/* ===== CSS RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #0B1426;
    background-color: #FFFFFF;
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.8rem; }
h4 { font-size: 1.4rem; }

p {
    margin-bottom: 1rem;
    font-weight: 300;
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.img-responsive {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #D4AF37, #B8941F);
    color: #FFFFFF;
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #FFFFFF;
    border: 2px solid #FFFFFF;
}

.btn-secondary:hover {
    background: #FFFFFF;
    color: #0B1426;
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.1rem;
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(11, 20, 38, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 1rem 0;
}

.navbar.scrolled {
    background: rgba(11, 20, 38, 0.98);
    padding: 0.5rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    font-weight: 600;
    color: #D4AF37;
    text-decoration: none;
}

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

.nav-link {
    color: #FFFFFF;
    text-decoration: none;
    font-weight: 400;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #D4AF37;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #D4AF37;
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #FFFFFF;
    margin: 3px 0;
    transition: 0.3s;
}

/* ===== HERO SECTION ===== */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #FFFFFF;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../assets/full-exponential-hero.webp') center/cover no-repeat;
    background-attachment: fixed;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(11, 20, 38, 0.7), rgba(11, 20, 38, 0.5));
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 2rem;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 300;
    margin-bottom: 1rem;
    letter-spacing: 2px;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 1.5rem;
    color: #D4AF37;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: #FFFFFF;
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

/* ===== SECTIONS ===== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    color: #0B1426;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #6B7280;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== PILLARS SECTION ===== */
.pillars {
    padding: 6rem 0;
    background: #F8F9FA;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pillar-card {
    background: #FFFFFF;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.pillar-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.pillar-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #D4AF37, #B8941F);
}

.pillar-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #D4AF37, #B8941F);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: 2rem;
    color: #FFFFFF;
}

.pillar-title {
    color: #0B1426;
    margin-bottom: 1rem;
}

.pillar-description {
    color: #6B7280;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.pillar-features {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.feature-tag {
    background: #E5F3FF;
    color: #0B1426;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===== DIFFERENCE SECTION ===== */
.difference {
    padding: 6rem 0;
    background: #FFFFFF;
}

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

.difference-description {
    font-size: 1.2rem;
    color: #6B7280;
    margin-bottom: 2rem;
    line-height: 1.7;
}

.difference-highlights {
    margin-bottom: 2.5rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: #0B1426;
}

.highlight-item i {
    color: #D4AF37;
    margin-right: 1rem;
    font-size: 1.2rem;
}

/* ===== CTA SECTION ===== */
.cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, #0B1426, #1a2b4a);
    color: #FFFFFF;
    text-align: center;
}

.cta-title {
    color: #FFFFFF;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* ===== FOOTER ===== */
.footer {
    background: #0B1426;
    color: #FFFFFF;
    padding: 4rem 0 2rem;
}

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

.footer-title {
    font-family: 'Playfair Display', serif;
    color: #D4AF37;
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.footer-subtitle {
    color: #D4AF37;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-description {
    color: #B0B7C3;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.footer-contact p {
    color: #B0B7C3;
    margin-bottom: 0.5rem;
}

.footer-contact i {
    color: #D4AF37;
    margin-right: 0.5rem;
    width: 20px;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #B0B7C3;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #D4AF37;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    color: #B0B7C3;
}

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

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(11, 20, 38, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .difference-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .pillars-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .cta-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .pillar-card {
        padding: 2rem 1.5rem;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
}


/* Languages Note */
.languages-note {
    font-size: 0.85rem;
    color: #6c757d;
    font-style: italic;
    margin-top: 1rem;
    text-align: center;
}