/* ===================================
   VARIABLES & RESET
   =================================== */

:root {
    /* Colors */
    --color-primary: #0a0a0a;
    --color-secondary: #f5f1ec;
    --color-accent: #d8d0c3;
    --color-white: #ffffff;
    --color-beige-dark: #e8e2d8;
    --color-gray-light: #e0e0e0;
    --color-gray-medium: #5a5a5a;
    --color-gray-dark: #1a1a1a;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(1, 1, 1, 0.05);
    --shadow-md: 0 4px 16px rgba(1, 1, 1, 0.08);
    --shadow-lg: 0 8px 32px rgba(1, 1, 1, 0.12);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-weight: var(--font-weight-regular);
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-secondary);
    overflow-x: hidden;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: -0.01em;
}

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

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

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

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

/* ===================================
   UTILITIES
   =================================== */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-gray-medium);
    max-width: 600px;
    margin: 0 auto;
    font-weight: var(--font-weight-regular);
}

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

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    text-align: center;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background-color: var(--color-gray-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(10, 10, 10, 0.25);
}

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

.btn-secondary:hover {
    background-color: var(--color-beige-dark);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.btn-full {
    width: 100%;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-secondary);
    z-index: 1000;
    transition: all var(--transition-medium);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
    border-bottom-color: var(--color-accent);
    background-color: rgba(245, 241, 236, 0.98);
    backdrop-filter: blur(10px);
}

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

.logo-img {
    height: 40px;
    width: auto;
    transition: var(--transition-fast);
}

.logo:hover .logo-img {
    opacity: 0.8;
}

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

.nav-link {
    font-weight: var(--font-weight-medium);
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition-fast);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--color-secondary);
    padding: var(--spacing-xl) 0;
    margin-top: 80px;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-weight: var(--font-weight-regular);
    animation: fadeInUp 1s ease;
}

.hero .btn {
    animation: fadeInUp 1.2s ease;
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-gray-dark);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    animation: fadeIn 1.5s ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 2px;
    height: 50px;
    background: linear-gradient(to bottom, var(--color-gray-dark), transparent);
    animation: scrollAnimation 2s ease-in-out infinite;
    border-radius: 2px;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes scrollAnimation {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(10px);
        opacity: 0.5;
    }
}

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

.services {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-secondary);
}

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

.service-card {
    padding: var(--spacing-lg);
    background-color: var(--color-white);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    transition: all var(--transition-medium);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

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

.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-primary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    transition: var(--transition-medium);
}

.service-card:hover .service-icon {
    background-color: var(--color-secondary);
    color: var(--color-primary);
}

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

.service-card p {
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

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

.service-features li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-gray-dark);
    font-size: 0.95rem;
    font-weight: var(--font-weight-medium);
}

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

/* ===================================
   REALISATIONS SECTION
   =================================== */

.realisations {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-secondary);
}

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

.project-card {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-medium);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--color-beige-dark);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/10;
    background-color: var(--color-gray-light);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(1, 1, 1, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-medium);
}

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

.project-status {
    color: var(--color-white);
    font-weight: var(--font-weight-medium);
    background-color: rgba(242, 238, 233, 0.2);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
}

.project-info {
    padding: var(--spacing-md);
}

.project-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.project-info h3 {
    margin-bottom: var(--spacing-sm);
}

.project-info p {
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.project-results {
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-beige-dark);
    margin-top: var(--spacing-sm);
}

.result-item {
    display: flex;
    flex-direction: column;
}

.result-label {
    font-size: 0.75rem;
    color: var(--color-gray-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.result-value {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

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

.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-secondary);
}

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

.contact-info h3 {
    margin-bottom: var(--spacing-md);
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    line-height: 1.3;
}

.contact-info p {
    color: var(--color-gray-medium);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.contact-methods {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border: 2px solid var(--color-accent);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    transition: all var(--transition-medium);
}

.contact-method:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.contact-method svg {
    flex-shrink: 0;
    margin-top: 0.25rem;
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.contact-method:hover svg {
    transform: scale(1.1);
}

.contact-method div {
    display: flex;
    flex-direction: column;
}

.method-label {
    font-size: 0.75rem;
    color: var(--color-gray-medium);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: var(--font-weight-semibold);
}

.method-value {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    font-size: 1.05rem;
}

.contact-cta {
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-gray-dark) 100%);
    color: var(--color-white);
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: 0 4px 16px rgba(10, 10, 10, 0.2);
    position: relative;
    overflow: hidden;
}

.contact-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.contact-cta:hover::before {
    left: 100%;
}

.cta-text {
    margin: 0;
    font-size: 0.95rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    position: relative;
    z-index: 1;
    letter-spacing: 0.02em;
}

/* Contact Form */
.contact-form {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-beige-dark);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-semibold);
    font-size: 0.875rem;
    color: var(--color-gray-dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    background-color: #faf8f5;
    transition: all var(--transition-medium);
    color: var(--color-primary);
    font-weight: var(--font-weight-regular);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-medium);
    opacity: 0.7;
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: var(--color-gray-dark);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 4px rgba(10, 10, 10, 0.06);
    transform: translateY(-1px);
}

.form-group:focus-within label {
    color: var(--color-primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.6;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%235a5a5a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1.25rem center;
    padding-right: 3rem;
}

.form-notice {
    font-size: 0.8rem;
    color: var(--color-gray-medium);
    text-align: center;
    margin-top: var(--spacing-md);
    line-height: 1.6;
    font-style: italic;
}

/* Form animations */
.form-group {
    animation: fadeInUp 0.5s ease backwards;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }

.btn-full {
    animation: fadeInUp 0.5s ease 0.5s backwards;
}

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

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

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-md);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo {
    height: 36px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    margin: 0;
}

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

.footer-link {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

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

.separator {
    color: rgba(255, 255, 255, 0.4);
}

.footer-copyright p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

/* ===================================
   MODAL
   =================================== */

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(1, 1, 1, 0.8);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    max-width: 700px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-gray-medium);
    transition: var(--transition-fast);
    line-height: 1;
    width: 40px;
    height: 40px;
}

.modal-close:hover {
    color: var(--color-primary);
}

.modal-content h2 {
    margin-bottom: var(--spacing-md);
    padding-right: var(--spacing-lg);
}

.modal-content h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.modal-body p {
    color: var(--color-gray-dark);
    line-height: 1.8;
}

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

@media (max-width: 1024px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--color-secondary);
        width: 100%;
        text-align: center;
        transition: left var(--transition-medium);
        box-shadow: var(--shadow-md);
        padding: var(--spacing-md) 0;
        gap: 0;
    }

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

    .nav-menu li {
        padding: var(--spacing-sm) 0;
    }

    .mobile-toggle {
        display: flex;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translateY(10px);
    }

    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-10px);
    }

    /* Hero */
    .hero {
        min-height: 80vh;
    }

    .hero-scroll {
        display: none;
    }

    /* Sections */
    .services,
    .realisations,
    .contact {
        padding: var(--spacing-lg) 0;
    }

    .section-header {
        margin-bottom: var(--spacing-md);
    }

    .services-grid,
    .projects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    /* Modal */
    .modal-content {
        width: 95%;
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

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

    .btn {
        padding: 0.875rem 1.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .service-card,
    .contact-form {
        padding: var(--spacing-md);
    }

    .project-results {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ===================================
   ACCESSIBILITY
   =================================== */

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

    html {
        scroll-behavior: auto;
    }
}

/* Focus visible for keyboard navigation */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}