/* ===================================
   Variables & Reset
   =================================== */

:root {
    /* Colors - Light Mode */
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --color-border: #d2d2d7;
    --color-card-bg: #ffffff;
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --spacing-3xl: 96px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #000000;
        --color-bg-secondary: #1d1d1f;
        --color-text: #f5f5f7;
        --color-text-secondary: #86868b;
        --color-accent: #0a84ff;
        --color-accent-hover: #409cff;
        --color-border: #424245;
        --color-card-bg: #1d1d1f;
        --color-shadow: rgba(0, 0, 0, 0.5);
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-system);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Typography
   =================================== */

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

p {
    color: var(--color-text-secondary);
}

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

/* ===================================
   Navigation
   =================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-normal);
}

@media (prefers-color-scheme: dark) {
    .nav {
        background: rgba(0, 0, 0, 0.8);
    }
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

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

.nav-links a {
    font-size: 0.9375rem;
    color: var(--color-text);
    transition: opacity var(--transition-fast);
}

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

/* ===================================
   Buttons
   =================================== */

.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius-xl);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
    text-align: center;
}

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

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

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

.btn-secondary:hover {
    border-color: var(--color-accent);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.0625rem;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-accent), #007aff, #5856d6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}


/* ===================================
   Sections
   =================================== */

.services,
.portfolio,
.contact {
    padding: var(--spacing-3xl) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
}

/* ===================================
   Services Section
   =================================== */

.services {
    background: var(--color-bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--color-shadow);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    font-size: 1rem;
    line-height: 1.6;
}

/* ===================================
   Portfolio Section
   =================================== */

.portfolio-item-single {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    max-width: 1000px;
    margin: 0 auto;
}

.portfolio-item-single:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px var(--color-shadow);
}

.portfolio-link {
    display: block;
}

.portfolio-images-row {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
}

.portfolio-image {
    flex: 1;
    aspect-ratio: 9/16;
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: var(--radius-md);
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform var(--transition-normal);
}

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

.portfolio-info {
    padding: var(--spacing-lg);
    text-align: center;
}

.portfolio-info h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.portfolio-info p {
    font-size: 1.0625rem;
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.portfolio-tags {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.tag {
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
}

.portfolio-store-badges {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    align-items: center;
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.store-badge {
    display: block;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.store-badge:hover {
    transform: translateY(-2px);
    opacity: 0.8;
}

.store-badge img {
    height: 50px;
    width: auto;
}

/* ===================================
   Contact Section
   =================================== */

.contact {
    background: var(--color-bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    align-items: start;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: transform var(--transition-fast);
}

.contact-method:hover {
    transform: translateX(4px);
}

.method-icon {
    font-size: 1.5rem;
}

.method-text {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
}

.contact-form {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-system);
    font-size: 1rem;
    color: var(--color-text);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) var(--spacing-md) var(--spacing-md);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-brand p {
    margin-top: var(--spacing-xs);
    color: var(--color-text-secondary);
}

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

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-sm);
    }

    .nav-links a {
        font-size: 0.875rem;
    }

    .hero {
        padding: var(--spacing-2xl) var(--spacing-md);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-images-row {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .portfolio-image {
        aspect-ratio: 9/16;
    }

    .store-badge img {
        height: 40px;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        align-items: center;
    }
}

/* ===================================
   Accessibility
   =================================== */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}