/* ===========================================
   SJMID - Main Stylesheet
   Sudanese Japanese for Mining & Integrated Development
   White Background Theme
   =========================================== */

/* --- CSS Variables --- */
:root {
    --gold-primary: #C8A951;
    --gold-light: #E8D48B;
    --gold-dark: #8B6914;
    --navy-dark: #0A1628;
    --navy: #132040;
    --navy-light: #1E3155;
    --white: #FFFFFF;
    --gray-100: #F8F9FA;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-600: #4A5568;
    --gray-800: #1A202C;
    --black: #111111;
    --font-primary: 'Inter', sans-serif;
    --font-display: 'Playfair Display', serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --shadow-gold: 0 4px 20px rgba(200, 169, 81, 0.3);
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--gray-800);
    line-height: 1.8;
    overflow-x: hidden;
    background-color: var(--white);
}

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

ul { list-style: none; }

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

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

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
    color: var(--white);
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(200, 169, 81, 0.5);
}

.btn-outline {
    border: 2px solid var(--navy-dark);
    color: var(--navy-dark);
    background: transparent;
}

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

.btn-large {
    padding: 18px 48px;
    font-size: 1.1rem;
}

/* --- Navigation --- */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0,0,0,0.08);
}

#main-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

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

.logo-img {
    height: 55px;
    width: auto;
    object-fit: contain;
}

#main-footer .logo-img {
    height: 40px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--black);
    letter-spacing: 0.1em;
}

.logo-sub {
    font-size: 0.6rem;
    color: var(--gray-600);
    letter-spacing: 0.05em;
}

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

.nav-links a {
    color: var(--gray-800);
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

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

.nav-links a:hover {
    color: var(--gold-dark);
}

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

.nav-cta {
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
    color: var(--white) !important;
    padding: 10px 24px !important;
    border-radius: 4px;
}

.nav-cta::after { display: none !important; }

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-gold);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--navy-dark);
    transition: var(--transition);
}

/* --- Hero Section --- */
#hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(200, 169, 81, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(200, 169, 81, 0.04) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.hero-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--gold-primary);
    border-radius: 50%;
    opacity: 0;
    animation: float-particle 6s infinite;
}

@keyframes float-particle {
    0% { opacity: 0; transform: translateY(100vh) scale(0); }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    100% { opacity: 0; transform: translateY(-10vh) scale(1); }
}

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

.hero-subtitle {
    font-size: 1rem;
    color: var(--gold-dark);
    letter-spacing: 0.15em;
    margin-bottom: 20px;
    font-weight: 600;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.3s;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    color: var(--black);
    line-height: 1.3;
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.5s;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--gray-600);
    line-height: 2;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.7s;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.9s;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 1.1s;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--gold-dark);
    font-family: var(--font-display);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--gray-600);
    letter-spacing: 0.1em;
    font-weight: 500;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}

.hero-scroll a {
    color: var(--gold-primary);
    font-size: 1.5rem;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

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

/* --- Section Styles --- */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--gold-dark);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--black);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--gray-600);
}

/* --- About Section --- */
#about {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-lead {
    font-size: 1.1rem;
    font-weight: 500;
    line-height: 2;
    margin-bottom: 16px;
    color: var(--black);
}

.about-content p {
    margin-bottom: 24px;
    color: var(--gray-600);
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--gray-100);
    border-radius: 8px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    border-color: var(--gold-primary);
}

.feature-item i {
    font-size: 1.5rem;
    color: var(--gold-dark);
    width: 40px;
    text-align: center;
}

.feature-item h4 {
    font-size: 0.95rem;
    color: var(--black);
    margin-bottom: 2px;
}

.feature-item p {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin-bottom: 0;
}

.info-card {
    background: var(--white);
    border-radius: 12px;
    padding: 36px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
    border-top: 4px solid var(--gold-primary);
}

.info-card h3 {
    font-size: 1.2rem;
    color: var(--black);
    margin-bottom: 24px;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table tr {
    border-bottom: 1px solid var(--gray-200);
}

.info-table tr:last-child {
    border-bottom: none;
}

.info-table th,
.info-table td {
    padding: 12px 8px;
    text-align: left;
    font-size: 0.85rem;
}

.info-table th {
    font-weight: 700;
    color: var(--black);
    white-space: nowrap;
    width: 130px;
}

.info-table td {
    color: var(--gray-600);
}

/* --- Operations Section --- */
#operations {
    background: var(--gray-100);
}

.operations-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.operation-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 32px 24px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

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

.operation-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(200, 169, 81, 0.15), rgba(200, 169, 81, 0.05));
    border-radius: 12px;
    margin-bottom: 20px;
}

