/* ================================
   Global Styles & Reset
================================ */
:root {
    /* DMP Brand Color Palette */
    --primary-color: #003D7A;
    --primary-dark: #002B56;
    --primary-light: #0055A5;
    --secondary-color: #FF9900;
    --secondary-dark: #E68A00;
    --secondary-light: #FFB347;
    --accent-color: #FF9900;
    --success-color: #10b981;
    --danger-color: #ef4444;
    
    /* Neutral Colors - Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    
    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, #003D7A 0%, #0055A5 100%);
    --gradient-secondary: linear-gradient(135deg, #FF9900 0%, #E68A00 100%);
    --gradient-ai: linear-gradient(135deg, #003D7A 0%, #FF9900 100%);
    --gradient-tech: linear-gradient(135deg, #0055A5 0%, #003D7A 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 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, 0.15);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(0, 61, 122, 0.3);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ================================
   Header & Navigation
================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.navbar {
    padding: 1rem 0;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-ai);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.logo-image {
    height: 45px;
    width: auto;
    display: block;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-menu a:not(.btn-contact):hover {
    color: var(--primary-light);
}

.nav-menu a:not(.btn-contact)::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-ai);
    transition: var(--transition-normal);
}

.nav-menu a:not(.btn-contact):hover::after {
    width: 100%;
}

.btn-contact {
    background: var(--gradient-primary);
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: var(--shadow-glow);
    color: #ffffff !important;
}

.btn-contact:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 61, 122, 0.5);
    color: #ffffff !important;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

/* ================================
   Hero Section
================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(0, 61, 122, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 80% 30%, rgba(255, 153, 0, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 60% 80%, rgba(0, 85, 165, 0.06) 0%, transparent 50%);
}

.ai-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(0, 61, 122, 0.3), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(255, 153, 0, 0.3), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(0, 85, 165, 0.3), transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(0, 61, 122, 0.3), transparent);
    background-size: 200% 200%;
    animation: particleFloat 20s ease-in-out infinite;
}

@keyframes particleFloat {
    0%, 100% { background-position: 0% 0%; }
    50% { background-position: 100% 100%; }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 61, 122, 0.08);
    border: 1px solid rgba(0, 61, 122, 0.3);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-family: var(--font-secondary);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #003D7A 0%, #0055A5 50%, #FF9900 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    font-family: var(--font-primary);
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-secondary {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(0, 0, 0, 0.15);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 0, 0, 0.2);
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-ai);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Neural Network Canvas */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    height: 450px;
}

#neuralNetwork {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--text-muted);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    width: 4px;
    height: 10px;
    background: var(--primary-light);
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: mouseScroll 2s infinite;
}

@keyframes mouseScroll {
    0% { top: 10px; opacity: 1; }
    100% { top: 30px; opacity: 0; }
}

/* ================================
   Section Styles
================================ */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    background: rgba(0, 61, 122, 0.08);
    border: 1px solid rgba(0, 61, 122, 0.3);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-family: var(--font-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ================================
   Services Section
================================ */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition-normal);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 61, 122, 0.3);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    background: #ffffff;
}

.service-card.featured {
    border: 2px solid rgba(0, 61, 122, 0.5);
    background: rgba(0, 61, 122, 0.02);
}

.featured-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    margin-bottom: 1.5rem;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.service-features i {
    color: var(--success-color);
    font-size: 0.875rem;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

.service-link:hover {
    gap: 1rem;
}

/* ================================
   Technology Section
================================ */
.technology {
    background: #ffffff;
}

.tech-categories {
    display: grid;
    gap: 2rem;
}

.tech-category {
    background: var(--bg-secondary);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-card);
}

.tech-category:hover {
    border-color: rgba(0, 61, 122, 0.3);
    background: #ffffff;
    box-shadow: var(--shadow-md);
}

.tech-category h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.tech-category i {
    color: var(--primary-light);
    font-size: 1.5rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tech-tag {
    background: rgba(255, 153, 0, 0.08);
    border: 1px solid rgba(255, 153, 0, 0.3);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    cursor: default;
}

.tech-tag:hover {
    background: rgba(255, 153, 0, 0.15);
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
}

