/* ==========================================================================
   Emad Baqi Engineering Services & Consultations - Design System
   ========================================================================== */

:root {
    /* Color Palette */
    --color-obsidian-dark: #111111;
    --color-obsidian-card: #181818;
    --color-travertine-sand: #C5BAA8;
    --color-travertine-light: #E6DFD3;
    --color-satin-bronze: #B89F72;
    --color-satin-bronze-hover: #D4BD8F;
    --color-text-white: #FFFFFF;
    --color-text-slate: #94A3B8;
    --color-text-muted: #64748B;
    --color-border: rgba(197, 186, 168, 0.15);
    
    /* Layout & Styling Tokens */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --glass-bg: rgba(17, 17, 17, 0.4);
    --glass-blur: blur(20px);
    --border-radius-sm: 0px;
    --border-radius-md: 0px;
    --border-radius-lg: 0px;

    /* Typography defaults (Arabic-first, overridden by lang selectors) */
    --font-header: 'Cairo', sans-serif;
    --font-body: 'Tajawal', sans-serif;
}

/* ==========================================================================
   Language-Specific Typography
   ========================================================================== */

/* English layout */
html[lang="en"] {
    --font-header: 'Montserrat', 'Futura', sans-serif;
    --font-body: 'Inter', 'Helvetica Neue', 'Helvetica', sans-serif;
    font-kerning: normal;
}

/* Arabic layout */
html[lang="ar"] {
    --font-header: 'Cairo', sans-serif;
    --font-body: 'Tajawal', sans-serif;
    letter-spacing: normal;
}

/* ==========================================================================
   Bilingual Display Rules
   ========================================================================== */
html[lang="en"] .lang-ar {
    display: none !important;
}
html[lang="ar"] .lang-en {
    display: none !important;
}

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

/* Primary Headings */
h1, h2, h3, h4 {
    font-family: var(--font-header);
    font-weight: 700;
    line-height: 1.25;
}

/* English-only heading enhancements */
html[lang="en"] h1,
html[lang="en"] h2 {
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Body text */
p, li, span, label, td {
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.7;
}

/* UI Components (nav, buttons, labels) */
.nav-link,
.btn,
.filter-btn,
.lang-toggle,
.stat-num,
.stat-label,
.badge {
    font-family: var(--font-header);
    font-weight: 500;
}

/* Arabic body text slightly larger for legibility on mobile */
html[lang="ar"] p,
html[lang="ar"] li {
    font-size: 1.02em;
}

/* ==========================================================================
   Reset & Core Styling
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--color-obsidian-dark);
    font-family: var(--font-body);
    color: var(--color-text-white);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    gap: 10px;
}

.btn-primary {
    background-color: var(--color-satin-bronze);
    color: var(--color-obsidian-dark);
}

.btn-primary:hover {
    background-color: var(--color-satin-bronze-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(184, 159, 114, 0.25);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--color-text-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--color-satin-bronze);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* Section Header styling */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    color: var(--color-text-white);
}

html[lang="en"] .section-title {
    letter-spacing: 1px;
}

.section-divider {
    width: 60px;
    height: 3px;
    background-color: var(--color-satin-bronze);
    margin: 0 auto 20px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-slate);
    max-width: 700px;
    margin: 0 auto;
}

/* ==========================================================================
   Header / Navbar
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition-smooth);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    font-family: 'Cinzel', serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-text-white);
    letter-spacing: 1px;
    line-height: 1;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-slate);
    padding: 8px 0;
    position: relative;
}

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

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

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

/* Adjust animation direction for Arabic RTL */
html[lang="ar"] .nav-link::after {
    left: auto;
    right: 0;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-toggle {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text-white);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.lang-toggle:hover {
    border-color: var(--color-satin-bronze);
    background-color: rgba(184, 159, 114, 0.1);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: zoomHero 20s infinite alternate ease-in-out;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(17, 17, 17, 0.95) 30%, rgba(17, 17, 17, 0.4) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    font-weight: 900;
    margin-bottom: 24px;
    color: var(--color-text-white);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-slate);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-ctas {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

@keyframes zoomHero {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

/* ==========================================================================
   Stats Section
   ========================================================================== */
.stats-section {
    position: relative;
    z-index: 3;
    background-color: var(--color-obsidian-card);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    padding: 40px 0;
    margin-top: -50px;
    box-shadow: 0 -20px 40px rgba(0,0,0,0.5);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-card {
    padding: 10px;
}

.stat-num {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--color-satin-bronze);
    margin-bottom: 8px;
    font-family: var(--font-en);
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-slate);
    font-weight: 600;
}

/* ==========================================================================
   Overview Section (Why Us)
   ========================================================================== */
.overview-section {
    padding: 100px 0;
    background-color: var(--color-obsidian-card);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.overview-card {
    background-color: var(--color-obsidian-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition-smooth);
}

.overview-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-satin-bronze);
}

.overview-card i {
    font-size: 2.5rem;
    color: var(--color-satin-bronze);
    margin-bottom: 20px;
}

.overview-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text-white);
}

.overview-card p {
    font-size: 0.95rem;
    color: var(--color-text-slate);
    line-height: 1.6;
}

/* ==========================================================================
   Page Banner & Dynamic Sub-Pages
   ========================================================================== */
.page-banner {
    background-color: var(--color-obsidian-card);
    border-bottom: 1px solid var(--color-border);
    padding: 60px 0;
    margin-top: 80px; /* offset for fixed navbar */
}