.operation-icon i {
    font-size: 1.5rem;
    color: var(--gold-dark);
}

.operation-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(200, 169, 81, 0.15);
    font-family: var(--font-display);
}

.operation-card h3 {
    font-size: 1.1rem;
    color: var(--black);
    margin-bottom: 12px;
}

.operation-card > p {
    font-size: 0.85rem;
    color: var(--gray-600);
    margin-bottom: 16px;
    line-height: 1.8;
}

.operation-list {
    padding-left: 0;
}

.operation-list li {
    font-size: 0.8rem;
    color: var(--gray-600);
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}

.operation-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    background: var(--gold-primary);
    border-radius: 50%;
    transform: translateY(-50%);
}

/* --- Mining Site Section (Single Feature) --- */
#mining-sites {
    background: var(--white);
}

.site-feature {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: center;
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
}

.site-feature-image {
    height: 100%;
    min-height: 400px;
    position: relative;
    background: linear-gradient(135deg, #c2955a, #8b6914);
    background-size: cover;
    background-position: center;
}

.site-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(46, 204, 113, 0.9);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.site-feature-content {
    padding: 48px 48px 48px 0;
}

.site-feature-content h3 {
    font-size: 1.8rem;
    color: var(--black);
    margin-bottom: 8px;
}

.site-location {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-bottom: 20px;
}

.site-location i {
    color: var(--gold-dark);
    margin-right: 6px;
}

.site-description {
    font-size: 0.95rem;
    color: var(--gray-600);
    line-height: 1.9;
    margin-bottom: 32px;
}

.site-details-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.detail-card {
    background: var(--gray-100);
    padding: 16px 20px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--gray-200);
}

.detail-label {
    display: block;
    font-size: 0.75rem;
    color: var(--gray-600);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    font-size: 1.1rem;
    color: var(--black);
}

/* --- Sustainability Section --- */
#sustainability {
    background: var(--gray-100);
}

#sustainability .section-title {
    color: var(--black);
}

#sustainability .section-subtitle {
    color: var(--gray-600);
}

.sustainability-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.sustain-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

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

.sustain-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(200, 169, 81, 0.15), rgba(200, 169, 81, 0.05));
    border-radius: 50%;
}

.sustain-icon i {
    font-size: 1.5rem;
    color: var(--gold-dark);
}

.sustain-card h3 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--black);
}

.sustain-card p {
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 20px;
}

.sustain-stat {
    border-top: 1px solid var(--gray-200);
    padding-top: 16px;
}

.sustain-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--gold-dark);
    font-family: var(--font-display);
}

.sustain-label {
    font-size: 0.75rem;
    color: var(--gray-600);
}

/* --- CTA Section --- */
#cta {
    background: var(--white);
    padding: 80px 0;
    border-top: 1px solid var(--gray-200);
}

.cta-content {
    text-align: center;
    background: linear-gradient(135deg, var(--gold-primary) 0%, var(--gold-dark) 100%);
    padding: 60px 48px;
    border-radius: 16px;
}

.cta-content h2 {
    font-size: 1.8rem;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

#cta .btn-primary {
    background: var(--white);
    color: var(--gold-dark);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    font-weight: 700;
}

#cta .btn-primary:hover {
    background: var(--black);
    color: var(--white);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.3);
}

/* --- Footer --- */
#main-footer {
    background: var(--white);
    padding: 60px 0 0;
    color: var(--gray-600);
    border-top: 1px solid var(--gray-200);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid var(--gray-200);
}

.footer-brand p {
    margin-top: 16px;
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--gray-600);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 0.9rem;
    color: var(--black);
    margin-bottom: 20px;
    font-weight: 700;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.footer-links ul li a:hover {
    color: var(--gold-dark);
}

.footer-contact p {
    font-size: 0.85rem;
    margin-bottom: 10px;
    color: var(--gray-600);
}

.footer-contact i {
    color: var(--gold-dark);
    margin-right: 8px;
    width: 16px;
}

.footer-domain {
    margin-top: 8px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--gray-600);
}

/* --- Scroll Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .operations-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sustainability-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    
    .site-feature {
        grid-template-columns: 1fr;
    }
    
    .site-feature-image {
        min-height: 250px;
    }
    
    .site-feature-content {
        padding: 32px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        padding: 100px 32px 32px;
        gap: 24px;
        transition: var(--transition);
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .hero-stats {
        gap: 32px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .operations-grid {
        grid-template-columns: 1fr;
    }
    
    .sustainability-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .site-details-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description br {
        display: none;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .site-details-grid {
        grid-template-columns: 1fr;
    }
}