/* ===========================
   RESET & BASE STYLES
   =========================== */

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

:root {
    /* Colors */
    --color-navy: #1a2332;
    --color-navy-light: #2a3748;
    --color-navy-dark: #0f1621;
    --color-gray: #64748b;
    --color-gray-light: #94a3b8;
    --color-gray-lighter: #cbd5e1;
    --color-gray-bg: #f8fafc;
    --color-white: #ffffff;
    --color-accent: #7c3b3b;
    --color-accent-hover: #5c2b2b;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Container */
    --container-width: 1200px;
    --container-padding: 2rem;
    
    /* Transitions */
    --transition-base: 0.3s ease;
    --transition-slow: 0.6s ease;
}

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--color-navy);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ===========================
   NAVIGATION
   =========================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(203, 213, 225, 0.5);
    transition: all var(--transition-base);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-navy);
}

.logo-system {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-gray);
}

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

.nav-link {
    text-decoration: none;
    color: var(--color-navy);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-base);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-navy);
    transition: width var(--transition-base);
}

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

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

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

.nav-link-cta::after {
    background-color: var(--color-accent);
}

/* ===========================
   HERO SECTION
   =========================== */

.hero {
    position: relative;
    padding: 10rem 0 var(--spacing-xxl);
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.4;
}

.hero-grid {
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--color-gray-lighter) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-gray-lighter) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
    animation: gridMove 60s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(40px, 40px);
    }
}

.hero-content {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-text {
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

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

.hero-title {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-md);
}

.hero-title-main {
    font-size: 3.5rem;
    font-weight: 300;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--color-navy);
}

.hero-title-sub {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--color-navy);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-gray);
    margin-bottom: var(--spacing-md);
    max-width: 540px;
}

.hero-visual {
    opacity: 0;
    animation: fadeInUp 1s ease 0.2s forwards;
}

.hero-image-placeholder {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, var(--color-navy-light) 0%, var(--color-navy) 100%);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.placeholder-text {
    color: var(--color-gray-lighter);
    font-size: 1rem;
    font-weight: 500;
}

/* ===========================
   BUTTONS
   =========================== */

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    border-radius: 2px;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--color-navy-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(26, 35, 50, 0.2);
}

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

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

/* ===========================
   SECTIONS
   =========================== */

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

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
}

/* ===========================
   SERVICES SECTION
   =========================== */

.services {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-lighter);
    border-radius: 2px;
    transition: all var(--transition-base);
    opacity: 0;
    transform: translateY(20px);
}

.service-card.visible {
    animation: fadeInUp 0.6s ease forwards;
}

.service-card:hover {
    border-color: var(--color-navy);
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(26, 35, 50, 0.08);
}

.service-icon {
    width: 40px;
    height: 40px;
    color: var(--color-navy);
    margin-bottom: var(--spacing-md);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.service-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-gray);
}

/* ===========================
   PROCESS SECTION
   =========================== */

.process {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-gray-bg);
}

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

.process-visual {
    order: 2;
}

.process-image-placeholder {
    width: 100%;
    height: 600px;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.process-image-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite 1s;
}

.process-steps {
    order: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.process-step {
    opacity: 0;
    transform: translateX(-20px);
}

.process-step.visible {
    animation: fadeInLeft 0.6s ease forwards;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.step-number {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.step-description {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-gray);
}

/* ===========================
   FOR WHOM SECTION
   =========================== */

.for-whom {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-white);
}

.for-whom-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.for-whom-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.for-whom-text p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-gray);
}

/* ===========================
   CONTACT SECTION
   =========================== */

.contact {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--color-navy-dark) 0%, var(--color-navy) 100%);
    color: var(--color-white);
}

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

.contact-title {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.contact-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-gray-lighter);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.contact-email {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-white);
    text-decoration: none;
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 0.25rem;
    transition: all var(--transition-base);
}

.contact-email:hover {
    border-bottom-color: var(--color-white);
}

/* ===========================
   FOOTER
   =========================== */

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

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

.footer-logo .logo-text {
    color: var(--color-white);
}

.footer-logo .logo-system {
    color: var(--color-gray-light);
}

.footer-info p {
    font-size: 0.875rem;
    color: var(--color-gray-light);
}

/* ===========================
   RESPONSIVE
   =========================== */

@media (max-width: 1024px) {
    :root {
        --container-padding: 1.5rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 5rem;
    }
    
    .hero-title-main,
    .hero-title-sub {
        font-size: 2.75rem;
    }
    
    .hero-content,
    .process-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .hero-visual {
        order: 2;
    }
    
    .process-visual {
        order: 1;
    }
    
    .process-steps {
        order: 2;
    }
    
    .hero-image-placeholder,
    .process-image-placeholder {
        height: 400px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }
    
    .nav-content {
        padding: 1rem 0;
    }
    
    .nav-links {
        gap: 1.5rem;
    }
    
    .nav-link {
        font-size: 0.875rem;
    }
    
    .hero {
        padding: 8rem 0 var(--spacing-lg);
    }
    
    .hero-title-main,
    .hero-title-sub {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-title {
        font-size: 2rem;
    }
    
    .contact-email {
        font-size: 1.25rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 1.25rem;
    }
    
    .logo-system {
        font-size: 0.875rem;
    }
    
    .hero-title-main,
    .hero-title-sub {
        font-size: 1.75rem;
    }
    
    .btn {
        padding: 0.875rem 1.5rem;
        font-size: 0.875rem;
    }
}