/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   PIXEL UI/UX Studio - Main Stylesheet
   
   Structure:
   1. CSS Variables
   2. Reset & Base
   3. Typography
   4. Navigation
   5. Hero Section
   6. Portfolio (Bento Grid)
   7. About Section
   8. Services Section
   9. Contact Section
   10. Footer
   11. Utilities
   12. Animations
   13. Responsive
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   1. CSS VARIABLES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
:root {
    /* Colors */
    --color-primary: #5B5FFF;      /* 보라 */
    --color-secondary: #FFD93D;    /* 노랑 */
    --color-accent: #00D9FF;       /* 청록 */
    --color-dark: #0A0A0A;
    --color-white: #FFFFFF;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E5E5E5;
    --color-gray-300: #D4D4D4;
    --color-gray-400: #A3A3A3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    /* Typography */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.24);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   2. RESET & BASE
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   3. TYPOGRAPHY
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xl);
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   4. NAVIGATION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-pixel {
    color: var(--color-dark);
}

.logo-dot {
    color: var(--color-primary);
    font-size: 2rem;
    line-height: 0;
}

.nav-menu {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-dark);
    transition: var(--transition-base);
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   5. HERO SECTION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 8rem 2rem 4rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
}

.hero-container {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 7rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--spacing-lg);
}

.hero-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
}

.hero-highlight {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    opacity: 0;
}

.scroll-text {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-gray-400), transparent);
    animation: scrollAnimation 2s ease-in-out infinite;
}

@keyframes scrollAnimation {
    0%, 100% { transform: translateY(0); opacity: 0; }
    50% { transform: translateY(20px); opacity: 1; }
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   6. PORTFOLIO - BENTO GRID
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.portfolio-section {
    padding: var(--spacing-3xl) 2rem;
    background: var(--color-white);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.section-header.center {
    text-align: center;
}

/* Bento Grid - 12 Column System */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-auto-rows: 200px;
    gap: 24px;
}

/* Card Base */
.bento-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    background: var(--color-gray-100);
    transition: transform var(--transition-base);
    will-change: transform;
}

.bento-card:hover {
    transform: scale(1.02);
}

/* Video Styling */
.card-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.bento-card:hover .card-video {
    transform: scale(1.05);
}

/* Card Overlay */
.card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    color: var(--color-white);
    transform: translateY(10px);
    opacity: 0;
    transition: all 0.3s ease, background 0.3s ease;
}

.bento-card:hover .card-overlay {
    transform: translateY(0);
    opacity: 1;
}

.card-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
}

.card-title {
    font-size: clamp(1.25rem, 2vw, 2rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.card-description {
    font-size: 0.95rem;
    color: var(--color-gray-300);
}

/* Bento Grid Sizes */
/* 히어로 카드: 6x4 (cols: 6, rows: 4) */
.card-hero {
    grid-column: span 6;
    grid-row: span 4;
}

/* 메인 카드: 6x3 (cols: 6, rows: 3) */
.card-main {
    grid-column: span 6;
    grid-row: span 3;
}

/* 중간 카드: 3x3 (cols: 3, rows: 3) */
.card-medium {
    grid-column: span 3;
    grid-row: span 3;
}

/* 작은 카드: 3x2 (cols: 3, rows: 2) */
.card-small {
    grid-column: span 3;
    grid-row: span 2;
}

/* 넓은 카드: 6x2 (cols: 6, rows: 2) */
.card-wide {
    grid-column: span 6;
    grid-row: span 2;
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   7. ABOUT SECTION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.about-section {
    padding: var(--spacing-3xl) 2rem;
    background: var(--color-gray-100);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

.about-stats {
    display: flex;
    gap: 3rem;
    margin-top: var(--spacing-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-gray-500);
}

/* Gradient Blobs */
.about-image {
    position: relative;
    height: 500px;
}

.image-card {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    overflow: hidden;
}

