/* ============================================
   OIA Global - Professional Landing Page
   External Stylesheet
   ============================================ */

/* CSS Variables */
:root {
    --oia-blue: #0056b3;
    --oia-dark-blue: #003d7a;
    --oia-light-blue: #e6f2ff;
    --oia-accent: #00a8e8;
    --white: #ffffff;
    --gray-100: #f8f9fa;
    --gray-600: #666666;
    --gray-800: #333333;
    --dark-bg: #0a1929;
}

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

body {
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
    line-height: 1.6;
    color: var(--gray-800);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 86, 179, 0.1);
    transition: all 0.3s ease;
    padding: 15px 0;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--oia-blue) !important;
    letter-spacing: -1px;
    text-decoration: none;
}

.nav-link {
    font-weight: 500;
    color: var(--gray-800) !important;
    margin: 0 15px;
    position: relative;
    transition: color 0.3s;
    text-decoration: none;
}

.nav-link:hover {
    color: var(--oia-blue) !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--oia-blue);
    transition: width 0.3s;
}

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

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    background: linear-gradient(135deg, var(--oia-blue) 0%, var(--oia-dark-blue) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s 0.2s forwards;
}

.btn-hero {
    background: var(--white);
    color: var(--oia-blue);
    padding: 15px 40px;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    transition: all 0.3s;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s 0.4s forwards;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    background: var(--oia-light-blue);
}

.hero-image {
    position: relative;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
}

.hero-visual {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 60px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-icon-main {
    font-size: 8rem;
    color: rgba(255, 255, 255, 0.9);
}

.hero-icon-box {
    background: rgba(255, 255, 255, 0.2);
    padding: 20px;
    border-radius: 15px;
    color: var(--white);
    font-size: 2rem;
    transition: transform 0.3s;
}

.hero-icon-box:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.3);
}

/* ============================================
   Stats Section
   ============================================ */
.stats-section {
    background: var(--white);
    padding: 80px 0;
    position: relative;
}

.stat-card {
    text-align: center;
    padding: 30px;
    border-radius: 20px;
    transition: all 0.3s;
    background: var(--white);
    box-shadow: 0 5px 20px rgba(0, 86, 179, 0.08);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 86, 179, 0.15);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--oia-blue);
    display: block;
}

.stat-label {
    color: var(--gray-600);
    font-weight: 500;
    margin-top: 10px;
}

/* ============================================
   Brands Section
   ============================================ */
.brands-section {
    background: var(--oia-light-blue);
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--oia-dark-blue);
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-600);
    margin-bottom: 60px;
    font-size: 1.1rem;
}

.brand-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid transparent;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.brand-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--oia-blue), var(--oia-accent));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.brand-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--oia-blue);
    box-shadow: 0 20px 40px rgba(0, 86, 179, 0.15);
}

.brand-card:hover::before {
    transform: scaleX(1);
}

.brand-logo {
    width: 100px;
    height: 100px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--oia-blue), var(--oia-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2.5rem;
    font-weight: 800;
    box-shadow: 0 10px 30px rgba(0, 86, 179, 0.3);
    transition: all 0.3s;
}

.brand-card:hover .brand-logo {
    transform: rotate(360deg) scale(1.1);
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--oia-dark-blue);
    margin-bottom: 15px;
}

.brand-description {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: 20px;
}

.brand-link {
    color: var(--oia-blue);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap 0.3s;
}

.brand-link:hover {
    gap: 10px;
    color: var(--oia-dark-blue);
}

/* ============================================
   About Section
   ============================================ */
.about-section {
    padding: 100px 0;
    background: var(--white);
}

.about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 86, 179, 0.15);
}

.about-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: transform 0.3s;
}

.about-image:hover img {
    transform: scale(1.05);
}

.about-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--oia-dark-blue);
    margin-bottom: 20px;
}

.about-content p {
    color: #555;
    line-height: 1.8;
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin-top: 30px;
}

.feature-list li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--gray-800);
    font-weight: 500;
}

.feature-list li i {
    color: var(--oia-blue);
    font-size: 1.2rem;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
    background: linear-gradient(135deg, var(--oia-dark-blue) 0%, var(--oia-blue) 100%);
    padding: 100px 0;
    color: var(--white);
}

.contact-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-intro {
    opacity: 0.9;
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    transition: all 0.3s;
}

.contact-info-item:hover .contact-icon {
    background: var(--white);
    color: var(--oia-blue);
    transform: rotate(360deg);
}

.contact-details h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    font-weight: 600;
}

.contact-details p {
    margin: 0;
    opacity: 0.9;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    transition: all 0.3s;
    text-decoration: none;
}

.social-links a:hover {
    background: var(--oia-blue);
    transform: translateY(-5px);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.form-title {
    color: var(--oia-dark-blue);
    margin-bottom: 30px;
    font-weight: 700;
}

.form-control {
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    padding: 15px;
    transition: all 0.3s;
    font-size: 1rem;
}

.form-control:focus {
    border-color: var(--oia-blue);
    box-shadow: 0 0 0 0.2rem rgba(0, 86, 179, 0.25);
}

.btn-submit {
    background: var(--oia-blue);
    color: var(--white);
    padding: 15px 40px;
    border-radius: 50px;
    border: none;
    font-weight: 600;
    width: 100%;
    transition: all 0.3s;
    cursor: pointer;
}

.btn-submit:hover {
    background: var(--oia-dark-blue);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 86, 179, 0.3);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-brand {
    font-size: 2rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 20px;
    display: block;
    text-decoration: none;
}

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 25px;
    color: var(--white);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--white);
    transform: translateX(5px);
}

.newsletter-group {
    border-radius: 25px;
    overflow: hidden;
}

.newsletter-input {
    border-radius: 25px 0 0 25px;
    border: none;
    padding: 12px 20px;
}

.btn-newsletter {
    background: var(--oia-blue);
    color: var(--white);
    border: none;
    padding: 0 20px;
    border-radius: 0 25px 25px 0;
    transition: background 0.3s;
}

.btn-newsletter:hover {
    background: var(--oia-accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
    padding-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: var(--white);
}

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

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 991px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-content h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .hero-visual {
        padding: 40px;
        margin-top: 40px;
    }
    
    .hero-icon-main {
        font-size: 5rem;
    }
    
    .contact-form {
        padding: 25px;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.4rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .brand-card {
        padding: 30px 20px;
    }
    
    .brand-logo {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .hero-section,
    .contact-section,
    .footer {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
}