/* ===========================
   CSS Variables
   =========================== */
:root {
    --color-primary: #000000;
    --color-accent: #0066FF;
    --color-accent-hover: #0052CC;
    --color-background: #FFFFFF;
    --color-gray-light: #F8F9FA;
    --color-gray-border: #E0E0E0;
    --color-text: #000000;
    --color-text-secondary: #333333;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Reduced spacing values */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 0.75rem;   /* 12px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */

    --max-width: 1200px;
    --border-radius: 8px;
}

/* ===========================
   Reset & Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-family);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Typography
   =========================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

/* ===========================
   Layout Components
   =========================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-2xl) 0;
}

/* Reduced section spacing */
@media (min-width: 768px) {
    section {
        padding: var(--spacing-2xl) 0;
    }
}

/* ===========================
   Header
   =========================== */
header {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-gray-border);
    background-color: var(--color-background);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-img {
    height: 60px;
    width: auto;
    display: block;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

@media (min-width: 768px) {
    .logo-img {
        height: 72px;
    }
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    text-align: center;
    padding: var(--spacing-2xl) 0 var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--color-background) 0%, var(--color-gray-light) 100%);
}

.hero-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }
}

/* ===========================
   CTA Button
   =========================== */
.cta-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--color-primary);
    color: var(--color-background);
    font-weight: 600;
    font-size: 1.0625rem;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    border: 2px solid var(--color-primary);
}

.cta-button:hover {
    transform: translateY(-2px);
    opacity: 0.85;
}

/* ===========================
   Problem Section
   =========================== */
.problem {
    background-color: var(--color-gray-light);
    padding: var(--spacing-xl) 0;
}

.problem-text {
    font-size: 1.0625rem;
    line-height: 1.7;
    max-width: 900px;
    margin: 0 auto;
}

/* ===========================
   Offerings Section (SaaS Pricing Style)
   =========================== */
.offerings {
    padding: var(--spacing-2xl) 0;
}

.offerings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .offerings-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
        align-items: start;
    }
}

.offering-card {
    background-color: var(--color-background);
    border: 2px solid var(--color-gray-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.offering-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.offering-title {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
}

.offering-description {
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.offering-subtitle {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.offering-features {
    list-style: none;
    padding-left: 0;
}

.offering-features li {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    position: relative;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.offering-features li::before {
    content: "•";
    position: absolute;
    left: var(--spacing-sm);
    font-weight: 700;
    color: var(--color-primary);
}

/* ===========================
   Engagement Models Section
   =========================== */
.engagement {
    background-color: var(--color-gray-light);
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
}

.engagement-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .engagement-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

.engagement-card {
    background-color: var(--color-background);
    border: 2px solid var(--color-gray-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
}

.engagement-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
}

.engagement-description {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.engagement-features {
    list-style: none;
    padding-left: 0;
    margin-bottom: var(--spacing-md);
}

.engagement-features li {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    position: relative;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.engagement-features li::before {
    content: "•";
    position: absolute;
    left: var(--spacing-sm);
    font-weight: 700;
    color: var(--color-primary);
}

.engagement-timeline {
    font-weight: 600;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-border);
}

/* ===========================
   Target Audience Section
   =========================== */
.audience {
    text-align: center;
    padding: var(--spacing-2xl) 0;
}

.audience-text {
    font-size: 1.0625rem;
    line-height: 1.7;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl) auto;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background-color: var(--color-gray-light);
    padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
    border-top: 1px solid var(--color-gray-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }
}

.footer-contact h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.footer-contact p {
    margin-bottom: var(--spacing-xs);
    font-size: 0.9375rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-links a {
    font-weight: 600;
    font-size: 0.9375rem;
}

.footer-copyright {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-border);
}

.footer-copyright p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin: 0;
}

/* ===========================
   Responsive Typography
   =========================== */
@media (min-width: 1024px) {
    .hero-title {
        font-size: 3.5rem;
    }

    .section-title {
        font-size: 2.5rem;
    }
}