/* ===================================
   XVENDER24 - TESLA MINIMAL STYLE
   Style: Strategic Infrastructure
   =================================== */

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

:root {
    /* Colors */
    --primary-bg: #0a0a0a;
    --secondary-bg: #111111;
    --accent-blue: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --cost-grey: #505050;
    
    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --weight-regular: 400;
    --weight-semibold: 600;
    --weight-bold: 700;
    --weight-extra-bold: 800;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 32px;
    --spacing-lg: 64px;
    --spacing-xl: 128px;
    
    /* Animation */
    --transition-smooth: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.3s ease;
}

/* ===== BASE STYLES ===== */
body {
    font-family: var(--font-main);
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html {
    scroll-behavior: smooth;
}

/* ===== NAVIGATION ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: var(--weight-extra-bold);
    letter-spacing: -0.5px;
    color: var(--accent-blue);
}

.logo a {
    text-decoration: none;
    color: inherit;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--accent-blue);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-top: 80px;
}

/* ===== SCREEN SECTIONS ===== */
.screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-xl) var(--spacing-md);
    overflow: hidden;
}

.screen-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    z-index: 10;
    position: relative;
}

/* ===== TYPOGRAPHY ===== */
.headline {
    font-size: clamp(48px, 8vw, 96px);
    font-weight: var(--weight-extra-bold);
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: var(--spacing-md);
    max-width: 4ch;
    margin-left: auto;
    margin-right: auto;
}

.subtitle {
    font-size: clamp(18px, 3vw, 28px);
    font-weight: var(--weight-semibold);
    color: var(--text-secondary);
    line-height: 1.4;
    letter-spacing: 0.5px;
}

.tagline {
    font-size: clamp(20px, 3.5vw, 32px);
    font-weight: var(--weight-bold);
    color: var(--accent-blue);
    margin: var(--spacing-md) 0;
}

.final-line {
    font-size: clamp(56px, 10vw, 112px);
    font-weight: var(--weight-extra-bold);
    letter-spacing: -3px;
    margin: var(--spacing-lg) 0;
}

.conclusion {
    font-size: clamp(24px, 4vw, 40px);
    font-weight: var(--weight-bold);
    margin-top: var(--spacing-lg);
    color: var(--accent-blue);
}

/* ===== ANIMATIONS ===== */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-smooth), 
                transform var(--transition-smooth);
}

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

.fade-in-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--transition-smooth), 
                transform var(--transition-smooth);
}

.fade-in-scale.visible {
    opacity: 1;
    transform: scale(1);
}

.fade-in-seq {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-smooth), 
                transform var(--transition-smooth);
}

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

.delay-1 { transition-delay: 0.8s; }
.delay-2 { transition-delay: 1.6s; }
.delay-3 { transition-delay: 2.4s; }
.delay-4 { transition-delay: 3.2s; }

/* ===== SCREEN 1: CITY CANVAS ===== */
.city-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ===== SCREEN 2: STOREFRONT & COST LAYERS ===== */
.screen-2 {
    background: linear-gradient(to bottom, var(--primary-bg), #050505);
}

.cost-layers {
    margin: var(--spacing-lg) 0;
}

.cost-item {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: var(--weight-bold);
    color: var(--cost-grey);
    margin: var(--spacing-sm) 0;
}

.storefront-silhouette {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    width: 300px;
    height: 400px;
    opacity: 0.2;
}

.cost-tag {
    position: relative;
    width: 100%;
    padding: var(--spacing-sm);
    margin: var(--spacing-xs) 0;
    background: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--accent-blue);
    font-size: 14px;
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cost-tag::before {
    content: attr(data-label);
}

/* ===== SCREEN 3: COST BAR ===== */
.cost-bar-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: var(--spacing-xl) auto;
}

.cost-bar {
    position: relative;
    width: 100%;
    height: 600px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.cost-segment {
    position: relative;
    width: 100%;
    transition: all var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-weight: var(--weight-bold);
    font-size: 18px;
}

.cost-segment::before {
    content: attr(data-label);
}

.cost-segment.delivery {
    height: 30%;
    background: linear-gradient(135deg, #ff6b6b, #ff4757);
}

.cost-segment.retail {
    height: 25%;
    background: linear-gradient(135deg, #ffa502, #ff7f00);
}

.cost-segment.labor {
    height: 45%;
    background: linear-gradient(135deg, #5f27cd, #341f97);
}

.cost-segment.dissolve {
    opacity: 0;
    transform: translateY(-100px);
}

.cost-label-start,
.cost-label-end {
    position: absolute;
    left: -60px;
    font-size: 32px;
    font-weight: var(--weight-extra-bold);
    color: var(--accent-blue);
}

.cost-label-start {
    top: 0;
}

.cost-label-end {
    bottom: 0;
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.cost-label-end.visible {
    opacity: 1;
}

/* ===== SCREEN 4: NETWORK CANVAS ===== */
.network-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ===== SCREEN 5: SPLIT EFFECT & CTA ===== */
.split-effect {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
}

.split-left,
.split-right {
    width: 50%;
    height: 100%;
}

.split-left {
    background: radial-gradient(circle at center, rgba(0, 212, 255, 0.1), transparent);
}

.split-right {
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.05), transparent);
}

/* ===== CTA BUTTONS ===== */
.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.btn {
    display: inline-block;
    padding: 18px 48px;
    font-size: 16px;
    font-weight: var(--weight-bold);
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: 4px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-blue);
    color: var(--primary-bg);
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
    background: #00b8e6;
    box-shadow: 0 0 40px var(--accent-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--accent-blue);
}

.btn-secondary:hover {
    background: var(--accent-blue);
    color: var(--primary-bg);
    transform: translateY(-2px);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--secondary-bg);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer p {
    color: var(--text-secondary);
    font-size: 14px;
    margin: var(--spacing-xs) 0;
}

.footer a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none; /* Simplified for mobile - could add hamburger menu */
    }
    
    .headline {
        font-size: 48px;
        max-width: none;
    }
    
    .subtitle {
        font-size: 20px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
    }
    
    .cost-bar {
        height: 400px;
    }
    
    .split-effect {
        flex-direction: column;
    }
    
    .split-left,
    .split-right {
        width: 100%;
        height: 50%;
    }
    
    .storefront-silhouette {
        display: none;
    }
}