/* KMC JAPAN Portfolio Website - Professional Styles */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* Root Variables - KMC JAPAN Professional Branding */
:root {
    /* Primary Colors */
    --primary-color: #1e3a8a;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --primary-gradient: linear-gradient(135deg, #1e3a8a 0%, #3730a3 50%, #1e40af 100%);
    
    /* Secondary Colors */
    --secondary-color: #64748b;
    --accent-color: #0ea5e9;
    --success-color: #059669;
    --warning-color: #d97706;
    --danger-color: #dc2626;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-bg: #f8fafc;
    --light-gray: #f1f5f9;
    --medium-gray: #e2e8f0;
    --dark-gray: #475569;
    --dark-text: #1e293b;
    --muted-text: #64748b;
    --dark-bg: #0f172a;
    
    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Spacing */
    --section-padding: 5rem 0;
    --container-padding: 1.5rem;
    --border-radius: 0.75rem;
    --border-radius-lg: 1rem;
    --border-radius-xl: 1.5rem;
    
    /* 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Transitions */
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--dark-text);
    background-color: var(--white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--dark-text);
}

.display-2 {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    line-height: 1.1;
}

.display-4 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
}

.section-title {
    color: var(--dark-text);
    position: relative;
    margin-bottom: 1rem;
}

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

/* Navigation Styles */
.navbar {
    background: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-base);
    padding: 1rem 0;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.98) !important;
    box-shadow: var(--shadow-lg);
}

.navbar-brand {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--white) !important;
    text-decoration: none;
    transition: var(--transition-base);
}

.navbar-brand:hover {
    color: var(--primary-light) !important;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    margin: 0 0.25rem;
    border-radius: var(--border-radius);
    transition: var(--transition-base);
    position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--white) !important;
    background: rgba(59, 130, 246, 0.1);
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-light);
    transition: var(--transition-base);
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 80%;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    background: var(--primary-gradient);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="hero-grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23hero-grid)"/></svg>');
    animation: heroPattern 20s linear infinite;
}

@keyframes heroPattern {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-10px, -10px); }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    color: var(--white);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-lg);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-buttons .btn {
    font-weight: 600;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius-lg);
    transition: var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: var(--font-size-sm);
}

.btn-primary {
    background: var(--primary-light);
    border: 2px solid var(--primary-light);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: var(--white);
    background: transparent;
}

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

/* Scroll Down Arrow */
.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.scroll-arrow {
    display: inline-block;
    color: rgba(255, 255, 255, 0.8);
    font-size: 2rem;
    animation: bounce 2s infinite;
    text-decoration: none;
    transition: var(--transition-base);
}

.scroll-arrow:hover {
    color: var(--white);
    transform: scale(1.1);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

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

.bg-light {
    background-color: var(--light-bg) !important;
}

/* About Section */
.about-content {
    padding: 2rem 0;
}

.stat-item {
    text-align: center;
    padding: 1rem;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--muted-text);
    font-weight: 500;
    margin: 0;
}

.about-image {
    position: relative;
}

.image-placeholder {
    background: var(--light-gray);
    border-radius: var(--border-radius-xl);
    padding: 4rem 2rem;
    text-align: center;
    border: 2px dashed var(--medium-gray);
    transition: var(--transition-base);
}

.image-placeholder:hover {
    border-color: var(--primary-color);
    background: var(--light-bg);
}

/* Service Cards */
.service-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 1px solid var(--medium-gray);
    height: 100%;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--primary-light);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--white);
    font-size: 2rem;
    transition: var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--dark-text);
    margin-bottom: 1rem;
}

.service-description {
    color: var(--muted-text);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--dark-gray);
    position: relative;
    padding-left: 1.5rem;
}

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

/* Portfolio Section */
.portfolio-filter {
    margin-bottom: 3rem;
}

.filter-btn {
    background: transparent;
    border: 2px solid var(--medium-gray);
    color: var(--dark-gray);
    padding: 0.75rem 1.5rem;
    margin: 0.25rem;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    transition: var(--transition-base);
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.portfolio-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    height: 100%;
}

.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.portfolio-image .image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--light-gray);
    margin: 0;
    border-radius: 0;
    border: none;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(30, 58, 138, 0.9);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-base);
}

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

.portfolio-overlay-content {
    text-align: center;
    padding: 2rem;
}

.portfolio-overlay-content h5 {
    color: var(--white);
    margin-bottom: 1rem;
}

.portfolio-overlay-content p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 0.5rem;
}

.portfolio-category {
    font-size: var(--font-size-sm);
    color: var(--muted-text);
    margin: 0;
}

/* Testimonial Cards */
.testimonial-card {
    background: var(--white);
    border-radius: var(--border-radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    height: 100%;
    border: 1px solid var(--medium-gray);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.testimonial-content {
    margin-bottom: 2rem;
}

.testimonial-text {
    font-style: italic;
    color: var(--dark-gray);
    line-height: 1.7;
    margin: 0;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-avatar {
    margin-right: 1rem;
}

.author-name {
    font-weight: 600;
    color: var(--dark-text);
    margin-bottom: 0.25rem;
}

.author-title {
    font-size: var(--font-size-sm);
    color: var(--muted-text);
    margin: 0;
}

/* Contact Section */
#contact {
    background: var(--dark-bg) !important;
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius-xl);
    padding: 3rem;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-label {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-control,
.form-select {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--white);
    border-radius: var(--border-radius);
    padding: 0.875rem 1rem;
    transition: var(--transition-base);
}

.form-control:focus,
.form-select:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-light);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.25);
    color: var(--white);
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.contact-info-item {
    text-align: center;
    padding: 2rem 1rem;
}

.contact-icon {
    margin-bottom: 1rem;
}

.contact-info-item h5 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.contact-info-item p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

/* Footer */
footer {
    background: var(--dark-bg) !important;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h5 {
    color: var(--white);
    font-weight: 700;
}

.social-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.25rem;
    transition: var(--transition-base);
    text-decoration: none;
}

.social-links a:hover {
    color: var(--primary-light);
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --section-padding: 3rem 0;
    }
    
    .display-2 {
        font-size: var(--font-size-4xl);
    }
    
    .display-4 {
        font-size: var(--font-size-3xl);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .service-card,
    .testimonial-card {
        padding: 1.5rem;
    }
    
    .contact-form {
        padding: 2rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.75rem 1rem !important;
    }
}

@media (max-width: 576px) {
    .hero-buttons .btn {
        display: block;
        width: 100%;
        margin-bottom: 1rem;
    }
    
    .portfolio-filter .filter-btn {
        display: block;
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .service-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

/* Focus Styles */
.btn:focus,
.form-control:focus,
.form-select:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .navbar,
    .hero-section,
    .scroll-down,
    footer {
        display: none !important;
    }
    
    body {
        background: var(--white) !important;
        color: var(--dark-text) !important;
    }
    
    .service-card,
    .portfolio-card,
    .testimonial-card {
        box-shadow: none !important;
        border: 1px solid var(--medium-gray) !important;
    }
}