/* CSS Variables */
:root {
    --color-main: #0D0D0D;
    --color-secondary: #FFFFFF;
    --color-gray-1: #F2F2F2;
    --color-gray-2: #BFBFBF;
    --color-gray-3: #737373;
    --color-gray-4: #404040;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* Reset & Base */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: var(--font-body);
    color: var(--color-main);
    background-color: var(--color-secondary);
    line-height: 1.6;
}
h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; line-height: 1.2; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
section { padding: 80px 0; }

/* Header */

header {
    background: var(--color-main);
    color: var(--color-secondary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

/* Logo */

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;

    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-decoration: none;

    min-width: 0;
}

.logo-img {
    height: 90px;
    width: auto;
    display: block;
    flex-shrink: 0;
}

.logo span {
    color: var(--color-gray-2);
    line-height: 1;
    white-space: nowrap;
}

/* Navigation */

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--color-gray-2);
}

/* Header actions */

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.lang-switch {
    background: transparent;
    border: 1px solid var(--color-gray-2);
    color: var(--color-secondary);
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s;
}

.lang-switch:hover,
.lang-switch.active {
    background: var(--color-secondary);
    color: var(--color-main);
}

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

/* =========================
Mobile phones
========================= */

@media (max-width: 480px) {

    .header-container {
        padding: 8px 12px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 0.85rem;
        flex-shrink: 1;
        min-width: 0;
    }

    .logo-img {
        height: 60px;
        width: auto;
        flex-shrink: 0;
    }

    .logo span {
        display: block !important;
        font-size: 0.85rem;
        white-space: nowrap;
        overflow: visible;
    }

    .header-actions {
        gap: 4px;
        flex-shrink: 0;
    }

    .lang-switch {
        padding: 3px 6px;
        font-size: 0.7rem;
    }
}

/* Hero */
.hero {
    background: linear-gradient(135deg, rgba(13,13,13,0.85) 0%, rgba(64,64,64,0.75) 100%), url('https://pub-7148852a60a64bfebb9f6111603fdfba.r2.dev/db_consortium/CONSORTIUMX_BLUE.svg') no-repeat center center/cover;
    color: var(--color-secondary);
    padding: 120px 0;
    text-align: center;
}
.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}
.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 40px;
    color: var(--color-gray-1);
}
.btn-primary {
    background: var(--color-secondary);
    color: var(--color-main);
    padding: 15px 40px;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.3s;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    background: var(--color-gray-1);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255,255,255,0.2);
}
.btn-dark {
    background: var(--color-main);
    color: var(--color-secondary);
    padding: 15px 40px;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.3s;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    width: 100%;
}
.btn-dark:hover {
    background: var(--color-gray-4);
    transform: translateY(-2px);
}

/* Section Titles */
.section-title {
    text-align: center;
    margin-bottom: 60px;
}
.section-title h2 {
    font-size: 2.5rem;
    color: var(--color-main);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}
.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--color-main);
}
.section-title p {
    color: var(--color-gray-3);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 20px auto 0;
}

/* About / Problem / Solution */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}
.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--color-gray-4);
}
.about-text p {
    color: var(--color-gray-3);
    margin-bottom: 20px;
    font-size: 1.05rem;
}
.about-img img {
    border-radius: 8px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

/* Services */
.services { background: var(--color-gray-1); }
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.service-card {
    background: var(--color-secondary);
    padding: 40px 30px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--color-gray-2);
}
.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.05);
}
.service-card i {
    font-size: 3rem;
    color: var(--color-main);
    margin-bottom: 20px;
}
.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}
.service-card p {
    color: var(--color-gray-3);
}

/* Benefits & Why Us */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 80px;
}
.benefit-card {
    text-align: center;
    padding: 30px;
}
.benefit-card i {
    font-size: 2.5rem;
    color: var(--color-main);
    margin-bottom: 15px;
}
.benefit-card h4 {
    font-size: 1.2rem;
    color: var(--color-gray-4);
}
.why-us-list {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.why-us-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--color-gray-1);
    padding: 20px;
    border-radius: 8px;
}
.why-us-item i {
    color: var(--color-main);
    font-size: 1.5rem;
}
.why-us-item p {
    font-weight: 500;
    color: var(--color-gray-4);
}

/* Audience */
.audience { background: var(--color-main); color: var(--color-secondary); }
.audience .section-title h2 { color: var(--color-secondary); }
.audience .section-title h2::after { background: var(--color-secondary); }
.audience .section-title p { color: var(--color-gray-2); }
.audience-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.2rem;
    color: var(--color-gray-1);
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}
.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}
.contact-item i {
    font-size: 1.5rem;
    color: var(--color-main);
    background: var(--color-gray-1);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}
.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}
.contact-item p, .contact-item a {
    color: var(--color-gray-3);
    font-size: 1rem;
}
.contact-form {
    background: var(--color-gray-1);
    padding: 40px;
    border-radius: 8px;
    width: 100%;
    max-width: 800px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--color-gray-4);
}
.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--color-gray-2);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color 0.3s;
    background: var(--color-secondary);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-main);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* Footer */
footer {
    background: var(--color-main);
    color: var(--color-gray-2);
    padding: 60px 0 30px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 40px;
}
.footer-col h4 {
    color: var(--color-secondary);
    margin-bottom: 20px;
    font-size: 1.2rem;
}
.footer-col p, .footer-col a {
    color: var(--color-gray-2);
    margin-bottom: 10px;
    display: block;
    transition: color 0.3s;
}
.footer-col a:hover { color: var(--color-secondary); }
.social-links { display: flex; gap: 15px; margin-top: 20px; }
.social-links a {
    width: 40px;
    height: 40px;
    background: var(--color-gray-4);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s;
}
.social-links a:hover { background: var(--color-secondary); color: var(--color-main); }
.footer-bottom {
    border-top: 1px solid var(--color-gray-4);
    padding-top: 30px;
    text-align: center;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
    .hero h1 { font-size: 2.5rem; }
    .about-grid, .contact-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .benefits-grid { grid-template-columns: repeat(2, 1fr); }
    .why-us-list { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--color-main);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        border-top: 1px solid var(--color-gray-4);
    }
    nav ul.active { display: flex; }
    .mobile-menu-btn { display: block; }
    .hero { padding: 80px 0; }
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }
    section { padding: 60px 0; }
    .section-title h2 { font-size: 2rem; }
    .services-grid { grid-template-columns: 1fr; }
    .benefits-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}