/* === RESET & BASE === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #0f2a4a;
    --color-primary-light: #1a3d6b;
    --color-primary-dark: #091c33;
    --color-accent: #2878c8;
    --color-accent-light: #3a8ee0;
    --color-accent-dark: #1e5fa0;
    --color-white: #ffffff;
    --color-gray-50: #f8f9fa;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    --color-success: #198754;
    --color-warning: #fd7e14;
    --color-error: #dc3545;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container-max: 1200px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 96px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 600;
    color: var(--color-gray-900);
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

/* === LAYOUT === */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* === HEADER === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: background var(--transition), box-shadow var(--transition);
}

.header.scrolled {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: -0.5px;
    transition: color var(--transition);
}

.header.scrolled .logo {
    color: var(--color-primary);
}

.logo-suffix {
    font-weight: 400;
    font-size: 0.875rem;
    opacity: 0.7;
}

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

.nav-menu a {
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    transition: color var(--transition);
    position: relative;
}

.header.scrolled .nav-menu a {
    color: var(--color-gray-700);
}

.header.scrolled .nav-menu a:hover {
    color: var(--color-accent);
}

.nav-menu a:hover {
    color: var(--color-white);
}

.nav-cta {
    background: var(--color-accent);
    color: var(--color-white) !important;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: background var(--transition) !important;
}

.nav-cta:hover {
    background: var(--color-accent-light) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}

.header.scrolled .nav-toggle span {
    background: var(--color-primary);
}

/* === HERO === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.pexels.com/photos/3184465/pexels-photo-3184465.jpeg?auto=compress&cs=tinysrgb&w=1920') center/cover no-repeat;
    opacity: 0.12;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(15,42,74,0.3) 0%, rgba(15,42,74,0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: var(--spacing-4xl) 0;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
    max-width: 640px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: var(--font-family);
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--color-accent-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(40,120,200,0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 1.5px solid rgba(255,255,255,0.4);
}

.btn-secondary:hover {
    border-color: var(--color-white);
    background: rgba(255,255,255,0.08);
}

.btn-full {
    width: 100%;
}

/* === ABOUT === */
.about {
    background: var(--color-gray-50);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.about-card {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.about-icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.about-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.about-card p {
    color: var(--color-gray-600);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* === SERVICES === */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.service-card {
    padding: var(--spacing-2xl);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.service-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.service-icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-gray-600);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* === PROCESS === */
.process {
    background: var(--color-gray-50);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 36px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: var(--color-gray-300);
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.process-step h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.process-step p {
    font-size: 0.85rem;
    color: var(--color-gray-600);
    line-height: 1.5;
}

/* === WHY US === */
.why-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

.why-card {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.why-card:hover {
    background: var(--color-gray-50);
    transform: translateY(-2px);
}

.why-icon {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.why-card h3 {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.why-card p {
    font-size: 0.85rem;
    color: var(--color-gray-600);
    line-height: 1.5;
}

/* === INDUSTRIES === */
.industries {
    background: var(--color-primary);
}

.industries .section-title {
    color: var(--color-white);
}

.industries .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--spacing-lg);
}

.industry-card {
    text-align: center;
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
    color: rgba(255, 255, 255, 0.8);
}

.industry-card:hover {
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.industry-card svg {
    margin-bottom: var(--spacing-md);
}

.industry-card h3 {
    font-size: 0.95rem;
    color: var(--color-white);
}

/* === CONTACT === */
.contact {
    background: var(--color-gray-50);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

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

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

.contact-item svg {
    color: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-item h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.contact-item p {
    color: var(--color-gray-600);
    font-size: 0.9rem;
}

.contact-form {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 0.9rem;
    color: var(--color-gray-800);
    transition: border-color var(--transition);
    background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(40, 120, 200, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-notice {
    margin-top: var(--spacing-md);
    font-size: 0.85rem;
    text-align: center;
    min-height: 20px;
}

.form-notice.success {
    color: var(--color-success);
}

.form-notice.error {
    color: var(--color-error);
}

/* === FOOTER === */
.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-400);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand .logo {
    color: var(--color-white);
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 280px;
}

.footer-links h4,
.footer-contact h4 {
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-gray-400);
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-contact p {
    font-size: 0.85rem;
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding-top: var(--spacing-xl);
    text-align: center;
    font-size: 0.8rem;
}

/* === ANIMATIONS === */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-steps {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .process-steps::before {
        display: none;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .section {
        padding: var(--spacing-3xl) 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        align-items: flex-start;
        padding: 80px var(--spacing-xl) var(--spacing-xl);
        transition: right var(--transition);
        box-shadow: var(--shadow-lg);
        gap: var(--spacing-md);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu a {
        color: var(--color-gray-800) !important;
        font-size: 1rem;
    }

    .nav-menu a:hover {
        color: var(--color-accent) !important;
    }

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

    .why-grid {
        grid-template-columns: 1fr 1fr;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

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

    .why-grid {
        grid-template-columns: 1fr;
    }

    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .container {
        padding: 0 var(--spacing-md);
    }
}