/* ================================
   Projects Section
================================ */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-card);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 61, 122, 0.3);
    box-shadow: var(--shadow-xl);
}

.project-image {
    height: 200px;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    opacity: 0.8;
}

.project-content {
    padding: 2rem;
}

.project-category {
    display: inline-block;
    background: rgba(0, 61, 122, 0.08);
    border: 1px solid rgba(0, 61, 122, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.project-content h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    background: rgba(255, 153, 0, 0.08);
    border: 1px solid rgba(255, 153, 0, 0.3);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--secondary-color);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--primary-dark);
    gap: 0.75rem;
}

.project-link i {
    font-size: 0.875rem;
}

.project-card.featured-project {
    border: 2px solid var(--primary-color);
    background: linear-gradient(135deg, rgba(0, 61, 122, 0.02) 0%, rgba(255, 153, 0, 0.02) 100%);
    position: relative;
}

.project-card.featured-project::before {
    content: '運営中';
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 1;
}

/* ================================
   Process Section
================================ */
.process {
    background: #ffffff;
}

.process-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.process-step {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
}

.process-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 50px;
    top: 100px;
    width: 2px;
    height: calc(100% - 50px);
    background: linear-gradient(180deg, rgba(0, 61, 122, 0.5) 0%, transparent 100%);
}

.step-number {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    color: white;
    box-shadow: var(--shadow-glow);
}

.step-content {
    background: var(--bg-secondary);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-card);
}

.step-content:hover {
    border-color: rgba(0, 61, 122, 0.3);
    background: #ffffff;
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.step-content h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-content i {
    color: var(--primary-light);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ================================
   About Section
================================ */
.about {
    background: var(--bg-secondary);
}

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

.about-text h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.about-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.company-info {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-light);
    margin-top: 0.25rem;
}

.info-item strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.info-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.about-visual {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stats-card {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-card);
}

.stat-item-large {
    text-align: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.stat-item-large:last-child {
    border-bottom: none;
}

.stat-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-number-large {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-ai);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label-large {
    font-size: 1rem;
    color: var(--text-muted);
}

.values-card {
    background: rgba(0, 61, 122, 0.02);
    border: 1px solid rgba(0, 61, 122, 0.2);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-card);
}

.values-card h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.values-card i {
    color: var(--accent-color);
}

.values-card ul {
    list-style: none;
}

.values-card li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.values-card li i {
    color: var(--success-color);
}

/* ================================
   Contact Section
================================ */
.contact {
    background: #ffffff;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
}

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

.info-card {
    background: var(--bg-secondary);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-card);
}

.info-card:hover {
    border-color: rgba(0, 61, 122, 0.3);
    background: #ffffff;
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.info-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.info-card h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.contact-link {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-fast);
}

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

.contact-form-wrapper {
    background: var(--bg-secondary);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-card);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.required {
    color: var(--danger-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-sm);
    padding: 0.875rem;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(0, 61, 122, 0.1);
}

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

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* ================================
   Footer
================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo h3 {
    font-size: 1.5rem;
    background: var(--gradient-ai);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.footer-logo-image {
    height: 50px;
    width: auto;
    display: block;
    margin-bottom: 1rem;
}

.footer-logo p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: #ffffff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    box-shadow: var(--shadow-card);
}

.social-links a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    transform: translateY(-3px);
}

.footer-column h4 {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

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

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 0.5rem;
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.footer-contact i {
    color: var(--primary-light);
    margin-top: 0.25rem;
}

.footer-bottom {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding-top: 2rem;
    text-align: center;
}

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

/* ================================
   Back to Top Button
================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* ================================
   Responsive Design
================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-visual {
        order: -1;
        height: 300px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 840px) {
    html {
        font-size: 14px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: 2rem;
        gap: 1rem;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: var(--transition-normal);
        border-bottom: 1px solid rgba(0, 0, 0, 0.08);
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-visual {
        height: 250px;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .services-grid,
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-step {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .process-step::after {
        display: none;
    }
    
    .step-number {
        width: 70px;
        height: 70px;
        font-size: 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }

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

/* ================================
   Utility Classes
================================ */
.text-center {
    text-align: center;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

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

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

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

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

.slide-in-left {
    animation: slideInLeft 0.8s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.8s ease-out;
}