/**
 * Advanced Design System - Comme.fit Inspired
 * Minimal, Modern, High-end Design
 */

/* ==========================================================================
   Enhanced Variables
   ========================================================================== */
:root {
    /* Enhanced Typography Scale */
    --font-size-xs: clamp(0.75rem, 1.5vw, 0.875rem);
    --font-size-sm: clamp(0.875rem, 2vw, 1rem);
    --font-size-base: clamp(1rem, 2.5vw, 1.125rem);
    --font-size-lg: clamp(1.25rem, 3vw, 1.5rem);
    --font-size-xl: clamp(1.75rem, 4vw, 2.5rem);
    --font-size-2xl: clamp(2.5rem, 6vw, 4rem);
    --font-size-3xl: clamp(3rem, 8vw, 6rem);
    
    /* Enhanced Spacing */
    --spacing-micro: 0.25rem;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;
    --spacing-3xl: 12rem;
    
    /* Advanced Transitions */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --ease-in-out-quart: cubic-bezier(0.77, 0, 0.175, 1);
    --ease-out-back: cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* ==========================================================================
   Advanced Typography
   ========================================================================== */
body {
    font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.display-heading {
    font-size: var(--font-size-3xl);
    font-weight: 300;
    letter-spacing: -0.04em;
    line-height: 0.9;
    text-transform: uppercase;
}

.subtitle-large {
    font-size: var(--font-size-xl);
    font-weight: 300;
    letter-spacing: 0.02em;
    line-height: 1.3;
    opacity: 0.8;
}

/* ==========================================================================
   Enhanced Hero Section
   ========================================================================== */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #000;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    animation: slowZoom 20s ease-in-out infinite alternate;
}

@keyframes slowZoom {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    padding: var(--spacing-2xl);
    max-width: 1400px;
    width: 100%;
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 900;
    letter-spacing: -0.03em;
    margin: 0;
    text-transform: uppercase;
    mix-blend-mode: difference;
    animation: heroTitleReveal 1.5s var(--ease-out-expo) forwards;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 300;
    margin-top: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 1s var(--ease-out-expo) 0.5s forwards;
}

@keyframes heroTitleReveal {
    0% {
        opacity: 0;
        transform: translateY(100px);
        filter: blur(10px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: bounce 2s infinite;
}

.scroll-indicator::after {
    content: '';
    display: block;
    width: 1px;
    height: 60px;
    background: white;
    margin: 0 auto;
    animation: scrollLine 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ==========================================================================
   Advanced Card Design
   ========================================================================== */
.overview-cards {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2px;
    background: var(--color-black);
    padding: 2px;
}

.overview-card {
    background: white;
    position: relative;
    overflow: hidden;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    transition: all 0.6s var(--ease-out-expo);
}

.overview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(0,0,0,0.05) 100%);
    opacity: 0;
    transition: opacity 0.6s var(--ease-out-expo);
    z-index: 1;
}

.overview-card:hover::before {
    opacity: 1;
}

.card-image-wrapper {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
    background: var(--color-gray-lighter);
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.2s var(--ease-out-expo);
}

.overview-card:hover .card-image {
    transform: scale(1.1);
}

.card-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 2;
}

.card-number {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 4rem;
    font-weight: 900;
    color: rgba(0,0,0,0.05);
    z-index: 0;
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    position: relative;
    z-index: 1;
}

.card-excerpt {
    color: var(--color-gray);
    line-height: 1.7;
    flex: 1;
    position: relative;
    z-index: 1;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 500;
    text-transform: uppercase;
    font-size: var(--font-size-sm);
    letter-spacing: 0.05em;
    color: var(--color-black);
    position: relative;
    z-index: 1;
    overflow: hidden;
    padding: var(--spacing-xs) 0;
}

.card-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--color-black);
    transform: translateX(-100%);
    transition: transform 0.6s var(--ease-out-expo);
}

.card-link:hover::before {
    transform: translateX(0);
}

.card-link .arrow {
    display: inline-block;
    transition: transform 0.6s var(--ease-out-expo);
}

.card-link:hover .arrow {
    transform: translateX(5px);
}

/* ==========================================================================
   Advanced Features Section
   ========================================================================== */
.features-section {
    padding: var(--spacing-3xl) 0;
    background: white;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-3xl);
}

.feature-item {
    position: relative;
    padding: 0;
    opacity: 0;
    transform: translateY(50px);
    animation: featureReveal 1s var(--ease-out-expo) forwards;
}

.feature-item:nth-child(1) { animation-delay: 0.1s; }
.feature-item:nth-child(2) { animation-delay: 0.2s; }
.feature-item:nth-child(3) { animation-delay: 0.3s; }
.feature-item:nth-child(4) { animation-delay: 0.4s; }

@keyframes featureReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-md);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 1px solid var(--color-gray-light);
    border-radius: 50%;
    transition: all 0.6s var(--ease-out-expo);
}

.feature-item:hover .feature-icon::before {
    transform: scale(1.2) rotate(90deg);
    border-color: var(--color-black);
}

.feature-icon svg {
    width: 40px;
    height: 40px;
    stroke-width: 1;
}

/* ==========================================================================
   Minimal Navigation Enhancement
   ========================================================================== */
.site-header {
    background: transparent;
    backdrop-filter: none;
    transition: all 0.6s var(--ease-out-expo);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
}

.main-nav a {
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-black);
    transition: width 0.4s var(--ease-out-expo);
}

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

/* ==========================================================================
   Advanced CTA Section
   ========================================================================== */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-black);
    color: white;
    position: relative;
    overflow: hidden;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.cta-title {
    font-size: var(--font-size-2xl);
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
}

.btn {
    padding: 1.2rem 3rem;
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    border: 1px solid currentColor;
    background: transparent;
    position: relative;
    overflow: hidden;
    transition: all 0.6s var(--ease-out-expo);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    transform: translateY(100%);
    transition: transform 0.6s var(--ease-out-expo);
    z-index: -1;
}

.btn:hover::before {
    transform: translateY(0);
}

.btn-primary {
    background: white;
    color: var(--color-black);
    border-color: white;
}

.btn-primary::before {
    background: var(--color-black);
}

.btn-primary:hover {
    color: white;
}

.btn-outline {
    color: white;
    border-color: white;
}

.btn-outline:hover {
    color: var(--color-black);
}

/* ==========================================================================
   Parallax Effects
   ========================================================================== */
.parallax-wrapper {
    position: relative;
    overflow: hidden;
}

.parallax-element {
    will-change: transform;
    transition: transform 0.5s var(--ease-out-expo);
}

/* ==========================================================================
   Loading States
   ========================================================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeOut 0.6s ease-out 2s forwards;
    pointer-events: none;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

.loading-text {
    font-size: var(--font-size-sm);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* ==========================================================================
   Mobile Refinements
   ========================================================================== */
@media (max-width: 768px) {
    .display-heading {
        font-size: var(--font-size-2xl);
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
}