/* ========================================
   RL ARTTECH - Global Styles
   Cabinet d'Architecte Premium
   ======================================== */

/* === CSS Variables === */
:root {
    /* Colors */
    --color-orange: #F5901E;
    --color-orange-dark: #E07A0A;
    --color-orange-light: #FFA640;
    --color-black: #1C1C1C;
    --color-gray-dark: #2A2A2A;
    --color-gray: #666666;
    --color-gray-light: #999999;
    --color-cream: #F8F6F3;
    --color-cream-dark: #F0EDE8;
    --color-white: #FFFFFF;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Container */
    --container-width: 1280px;
    --container-padding: 2rem;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-black);
    background-color: var(--color-white);
    overflow-x: hidden;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-black);
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-gray);
}

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

a:hover {
    color: var(--color-orange-dark);
}

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

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

/* === Section Utilities === */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-orange);
    margin-bottom: var(--spacing-sm);
}

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

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    margin-bottom: 0;
}

/* === Buttons === */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--color-orange-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-black);
    border: 2px solid var(--color-black);
}

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
}

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 0;
}

.logo {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    font-family: var(--font-display);
    font-weight: 700;
    text-decoration: none;
}

.logo-rl {
    font-size: 2rem;
    color: var(--color-black);
    letter-spacing: -2px;
}

.logo-arttech {
    font-size: 1rem;
    color: var(--color-orange);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

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

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

.nav-link:hover,
.nav-link.active {
    color: var(--color-orange);
}

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

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-md);
    padding: 1rem 0;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    list-style: none;
    margin-top: 1rem;
}

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

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--color-black);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--color-cream);
    color: var(--color-orange);
}

.btn-nav {
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-black);
    transition: all var(--transition-base);
}

/* === Footer === */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

.footer-logo {
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-logo .logo-rl {
    font-size: 2.5rem;
    color: var(--color-white);
}

.footer-logo .logo-arttech {
    font-size: 1.25rem;
    color: var(--color-orange);
}

.footer-description {
    color: var(--color-gray-light);
    margin-bottom: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-gray-dark);
    color: var(--color-white);
    border-radius: 50%;
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background-color: var(--color-orange);
    transform: translateY(-3px);
}

.footer-title {
    font-family: var(--font-primary);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.footer-links,
.footer-contact {
    list-style: none;
}

.footer-links li,
.footer-contact li {
    margin-bottom: 0.75rem;
}

.footer-links a,
.footer-contact a {
    color: var(--color-gray-light);
    transition: color var(--transition-fast);
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--color-orange);
}

.footer-contact li {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.footer-contact i {
    color: var(--color-orange);
    margin-top: 0.25rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-dark);
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

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

.footer-copyright {
    color: var(--color-gray-light);
    font-size: 0.875rem;
    margin: 0;
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 6rem;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1.5rem;
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        align-items: stretch;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all var(--transition-base);
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-link {
        padding: 0.75rem 0;
    }
    
    .nav-dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: 1rem;
        margin-top: 0.5rem;
        display: none;
    }
    
    .nav-dropdown.active .dropdown-menu {
        display: block;
    }
    
    .btn-nav {
        margin-top: 1rem;
        text-align: center;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .btn-large {
        padding: 1rem 1.75rem;
        font-size: 1rem;
    }
}

/* === Utility Classes === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }