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

:root {
    --color-primary: #000000;
    --color-secondary: #666666;
    --color-accent: #0066FF;
    --color-bg: #FFFFFF;
    --color-bg-dark: #0A0A0A;
    --color-bg-light: #F5F5F5;
    --color-text: #1A1A1A;
    --color-text-light: #666666;
    --color-border: #E5E5E5;
    --color-success: #00C853;
    --color-error: #FF3D00;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --container-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

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

a:hover {
    color: var(--color-accent);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--color-accent);
    color: var(--color-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary);
    color: var(--color-bg);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* ============================================
   Header
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    min-height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

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

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

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

.hero {
    padding: calc(70px + var(--spacing-xl)) 0 var(--spacing-xl);
    background: linear-gradient(180deg, #FFFFFF 0%, #F5F5F5 100%);
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.hero-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
}

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

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

.section-header {
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
}

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

.section-title {
    margin-bottom: 0;
}

/* ============================================
   About Section
   ============================================ */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.8;
}

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

.feature-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.feature-text {
    color: var(--color-text-light);
    margin: 0;
}

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

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

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

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

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

.service-text {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.service-link {
    color: var(--color-accent);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.service-link:hover {
    gap: var(--spacing-sm);
}

/* ============================================
   Stages Section
   ============================================ */

.stages-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.stage-item {
    position: relative;
    padding-left: var(--spacing-lg);
}

.stage-number {
    position: absolute;
    left: 0;
    top: 0;
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-bg-light);
    line-height: 1;
    -webkit-text-stroke: 2px var(--color-border);
    -webkit-text-fill-color: transparent;
}

.stage-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.stage-text {
    line-height: 1.7;
    margin: 0;
}

/* ============================================
   Cases Section
   ============================================ */

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

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

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

.case-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.case-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-bg-light);
    -webkit-text-stroke: 2px var(--color-border);
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-sm);
}

.case-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.case-result {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-accent);
    margin: 0;
}

/* ============================================
   CTA Section
   ============================================ */

.cta {
    background-color: var(--color-bg-dark);
    color: var(--color-bg);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    color: var(--color-bg);
    margin-bottom: var(--spacing-md);
}

.cta-text {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
}

.cta .btn-primary {
    background-color: var(--color-bg);
    color: var(--color-bg-dark);
}

.cta .btn-primary:hover {
    background-color: var(--color-accent);
    color: var(--color-bg);
}

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

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

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

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

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

.contact-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-content h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.contact-content a {
    color: var(--color-accent);
    font-weight: 500;
}

.contact-content span {
    color: var(--color-text-light);
}

/* ============================================
   Form
   ============================================ */

.contact-form-wrapper {
    background-color: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

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

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

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
}

.form-input {
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: var(--font-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background-color: var(--color-bg);
    color: var(--color-text);
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.contact-method-select {
    display: flex;
    gap: var(--spacing-sm);
}

.contact-method-option {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    background-color: var(--color-bg);
}

.contact-method-option:hover {
    border-color: var(--color-primary);
}

.contact-method-option input[type="radio"] {
    display: none;
}

.contact-method-option input[type="radio"]:checked + .method-icon,
.contact-method-option:has(input[type="radio"]:checked) {
    border-color: var(--color-primary);
    background-color: var(--color-bg-light);
}

.method-icon {
    font-size: 2rem;
}

.method-text {
    font-size: 0.875rem;
    font-weight: 500;
}

.error-message {
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
    display: none;
}

.error-message.show {
    display: block;
}

.form-message {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background-color: rgba(0, 200, 83, 0.1);
    color: var(--color-success);
}

.form-message.error {
    display: block;
    background-color: rgba(255, 61, 0, 0.1);
    color: var(--color-error);
}

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

.footer {
    background-color: var(--color-bg-dark);
    color: var(--color-bg);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-bg);
    margin-bottom: var(--spacing-md);
}

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

.footer-list li {
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
}

.footer-list a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-list a:hover {
    color: var(--color-bg);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

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

@media (max-width: 992px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .menu-toggle {
        display: flex;
    }

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

    .hero-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero {
        padding: calc(70px + var(--spacing-lg)) 0 var(--spacing-lg);
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .stages-list {
        grid-template-columns: 1fr;
    }

    .contact-method-select {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

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