/* Black & White Architectural Framework */
:root {
    --bg-less-white: #F9F9F9;   /* Glare-reducing off-white background */
    --surface-pure: #FFFFFF;    /* Clean contrast surface panels */
    --text-primary: #000000;    /* Crisp absolute black typography */
    --text-muted: #555555;      /* Slate gray secondary tracking text */
    --border-subtle: #EBEBEB;   /* Smooth layout splitting lines */
    --font-main: 'Poppins', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-less-white);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.mini-container {
    max-width: 750px;
    text-align: center;
}

/* Minimalist Nav Bar */
.navbar {
    height: 72px;
    display: flex;
    align-items: center;
    background: rgba(249, 249, 249, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-badge {
    background: var(--text-primary);
    color: var(--surface-pure);
    font-weight: 700;
    font-size: 16px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.brand-name {
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    gap: 28px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* Structural System Buttons */
.btn {
    font-family: var(--font-main);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    padding: 12px 28px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-black {
    background: var(--text-primary);
    color: var(--surface-pure);
    border: 1px solid var(--text-primary);
}

.btn-black:hover {
    background: #222222;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid #D5D5D5;
}

.btn-outline:hover {
    background: #EEEEEE;
    border-color: var(--text-primary);
}

/* 1. Hero Section */
.hero {
    padding: 90px 0 70px 0;
    text-align: center;
}

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 800px;
}

.hero h1 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 640px;
}

.hero-cta-group {
    display: flex;
    gap: 12px;
}

/* Global Section Header Title Formatting */
.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* 2. What is Moni Cal? */
.about-section {
    padding: 70px 0;
    background: var(--surface-pure);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: center;
}

.section-badge {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 12px;
}

.about-section h2 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.about-text {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* 3. Features Cards */
.features-section {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--surface-pure);
    border: 1px solid var(--border-subtle);
    padding: 28px;
    border-radius: 8px;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.5;
}

/* 4. How It Works Steps */
.steps-section {
    padding: 80px 0;
    background: var(--surface-pure);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.step-card {
    padding: 24px 12px;
}

.step-number {
    font-size: 28px;
    font-weight: 700;
    border-bottom: 2px solid var(--text-primary);
    display: inline-block;
    margin-bottom: 14px;
    padding-right: 8px;
}

.step-card h3 {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

/* 5. Who It's For Chips */
.sectors-section {
    padding: 80px 0;
}

.chips-matrix {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    max-width: 800px;
    margin: 0 auto;
}

.tag-chip {
    background: var(--surface-pure);
    border: 1px solid var(--border-subtle);
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
}

/* 6. Why Choose Moni Cal */
.why-section {
    padding: 80px 0;
    background: var(--surface-pure);
    border-top: 1px solid var(--border-subtle);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.why-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.why-card p {
    font-size: 13px;
    color: var(--text-muted);
}

/* 7. Call To Action Framework */
.cta-section {
    padding: 90px 0;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: center;
    background: var(--bg-less-white);
}

.cta-section h2 {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.cta-section p {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* 8. Balanced Responsive Footer Grid */
.footer {
    background: var(--text-primary);
    color: var(--surface-pure);
    padding: 60px 0 30px 0;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    font-size: 13px;
    opacity: 0.6;
    margin-top: 6px;
    max-width: 280px;
}

.footer-links-group {
    display: flex;
    gap: 60px;
}

.footer-col h4 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    opacity: 0.4;
}

.footer-col a {
    display: block;
    color: var(--surface-pure);
    text-decoration: none;
    font-size: 13px;
    margin-bottom: 8px;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.footer-col a:hover {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid #222222;
    padding-top: 20px;
    text-align: center;
    font-size: 12px;
    opacity: 0.4;
}

/* Media Breakpoint Architecture rules */
@media (max-width: 900px) {
    .features-grid, .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 32px;
    }
    .features-grid, .why-grid, .steps-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        flex-direction: column;
        gap: 32px;
    }
    .footer-links-group {
        gap: 40px;
    }
}