/* Design Fly - Modern Stylesheet */

/* CSS Variables */
:root {
    /* Colors */
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-surface-alt: #f5f5f5;
    --color-text: #1a1a1a;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-accent: #2563eb;
    --color-accent-dark: #1d4ed8;
    --color-accent-light: #dbeafe;
    --color-border: #e5e5e5;
    --color-success: #16a34a;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-size-6xl: 4.5rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --spacing-5xl: 8rem;
    
    /* Layout */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    
    /* Effects */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

@media (max-width: 768px) {
    h1 { font-size: var(--font-size-4xl); }
    h2 { font-size: var(--font-size-2xl); }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-text);
    background: var(--color-surface);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-text);
}

.btn-outline:hover {
    background: var(--color-text);
    color: var(--color-surface);
}

/* Hero variant for video background */
.hero .btn-outline {
    color: #ffffff;
    border-color: #ffffff;
}

.hero .btn-outline:hover {
    background: #ffffff;
    color: var(--color-text);
}

.btn-large {
    padding: 1.125rem 2.25rem;
    font-size: var(--font-size-base);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--spacing-lg) 0;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: var(--color-surface);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-sm);
}

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

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-logo img {
    height: 32px;
    width: auto;
}

/* White logo on transparent nav, dark logo when scrolled */
.logo-color {
    display: none;
}

.nav.scrolled .logo-color {
    display: block;
}

.nav.scrolled .logo-white {
    display: none;
}

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

.nav-menu a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: white;
    position: relative;
    transition: color var(--transition-fast);
}

.nav.scrolled .nav-menu a {
    color: var(--color-text);
}

.nav-menu a:not(.nav-cta):hover {
    color: var(--color-accent);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
}

.nav-cta {
    padding: 0.625rem 1.25rem;
    background: var(--color-text);
    color: var(--color-surface) !important;
    border-radius: var(--radius-md);
}

.nav-cta:hover {
    background: var(--color-accent) !important;
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: white;
    transition: all var(--transition-fast);
}

.nav.scrolled .nav-toggle span {
    background: var(--color-text);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-surface);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-4xl) var(--spacing-xl);
        gap: var(--spacing-lg);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu a {
        font-size: var(--font-size-lg);
        color: var(--color-text);
    }
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--spacing-5xl) var(--container-padding) var(--spacing-3xl);
    background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-alt) 100%);
    position: relative;
    overflow: hidden;
}

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

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.7) 0%, rgba(37, 99, 235, 0.3) 100%);
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 100%;
    background: radial-gradient(circle, var(--color-accent-light) 0%, transparent 70%);
    opacity: 0.3;
    pointer-events: none;
    z-index: 2;
}

.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
    position: relative;
    z-index: 3;
}

.hero-tagline {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    color: #ffffff;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin-bottom: var(--spacing-2xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    z-index: 3;
}

.scroll-line {
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.6), transparent);
    animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Services Section */
.services {
    padding: var(--spacing-5xl) 0;
    background: var(--color-surface);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    padding: var(--spacing-2xl);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.service-card.featured {
    background: var(--color-text);
    color: var(--color-surface);
    border-color: var(--color-text);
}

.service-card.featured h3,
.service-card.featured p,
.service-card.featured .service-list li {
    color: var(--color-surface);
}

.service-card.featured .service-icon {
    color: var(--color-accent);
}

.service-icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
}

.service-card h3 {
    margin-bottom: var(--spacing-md);
}

.service-card > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.service-list li {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding-left: var(--spacing-md);
    position: relative;
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

@media (max-width: 992px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
}

/* Portfolio Section */
.portfolio-preview {
    padding: var(--spacing-5xl) 0;
    background: var(--color-bg);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 280px);
    gap: var(--spacing-lg);
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    cursor: pointer;
}

.portfolio-item.large {
    grid-row: span 2;
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-item:hover img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26, 26, 26, 0.9) 0%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--spacing-xl);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-category {
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.portfolio-overlay h3 {
    font-size: var(--font-size-lg);
    color: white;
    margin-bottom: var(--spacing-sm);
}

.portfolio-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: white;
    text-decoration: underline;
    text-underline-offset: 4px;
}

.portfolio-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

@media (max-width: 992px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }
    
    .portfolio-item.large {
        grid-row: span 1;
    }
    
    .portfolio-item {
        height: 300px;
    }
}

@media (max-width: 640px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

/* Clients Section */
.clients {
    padding: var(--spacing-4xl) 0;
    background: var(--color-surface);
}

.clients-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl) var(--spacing-3xl);
}

.client-item {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.client-item:hover {
    color: var(--color-text);
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
}

/* Support Section */
.support {
    padding: var(--spacing-5xl) 0;
    background: var(--color-bg);
}

.support-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    max-width: var(--container-max);
    margin: 0 auto;
}

.support-text h2 {
    margin-bottom: var(--spacing-lg);
}

.support-text > p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.support-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.support-features li {
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--color-text-secondary);
}

.support-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 600;
}

.support-visual {
    display: flex;
    justify-content: center;
}

.support-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    min-width: 280px;
}

.support-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.support-card-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.metric-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.metric-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.status-ok {
    color: var(--color-success);
}

@media (max-width: 768px) {
    .support-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-5xl) 0;
    background: var(--color-text);
    color: var(--color-surface);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    color: var(--color-surface);
    margin-bottom: var(--spacing-lg);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-2xl);
}

/* Footer */
.footer {
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-brand p {
    margin-top: var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.footer-logo {
    height: 28px;
    width: auto;
}

.footer-links h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-cta {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.footer-cta:hover {
    background: #0d9488;
    transform: translateY(-1px);
}

.footer-social h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-accent);
    color: white;
}

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

.footer-bottom p {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}