/* ========================================
   MTA - Mine Trade Alliance
   Professional Mining Website Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #1a4d7a;
    --secondary-color: #2d5f8d;
    --accent-color: #d4a022;
    --dark-color: #0f2940;
    --light-color: #f8f9fa;
    --text-color: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

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

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

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

body.loaded {
    opacity: 1;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
}

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

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

/* Image loading optimization */
img[src] {
    background: var(--light-color);
}

img:not([src]) {
    visibility: hidden;
}

/* Section Styles */
section {
    padding: 80px 0;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

section.section-revealed {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    border-radius: 2px;
}

/* ========================================
   Navigation Bar
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 41, 64, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
    background: rgba(15, 41, 64, 0.98);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
}

.nav-brand .logo i {
    color: var(--accent-color);
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--white);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

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

.language-selector {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.lang-btn {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
    padding: 0.4rem 0.8rem;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.lang-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--white);
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--dark-color) 0%, var(--primary-color) 100%);
    background-image: 
        linear-gradient(135deg, rgba(15, 41, 64, 0.9) 0%, rgba(26, 77, 122, 0.9) 100%),
        url('https://www.mining-technology.com/wp-content/uploads/sites/19/2014/06/Featured-Image-Chuquicamata-Copper-Mine-.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 41, 64, 0.85) 0%, rgba(26, 77, 122, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: 2rem;
    margin-top: 60px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    font-weight: 300;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.partners-logos {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin: 3rem 0;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.partner-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.partner-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.partner-item i {
    font-size: 2rem;
    color: var(--accent-color);
}

.partner-item span {
    font-size: 0.9rem;
    font-weight: 600;
}

.cta-button {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    animation: fadeInUp 1s ease 0.6s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: #e5b02d;
}

.cta-button.large {
    padding: 1.2rem 3rem;
    font-size: 1.2rem;
}

/* ========================================
   Executive Summary Section
   ======================================== */
.executive-summary {
    background: var(--light-color);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.summary-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.summary-card.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.summary-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.card-icon i {
    font-size: 2rem;
    color: var(--white);
}

.summary-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.summary-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ========================================
   About MTA Section
   ======================================== */
.about-mta {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    text-align: left;
}

.about-text h2::after {
    left: 0;
    transform: none;
}

.partners-list {
    margin-top: 2rem;
}

.partner-detail {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: 10px;
    border-left: 4px solid var(--accent-color);
    transition: var(--transition);
}

.partner-detail:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.partner-detail i {
    font-size: 2rem;
    color: var(--primary-color);
    min-width: 40px;
}

.partner-detail h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.partner-detail p {
    color: var(--text-light);
    margin: 0;
}

.about-image img {
    border-radius: 15px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    height: 500px;
    object-fit: cover;
}

/* ========================================
   Solution Section
   ======================================== */
.solution-section {
    background: linear-gradient(135deg, var(--light-color) 0%, var(--white) 100%);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.solution-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    opacity: 0;
    transform: translateY(30px);
}

.solution-card.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.solution-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.solution-number {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.3rem;
    z-index: 2;
    box-shadow: var(--shadow-md);
}

.solution-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.solution-card h3 {
    padding: 1.5rem 2rem 1rem;
    color: var(--primary-color);
}

.solution-card ul {
    list-style: none;
    padding: 0 2rem 2rem;
}

.solution-card ul li {
    padding: 0.8rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-light);
    border-bottom: 1px solid var(--light-color);
}

.solution-card ul li:last-child {
    border-bottom: none;
}

.solution-card ul li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* ========================================
   Benefits Section
   ======================================== */
.benefits-section {
    background: var(--white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.benefit-card {
    background: var(--light-color);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
    opacity: 0;
    transform: scale(0.9);
}

.benefit-card.animate-in {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.benefit-card:hover {
    border-color: var(--accent-color);
    background: var(--white);
    box-shadow: var(--shadow-lg);
}

.benefit-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.benefit-icon i {
    font-size: 2.5rem;
    color: var(--white);
}

.benefit-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.benefit-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ========================================
   Structure Section - Ecosystem Diagram (HTML Dynamic)
   ======================================== */
.structure-section {
    background: linear-gradient(135deg, var(--dark-color) 0%, var(--primary-color) 100%);
    color: var(--white);
}

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

.structure-section .section-title::after {
    background: linear-gradient(90deg, var(--accent-color), var(--white));
}

.ecosystem-diagram-container {
    max-width: 1200px;
    margin: 0 auto;
}

.ecosystem-visual {
    background: var(--white);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: var(--shadow-xl);
    color: var(--text-color);
}

/* Diagram Header with Badges */
.diagram-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 3rem;
}

.badge-chile,
.badge-china {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge-chile {
    background: #1a4d7a;
    color: var(--white);
}

.badge-china {
    background: #c41e3a;
    color: var(--white);
}

/* Three Columns */
.three-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.column-box {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    border: 2px solid #dee2e6;
    transition: var(--transition);
}

.column-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.column-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.column-icon i {
    font-size: 2rem;
    color: var(--white);
}

.column-box h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.column-box p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}

/* Divider */
.diagram-divider {
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    margin: 2rem 0;
}

/* Partners Row */
.partners-row-diagram {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.partner-box {
    text-align: center;
    padding: 1.5rem;
    background: #fff3cd;
    border-radius: 10px;
    border: 2px solid var(--accent-color);
    transition: var(--transition);
}

.partner-box:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.partner-name {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}

