/* =============================================
   有限会社高橋企画 - Professional Interpretation Services
   カラースキーム: 白と青を基調としたフォーマルデザイン
   ============================================= */

/* =============================================
   1. Reset & Base Styles
   ============================================= */

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

:root {
    /* Primary Colors - Blue Theme */
    --primary-blue: #0047AB;
    --primary-blue-dark: #003380;
    --primary-blue-light: #4A90E2;
    --secondary-blue: #E8F4FD;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --off-white: #F8F9FA;
    --light-gray: #E9ECEF;
    --medium-gray: #6C757D;
    --dark-gray: #343A40;
    --black: #000000;
    
    /* Accent Colors */
    --gold: #D4AF37;
    --success-green: #28A745;
    --warning-orange: #FFA500;
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Noto Serif JP', serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
}

html {
    scroll-behavior: smooth;
}

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

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

/* =============================================
   2. Header & Navigation
   ============================================= */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 0.25rem;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--medium-gray);
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    text-decoration: none;
    color: var(--dark-gray);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: var(--transition-fast);
}

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

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

.language-switcher {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-blue);
    background: transparent;
    color: var(--primary-blue);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border-radius: 4px;
    transition: var(--transition-fast);
}

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

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
}

/* =============================================
   3. Hero Section
   ============================================= */

.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    background-image: 
        linear-gradient(135deg, rgba(0, 71, 171, 0.95) 0%, rgba(0, 51, 128, 0.95) 100%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><rect fill="%230047AB" width="1200" height="600"/><g fill-opacity="0.1"><circle fill="%23fff" cx="100" cy="100" r="80"/><circle fill="%23fff" cx="1100" cy="500" r="100"/><circle fill="%23fff" cx="600" cy="300" r="120"/></g></svg>');
    background-size: cover;
    background-position: center;
    color: var(--white);
    text-align: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
}

.hero-content {
    position: relative;
    z-index: 10;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-family: var(--font-secondary);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

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

/* =============================================
   4. Buttons
   ============================================= */

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

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

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

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

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

.btn-block {
    width: 100%;
    text-align: center;
}

/* =============================================
   5. Sections
   ============================================= */

.section {
    padding: var(--spacing-xl) 0;
}

.bg-light {
    background-color: var(--off-white);
}

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

.section-title {
    font-family: var(--font-secondary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--medium-gray);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 400;
}

/* =============================================
   6. About Section
   ============================================= */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.company-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.detail-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.detail-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

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

.detail-item h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--medium-gray);
    margin-bottom: 0.25rem;
}

.detail-item p {
    font-size: 1rem;
    color: var(--dark-gray);
}

.about-story {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.about-story h3 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.about-story p {
    margin-bottom: var(--spacing-sm);
    text-align: justify;
}

.photo-placeholder {
    margin-top: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--secondary-blue);
    border: 2px dashed var(--primary-blue-light);
    border-radius: 8px;
    text-align: center;
    color: var(--primary-blue);
}

.photo-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

/* =============================================
   7. Services Section
   ============================================= */

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

.service-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-normal);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-blue);
    border-radius: 50%;
    color: var(--primary-blue);
    font-size: 2rem;
}

.service-card h3 {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--medium-gray);
    font-size: 0.95rem;
}

.specialization {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.specialization h3 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.specialization > p {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--medium-gray);
}

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

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--secondary-blue);
    color: var(--primary-blue);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid var(--primary-blue-light);
}

.industry-note {
    text-align: center;
    font-size: 0.9rem;
    color: var(--medium-gray);
    font-style: italic;
}

.case-types {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.case-types h3 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.case-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.case-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--off-white);
    border-radius: 8px;
}

.case-list i {
    color: var(--success-green);
    font-size: 1.2rem;
}

/* =============================================
   8. Strengths Section
   ============================================= */

.strengths-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.strength-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--light-gray);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.strength-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
    border-color: var(--primary-blue-light);
}

.strength-card.highlight {
    border-color: var(--gold);
    background: linear-gradient(135deg, #FFF9E5 0%, var(--white) 100%);
}

.strength-number {
    position: absolute;
    top: -10px;
    right: -10px;
    width: 60px;
    height: 60px;
    background: var(--primary-blue);
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    opacity: 0.15;
    font-family: var(--font-secondary);
}

.strength-card h3 {
    font-size: 1.25rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.strength-card p {
    color: var(--medium-gray);
    font-size: 0.95rem;
}

.cta-box {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%);
    color: var(--white);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.cta-box h3 {
    font-family: var(--font-secondary);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
}

.cta-box p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

/* =============================================
   9. Pricing Section
   ============================================= */

.pricing-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    color: var(--medium-gray);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.pricing-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--light-gray);
    transition: var(--transition-normal);
    position: relative;
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
    border-color: var(--primary-blue-light);
}

.pricing-card.featured {
    border-color: var(--gold);
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--gold);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.85rem;
    box-shadow: var(--shadow-md);
}

.pricing-card h3 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.price-tag {
    margin-bottom: var(--spacing-sm);
}

.price-label {
    font-size: 0.9rem;
    color: var(--medium-gray);
    margin-bottom: 0.25rem;
}

