/* ==========================================
   ZWASH - MINIMAL DESIGN SYSTEM
   Core Concept: "Make complexity invisible"
   ========================================== */

/* ========== CSS RESET & BASE ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-grey-light: #EAEAEA;
    --color-grey-mid: #C0C0C0;
    --color-grey-dark: #808080;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    /* Border Radius */
    --radius-sm: 2px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-medium: 300ms ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
}

a {
    color: var(--color-black);
    text-decoration: none;
    transition: all var(--transition-fast);
}

/* ========== UTILITIES ========== */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========== TOP NAVIGATION ========== */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-white);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-medium);
}

.top-nav.scrolled {
    border-bottom-color: var(--color-grey-light);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 1.25rem var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.nav-brand {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-links a {
    font-weight: 500;
    font-size: 16px;
    position: relative;
}

.nav-links a:hover {
    opacity: 0.7;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-black);
    transition: width var(--transition-fast);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-link-signin {
    margin-left: var(--spacing-sm);
}

/* ========== CTA BUTTONS ========== */
.cta-button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-primary);
    font-weight: 500;
    font-size: 16px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    border: 1px solid var(--color-black);
    cursor: pointer;
}

.cta-button.primary {
    background-color: var(--color-black);
    color: var(--color-white);
}

.cta-button.primary:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

.cta-button.secondary {
    background-color: var(--color-white);
    color: var(--color-black);
}

.cta-button.secondary:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

/* ========== HERO SECTION ========== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    max-width: 800px;
}

.hero-logo {
    margin-bottom: var(--spacing-md);
    animation: logoAppear 1s ease;
}

@keyframes logoAppear {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hero-logo svg {
    width: 160px;
    height: 160px;
}

.hero-divider {
    width: 120px;
    height: 1px;
    background-color: var(--color-black);
    margin: var(--spacing-md) auto;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -1px;
    animation: slideUp 0.8s ease 0.2s both;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 18px;
    color: var(--color-grey-dark);
    margin-bottom: var(--spacing-lg);
    animation: slideUp 0.8s ease 0.4s both;
}

.hero-cta {
    display: inline-flex;
    gap: var(--spacing-sm);
    animation: slideUp 0.8s ease 0.6s both;
}

/* ========== FEATURE SNAPSHOT ========== */
.feature-snapshot {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: var(--color-white);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-grey-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-medium);
    cursor: pointer;
}

.feature-card:hover {
    background-color: var(--color-black);
    color: var(--color-white);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.feature-description {
    font-size: 16px;
    opacity: 0.8;
}

/* ========== BUILT FOR SECTION ========== */
.built-for-section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.section-title {
    font-size: 32px;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.roles-table {
    max-width: 800px;
    margin: 0 auto;
}

.role-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.role-name {
    font-weight: 600;
    font-size: 18px;
}

.role-benefit {
    font-size: 16px;
    color: var(--color-grey-dark);
    text-align: right;
}

.role-divider {
    height: 1px;
    background: repeating-linear-gradient(
        to right,
        var(--color-grey-mid) 0px,
        var(--color-grey-mid) 4px,
        transparent 4px,
        transparent 8px
    );
}

/* ========== HOW IT WORKS TIMELINE ========== */
.how-it-works-section {
    padding: var(--spacing-xl) var(--spacing-md);
    background-color: #FAFAFA;
}

.timeline {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-black);
    animation: drawLine 1.5s ease;
}

@keyframes drawLine {
    from {
        height: 0;
    }
    to {
        height: 100%;
    }
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    animation: fadeInItem 0.6s ease forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.2s; }
.timeline-item:nth-child(2) { animation-delay: 0.4s; }
.timeline-item:nth-child(3) { animation-delay: 0.6s; }
.timeline-item:nth-child(4) { animation-delay: 0.8s; }
.timeline-item:nth-child(5) { animation-delay: 1s; }

@keyframes fadeInItem {
    to {
        opacity: 1;
    }
}

.timeline-dot {
    position: absolute;
    left: -36px;
    top: 0;
    width: 20px;
    height: 20px;
    background-color: var(--color-black);
    border-radius: 50%;
    border: 4px solid var(--color-white);
}

.timeline-content h3 {
    font-size: 20px;
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--color-grey-dark);
}

/* ========== MOCKUP SECTION ========== */
.mockup-section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.mockup-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.laptop-frame {
    border: 3px solid var(--color-black);
    border-radius: 12px;
    padding: 20px;
    background-color: var(--color-white);
}

.laptop-screen {
    aspect-ratio: 16 / 10;
    border: 2px solid var(--color-grey-light);
    border-radius: 4px;
    overflow: hidden;
    background-color: #FAFAFA;
}

.screen-content {
    padding: var(--spacing-sm);
}

.wireframe-header {
    height: 40px;
    background-color: var(--color-grey-light);
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
}

.wireframe-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.wireframe-card {
    aspect-ratio: 1;
    background-color: var(--color-grey-light);
    border-radius: 4px;
}

.mockup-text h2 {
    font-size: 36px;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.mockup-text p {
    font-size: 18px;
    color: var(--color-grey-dark);
}

/* ========== FINAL CTA ========== */
.final-cta {
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.cta-divider {
    width: 40px;
    height: 2px;
    background-color: var(--color-black);
    margin: 0 auto var(--spacing-md);
}

.cta-title {
    font-size: 32px;
    margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
    font-size: 18px;
    color: var(--color-grey-dark);
    margin-bottom: var(--spacing-md);
}

.cta-buttons {
    display: inline-flex;
    gap: var(--spacing-sm);
}

/* ========== FOOTER ========== */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-md);
}

.footer-content {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-text {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 400;
}

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

.footer-links a {
    color: var(--color-white);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.footer-links a:hover {
    opacity: 0.7;
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 1024px) {
    .mockup-layout {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-logo svg {
        width: 120px;
        height: 120px;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-cta .cta-button {
        width: 100%;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .role-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .role-benefit {
        text-align: left;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 4rem;
        --spacing-lg: 2rem;
    }
    
    .nav-container {
        padding: 1rem var(--spacing-sm);
    }
    
    .nav-brand {
        font-size: 18px;
    }
    
    .cta-button {
        font-size: 14px;
        padding: 0.625rem 1.25rem;
    }
}