.partner-box p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0;
    line-height: 1.5;
}

/* Flows Section */
.flows-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.flow-box {
    padding: 1.5rem;
    border-radius: 15px;
    border: 2px solid;
}

.flow-chile-china {
    background: #e3f2fd;
    border-color: #1a4d7a;
}

.flow-china-chile {
    background: #fce4ec;
    border-color: #c41e3a;
}

.flow-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.flow-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.flow-chile-china .flow-header i {
    color: #1a4d7a;
}

.flow-china-chile .flow-header i {
    color: #c41e3a;
}

.flow-header h4 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 700;
}

.flow-box ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.flow-box ul li {
    padding: 0.6rem 0 0.6rem 2rem;
    position: relative;
    font-size: 0.9rem;
    color: var(--text-color);
    line-height: 1.6;
}

.flow-box ul li::before {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.ecosystem-description {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.eco-section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 15px;
    border-left: 5px solid var(--accent-color);
    transition: var(--transition);
}

.eco-section:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(5px);
}

.eco-section h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.eco-section p {
    margin: 0;
    line-height: 1.8;
    opacity: 0.95;
}

.flow-info {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.flow-info h4 {
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.flow-info ul {
    list-style: none;
    padding: 0;
}

.flow-info ul li {
    padding: 1.5rem;
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    line-height: 1.8;
}

.flow-info ul li strong {
    color: var(--accent-color);
    display: block;
    margin-bottom: 0.5rem;
}

.partners-flow {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    border: 2px solid var(--accent-color);
}

.partners-flow h4 {
    color: var(--accent-color);
    margin-bottom: 2rem;
    font-size: 1.3rem;
    text-align: center;
}

.partners-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.partner-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.partner-badge:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
    transform: translateY(-5px);
}

.partner-badge strong {
    display: block;
    color: var(--accent-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.partner-badge p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.9;
    line-height: 1.6;
}

/* ========================================
   Equipment Gallery
   ======================================== */
.equipment-gallery {
    background: var(--light-color);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    opacity: 0;
    transform: scale(0.9);
}

.gallery-item.animate-in {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.gallery-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 2rem 1.5rem 1.5rem;
    transform: translateY(100%);
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay h4 {
    color: var(--white);
    margin: 0;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    background: linear-gradient(135deg, var(--accent-color) 0%, #e5b02d 100%);
    text-align: center;
    color: var(--white);
    padding: 100px 0;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-section .cta-button {
    background: var(--white);
    color: var(--primary-color);
}

.cta-section .cta-button:hover {
    background: var(--light-color);
}

/* ========================================
   Contact Section
   ======================================== */
.contact-section {
    background: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    padding: 2rem;
}

.contact-info h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: 10px;
    transition: var(--transition);
}

.info-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    min-width: 30px;
}

.info-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.3rem;
}

.info-item p {
    margin: 0;
    color: var(--text-light);
}

.partners-info {
    margin-top: 2rem;
    padding: 1.5rem;
    background: var(--light-color);
    border-radius: 10px;
}

.partners-info h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.partners-info ul {
    list-style: none;
}

.partners-info ul li {
    padding: 0.5rem 0;
    color: var(--text-light);
}

.partners-info ul li i {
    color: var(--accent-color);
    margin-right: 0.5rem;
}

/* Contact Form */
.contact-form {
    background: var(--light-color);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.form-group {
    position: relative;
    margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-light);
    transition: var(--transition);
    pointer-events: none;
    background: var(--white);
    padding: 0 0.5rem;
}

.form-group.focused label,
.form-group input:focus + label,
.form-group textarea:focus + label {
    top: -0.5rem;
    font-size: 0.85rem;
    color: var(--primary-color);
}

.submit-btn {
    width: 100%;
    padding: 1.2rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

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

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   Notification
   ======================================== */
.notification {
    position: fixed;
    top: 100px;
    right: -400px;
    background: var(--white);
    padding: 1.5rem 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow-xl);
    z-index: 10000;
    transition: var(--transition);
    border-left: 5px solid var(--success);
    max-width: 350px;
}

.notification.show {
    right: 20px;
}

.notification.success {
    border-left-color: var(--success);
}

.notification.error {
    border-left-color: var(--danger);
}

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

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-image img {
        height: 400px;
    }
    
    .partners-row {
        grid-template-columns: 1fr;
    }
    
    .three-columns,
    .partners-row-diagram,
    .flows-section {
        grid-template-columns: 1fr;
    }
    
    .ecosystem-visual {
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .navbar .container {
        flex-wrap: wrap;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--dark-color);
        flex-direction: column;
        padding: 2rem;
        gap: 0;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .language-selector {
        margin-left: auto;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .partners-logos {
        gap: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .summary-grid,
    .solution-grid,
    .benefits-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .eco-section,
    .flow-info,
    .partners-flow {
        padding: 1.5rem;
    }
    
    .ecosystem-visual {
        padding: 1.5rem;
    }
    
    .diagram-header {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
    
    .column-box,
    .partner-box,
    .flow-box {
        padding: 1.2rem;
    }
    
    .column-box h3 {
        font-size: 1.1rem;
    }
    
    .column-box p,
    .partner-box p,
    .flow-box ul li {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .partner-item {
        font-size: 0.85rem;
    }
    
    .cta-button {
        padding: 0.9rem 2rem;
        font-size: 1rem;
    }
    
    .summary-card,
    .benefit-card {
        padding: 1.5rem;
    }
}