.price-amount {
    font-family: var(--font-secondary);
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.price-amount span {
    font-size: 1.2rem;
    font-weight: 400;
}

.price-features {
    list-style: none;
    margin-top: var(--spacing-md);
}

.price-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    color: var(--medium-gray);
    font-size: 0.95rem;
}

.price-features i {
    color: var(--success-green);
    font-size: 1rem;
}

.pricing-notes {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.pricing-notes h4 {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.notes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.note-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--off-white);
    border-radius: 8px;
}

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

.note-item h5 {
    font-size: 1rem;
    color: var(--dark-gray);
    margin-bottom: 0.25rem;
}

.note-item p {
    font-size: 0.9rem;
    color: var(--medium-gray);
}

.note-footer {
    text-align: center;
    font-size: 0.9rem;
    color: var(--medium-gray);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--light-gray);
}

/* =============================================
   10. Testimonials Section
   ============================================= */

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.testimonial-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition-normal);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.quote-icon {
    color: var(--primary-blue-light);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.3;
}

.testimonial-text {
    font-size: 1rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.author-info h4 {
    font-size: 1rem;
    color: var(--primary-blue);
    margin-bottom: 0.25rem;
}

.author-info p {
    font-size: 0.9rem;
    color: var(--medium-gray);
}

/* =============================================
   11. FAQ Section
   ============================================= */

.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    margin-bottom: var(--spacing-sm);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question:hover {
    background: var(--secondary-blue);
}

.faq-question h4 {
    font-size: 1.1rem;
    color: var(--dark-gray);
    font-weight: 600;
}

.faq-question i {
    color: var(--primary-blue);
    transition: var(--transition-fast);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 var(--spacing-md);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--spacing-md) var(--spacing-md);
}

.faq-answer p {
    color: var(--medium-gray);
    line-height: 1.8;
}

/* =============================================
   12. Calendar Section
   ============================================= */

.calendar-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--light-gray);
}

.calendar-header h3 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    color: var(--primary-blue);
}

.calendar-nav {
    background: var(--secondary-blue);
    border: none;
    color: var(--primary-blue);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
}

.calendar-nav:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.calendar-day.header {
    font-weight: 700;
    color: var(--primary-blue);
    cursor: default;
}

.calendar-day.available {
    background: var(--success-green);
    color: var(--white);
}

.calendar-day.limited {
    background: var(--warning-orange);
    color: var(--white);
}

.calendar-day.booked {
    background: var(--medium-gray);
    color: var(--white);
    cursor: not-allowed;
}

.calendar-day.past {
    background: var(--light-gray);
    color: var(--medium-gray);
    cursor: not-allowed;
}

.calendar-day:not(.header):not(.past):not(.booked):hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.calendar-legend {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
}

.legend-color.available {
    background: var(--success-green);
}

.legend-color.limited {
    background: var(--warning-orange);
}

.legend-color.booked {
    background: var(--medium-gray);
}

.calendar-note {
    text-align: center;
    font-size: 0.9rem;
    color: var(--medium-gray);
    font-style: italic;
}

/* =============================================
   13. Contact Section
   ============================================= */

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
}

.contact-info h3 {
    font-family: var(--font-secondary);
    font-size: 1.8rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-sm);
}

.contact-info > p {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
}

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

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

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

.contact-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--medium-gray);
    margin-bottom: 0.25rem;
}

.contact-item p {
    font-size: 1rem;
    color: var(--dark-gray);
}

.phone-placeholder {
    color: var(--medium-gray);
    font-style: italic;
}

.contact-form-container {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

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

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

.form-group label {
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.required {
    color: #DC3545;
    margin-left: 0.25rem;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 71, 171, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-message {
    padding: var(--spacing-sm);
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    display: none;
    margin-top: var(--spacing-sm);
}

.form-message.success {
    background: #D4EDDA;
    color: #155724;
    display: block;
}

.form-message.error {
    background: #F8D7DA;
    color: #721C24;
    display: block;
}

/* =============================================
   14. Footer
   ============================================= */

.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-blue-light);
}

.footer-section p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.9;
}

.footer-description {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.9;
    transition: var(--transition-fast);
}

.footer-section a:hover {
    opacity: 1;
    color: var(--primary-blue-light);
}

.footer-section i {
    margin-right: 0.5rem;
    color: var(--primary-blue-light);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-bottom p {
    opacity: 0.8;
    font-size: 0.9rem;
}

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

.footer-links a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-blue-light);
}

/* =============================================
   15. Back to Top Button
   ============================================= */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    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 {
    background: var(--primary-blue-dark);
    transform: translateY(-3px);
}

/* =============================================
   16. Animations
   ============================================= */

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

/* =============================================
   17. Responsive Design
   ============================================= */

@media (max-width: 1024px) {
    .services-grid,
    .strengths-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-lg);
        transition: var(--transition-normal);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .services-grid,
    .strengths-grid,
    .pricing-grid,
    .testimonials-grid,
    .case-list,
    .notes-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .language-switcher {
        position: fixed;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        background: var(--white);
        padding: 0.5rem;
        border-radius: 50px;
        box-shadow: var(--shadow-lg);
        z-index: 1000;
    }
}