992px) {

    .hero-container,
    .layout-split {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-text p {
        margin: 0 auto 1.5rem;
    }

    .feature-block {
        text-align: left;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.15rem;
    }

    p {
        font-size: 1rem;
    }

    .section {
        padding: 4rem 0;
    }

    .hero {
        padding-top: 7rem;
        padding-bottom: 2rem;
        min-height: auto;
    }

    .section-header {
        margin-bottom: 3rem;
    }

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    /* Horizontal scrolling for pricing on mobile */
    .pricing-grid {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        margin: 0 -2rem;
        /* Bleed to edge of screen and pad to center 80% cards */
        padding: 1rem 10vw 2rem 10vw;
        scroll-padding: 0 10vw;
        gap: 1.5rem;
    }

    /* Hide scrollbar for cleaner look */
    .pricing-grid::-webkit-scrollbar {
        display: none;
    }

    .pricing-grid {
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    .pricing-grid .pricing-card {
        flex: 0 0 80%;
        scroll-snap-align: center;
        margin: 0;
    }

    .pricing-arrow {
        display: flex;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        z-index: 10;
        background: var(--bg-surface);
        border: 1px solid var(--border-color);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        border-radius: 50%;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        color: var(--text-primary);
        cursor: pointer;
    }

    .pricing-arrow.prev-arrow {
        left: 0;
    }

    .pricing-arrow.next-arrow {
        right: 0;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
        position: relative;
        z-index: 101;
    }
}