.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-text-white);
    margin-bottom: 16px;
}

.services-detail-section {
    padding: 80px 0;
}

.services-detailed-list {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.service-detail-item {
    display: flex;
    gap: 40px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 60px;
}

.service-detail-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.detail-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--border-radius-md);
    background-color: var(--color-satin-bronze);
    color: var(--color-obsidian-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
}

.detail-text {
    flex-grow: 1;
}

.detail-text h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text-white);
}

.service-desc-paragraph {
    font-size: 1.05rem;
    color: var(--color-text-slate);
    margin-bottom: 30px;
    line-height: 1.7;
}

.sub-services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.sub-service-box {
    background-color: var(--color-obsidian-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 24px;
    transition: var(--transition-smooth);
}

.sub-service-box:hover {
    border-color: rgba(184, 159, 114, 0.4);
    background-color: rgba(255,255,255,0.01);
}

.sub-service-box h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-satin-bronze);
}

.sub-service-box p {
    font-size: 0.9rem;
    color: var(--color-text-slate);
    line-height: 1.6;
}

/* ==========================================================================
   Portfolio Section
   ========================================================================== */
.portfolio-section {
    padding: 100px 0;
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-slate);
    padding: 10px 24px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--color-satin-bronze);
    color: var(--color-obsidian-dark);
    border-color: var(--color-satin-bronze);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.portfolio-item {
    position: relative;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    aspect-ratio: 4/3;
    border: 1px solid var(--color-border);
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.portfolio-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 30px 24px;
    background: linear-gradient(to top, rgba(17, 17, 17, 0.95) 0%, rgba(17, 17, 17, 0) 100%);
    z-index: 10;
    transform: translateY(10px);
    opacity: 0;
    transition: var(--transition-smooth);
}

.portfolio-item:hover img {
    transform: scale(1.08);
}

.portfolio-item:hover .portfolio-info {
    transform: translateY(0);
    opacity: 1;
}

.portfolio-info h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--color-text-white);
}

.portfolio-info p {
    font-size: 0.85rem;
    color: var(--color-satin-bronze);
    font-weight: 600;
}

/* ==========================================================================
   Contact & Consultation Section
   ========================================================================== */
.contact-section {
    padding: 100px 0;
    background-color: var(--color-obsidian-card);
    border-top: 1px solid var(--color-border);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: start;
}

.contact-card {
    background-color: var(--color-obsidian-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text-slate);
}

.form-group input, .form-group select {
    width: 100%;
    padding: 14px 18px;
    background-color: var(--color-obsidian-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-white);
    font-family: inherit;
    font-size: 0.95rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--color-satin-bronze);
    background-color: rgba(255,255,255,0.02);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23B89F72'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
    background-size: 24px;
}

/* Select icon styling for English LTR */
html[lang="en"] .form-group select {
    background-position: left 18px center;
}

.info-card {
    background-color: var(--color-obsidian-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    height: 100%;
}

.info-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--color-text-white);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 32px;
}

.info-item i {
    font-size: 1.4rem;
    color: var(--color-satin-bronze);
    margin-top: 4px;
}

.info-item h4 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text-white);
}

.info-item p {
    font-size: 0.95rem;
    color: var(--color-text-slate);
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 40px;
}

.social-links a {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background-color: var(--color-obsidian-card);
    border: 1px solid var(--color-border);
    color: var(--color-text-slate);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition-smooth);
}

.social-links a:hover {
    background-color: var(--color-satin-bronze);
    color: var(--color-obsidian-dark);
    border-color: var(--color-satin-bronze);
    transform: translateY(-3px);
}

/* ==========================================================================
   Scroll Reveal Animations
   ========================================================================== */
.service-detail-item,
.overview-card,
.stat-card,
.portfolio-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.service-detail-item.revealed,
.overview-card.revealed,
.stat-card.revealed,
.portfolio-item.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: #000000;
    border-top: 1px solid var(--color-border);
    padding: 30px 0;
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.footer-logo {
    height: 50px;
    width: auto;
    object-fit: contain;
    opacity: 0.9;
}

.footer-brand-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

html[lang="ar"] .footer-brand-text {
    text-align: right;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    /* Navbar menu collapse */
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: #000000;
        border-top: 1px solid var(--color-border);
        flex-direction: column;
        align-items: center;
        padding-top: 60px;
        gap: 40px;
        transition: var(--transition-smooth);
        z-index: 999;
    }
    
    /* Reveal menu when open */
    .nav-menu.open {
        left: 0;
    }
    
    /* Flip slide-in direction for RTL */
    html[lang="ar"] .nav-menu {
        left: auto;
        right: -100%;
    }
    html[lang="ar"] .nav-menu.open {
        right: 0;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
    }
    
    .service-detail-item {
        flex-direction: column;
        gap: 20px;
    }
    
    .sub-services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-ctas {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-ctas .btn {
        width: 100%;
    }
    
    .logo-text {
        font-size: 0.95rem;
    }
    
    .footer-brand {
        flex-direction: column;
        gap: 12px;
    }
    
    .footer-brand-text,
    html[lang="ar"] .footer-brand-text {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .logo-text {
        font-size: 0.85rem;
    }
}