.gradient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.6;
    animation: float 20s ease-in-out infinite;
}

.blob-1 {
    width: 300px;
    height: 300px;
    background: var(--color-secondary);
    top: -50px;
    left: -50px;
    animation-delay: 0s;
}

.blob-2 {
    width: 250px;
    height: 250px;
    background: var(--color-primary);
    bottom: -50px;
    right: -50px;
    animation-delay: 3s;
}

.blob-3 {
    width: 200px;
    height: 200px;
    background: var(--color-accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 6s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(30px, -30px); }
    50% { transform: translate(-20px, 20px); }
    75% { transform: translate(20px, 30px); }
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   8. SERVICES SECTION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.services-section {
    padding: 6rem 2rem;
    background: #F8F9FA;
}

.section-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: #5B5FFF;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: 1rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #07121D;
    margin-bottom: 1rem;
}

.service-desc {
    color: #6B7280;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.service-price {
    display: inline-block;
    font-size: 1.25rem;
    font-weight: 700;
    color: #5B5FFF;
    padding: 0.5rem 1rem;
    background: rgba(91, 95, 255, 0.1);
    border-radius: 8px;
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   9. CONTACT SECTION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.contact-section {
    padding: var(--spacing-3xl) 2rem;
    background: var(--color-gray-100);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray-500);
}

.contact-link {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-dark);
}

.contact-link:hover {
    color: var(--color-primary);
}

.contact-text-small {
    font-size: 1.125rem;
    color: var(--color-gray-600);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-input {
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    background: var(--color-white);
    transition: var(--transition-base);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   10. FOOTER
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.footer {
    padding: var(--spacing-3xl) 2rem var(--spacing-xl);
    background: var(--color-dark);
    color: var(--color-white);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-text {
    color: var(--color-gray-400);
    line-height: 1.8;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links a {
    color: var(--color-gray-400);
    transition: var(--transition-base);
}

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

.social-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.social-link {
    color: var(--color-gray-400);
    transition: var(--transition-base);
}

.social-link:hover {
    color: var(--color-primary);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
    color: var(--color-gray-500);
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   11. UTILITIES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

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

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

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

.btn-secondary:hover {
    background: var(--color-dark);
    color: var(--color-white);
}

.btn-full {
    width: 100%;
}


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   12. ANIMATIONS
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

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


/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   13. RESPONSIVE
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

/* Tablet - 1024px */
@media (max-width: 1024px) {
    /* Bento Grid - 2 Column Layout */
    .bento-grid {
        grid-template-columns: repeat(6, 1fr);
        grid-auto-rows: 180px;
        gap: 20px;
    }
    
    .card-hero {
        grid-column: span 6;
        grid-row: span 3;
    }
    
    .card-main {
        grid-column: span 6;
        grid-row: span 3;
    }
    
    .card-medium {
        grid-column: span 3;
        grid-row: span 2;
    }
    
    .card-small {
        grid-column: span 3;
        grid-row: span 2;
    }
    
    .card-wide {
        grid-column: span 6;
        grid-row: span 2;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* Mobile - 768px */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-section {
        padding: 6rem 1.5rem 3rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    /* Bento Grid - Single Column */
    .bento-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: 250px;
        gap: 16px;
    }
    
    .card-hero,
    .card-main,
    .card-medium,
    .card-small,
    .card-wide {
        grid-column: span 1;
        grid-row: span 1;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .about-image {
        height: 300px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .service-card {
        padding: 2rem;
    }
    
    .contact-form-wrapper {
        padding: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

/* Small Mobile - 480px */
@media (max-width: 480px) {
    .nav-container {
        padding: 1rem 1.5rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .portfolio-section,
    .about-section,
    .services-section,
    .contact-section {
        padding: var(--spacing-2xl) 1.5rem;
    }
    
    .bento-grid {
        grid-auto-rows: 200px;
    }
    
    .card-overlay {
        padding: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
}