:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --accent: #06b6d4;
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-700: #334155;
    --gray-500: #64748b;
    --gray-300: #cbd5e1;
    --gray-100: #f1f5f9;
    --gray-50: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--gray-900);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: var(--gray-100);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 18px;
    padding-bottom: 18px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    font-weight: 800;
    font-size: 22px;
}

.logo-mark {
    background: var(--gradient);
    color: white;
    padding: 6px 10px;
    border-radius: 8px;
    letter-spacing: -0.5px;
}

.logo-text {
    color: var(--dark);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s;
}

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

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: 8px;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: 0.3s;
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: white;
    color: var(--dark);
    border: 2px solid var(--gray-300);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-full {
    width: 100%;
}

/* Hero */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, #f0f9ff 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(37,99,235,0.1);
    color: var(--primary);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--dark);
    margin-bottom: 20px;
    letter-spacing: -1.5px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 19px;
    color: var(--gray-500);
    margin-bottom: 36px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
}

.stat h3 {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat p {
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 500;
}

.hero-visual {
    position: relative;
    height: 500px;
}

.hero-blob {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: var(--gradient);
    border-radius: 50%;
    opacity: 0.15;
    filter: blur(40px);
}

.floating-card {
    position: absolute;
    background: white;
    padding: 18px 22px;
    border-radius: 14px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 14px;
    animation: float 6s ease-in-out infinite;
}

.floating-card strong {
    display: block;
    font-size: 15px;
    color: var(--dark);
    margin-bottom: 2px;
}

.floating-card p {
    font-size: 13px;
    color: var(--gray-500);
}

.card-icon {
    width: 44px;
    height: 44px;
    background: var(--gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.card-1 {
    top: 30px;
    left: 0;
}

.card-2 {
    top: 50%;
    right: 0;
    animation-delay: 2s;
}

.card-3 {
    bottom: 40px;
    left: 40px;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Sections */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(37,99,235,0.1);
    color: var(--primary);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-tag.light {
    background: rgba(255,255,255,0.15);
    color: white;
}

.section-header h2,
.about-content h2,
.contact-info h2 {
    font-size: 44px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -1px;
    line-height: 1.15;
}

.section-header p {
    font-size: 18px;
    color: var(--gray-500);
}

/* Services */
.services {
    background: var(--gray-50);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: white;
    padding: 36px 32px;
    border-radius: 16px;
    transition: all 0.3s ease;
    border: 1px solid var(--gray-100);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 22px;
}

.service-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--gray-500);
    font-size: 15px;
    line-height: 1.65;
}

/* About */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    position: relative;
    height: 480px;
}

.about-image {
    width: 100%;
    height: 100%;
    background: var(--gradient);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.about-grid-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 30px 30px;
}

.about-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 280px;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    backdrop-filter: blur(20px);
}

.about-circle::before {
    content: 'IEB';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 72px;
    font-weight: 800;
    letter-spacing: -3px;
}

.about-content p {
    color: var(--gray-500);
    font-size: 16px;
    margin-bottom: 18px;
    line-height: 1.7;
}

.about-features {
    margin-top: 32px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    color: var(--gray-700);
}

.check {
    width: 24px;
    height: 24px;
    background: var(--gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    flex-shrink: 0;
}

/* Why Us */
.why-us {
    background: var(--gray-50);
}

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

.why-card {
    background: white;
    padding: 36px 28px;
    border-radius: 16px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--gray-100);
}

.why-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.why-number {
    font-size: 42px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: -2px;
}

.why-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.why-card p {
    color: var(--gray-500);
    font-size: 14px;
    line-height: 1.6;
}

/* Contact */
.contact {
    background: var(--dark);
    color: white;
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37,99,235,0.2) 0%, transparent 70%);
    border-radius: 50%;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    position: relative;
}

.contact-info h2 {
    color: white;
}

.contact-info > p {
    color: var(--gray-300);
    font-size: 17px;
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    font-size: 14px;
    color: var(--gray-300);
    margin-bottom: 2px;
    font-weight: 500;
}

.contact-item p {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    color: var(--dark);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--gray-300);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s;
    background: var(--gray-50);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-status {
    margin-top: 16px;
    font-size: 14px;
    text-align: center;
    color: var(--primary);
    font-weight: 500;
}

/* Footer */
.footer {
    background: #0a0f1e;
    color: var(--gray-300);
    padding: 70px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 50px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-brand p {
    color: var(--gray-500);
    font-size: 14px;
    line-height: 1.6;
    max-width: 320px;
}

.footer-links h4 {
    color: white;
    font-size: 15px;
    margin-bottom: 18px;
    font-weight: 600;
}

.footer-links a {
    display: block;
    color: var(--gray-500);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 10px;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.08);
    text-align: center;
    font-size: 13px;
    color: var(--gray-500);
}

/* Responsive */
@media (max-width: 968px) {
    .hero h1 { font-size: 42px; }
    .section-header h2,
    .about-content h2,
    .contact-info h2 { font-size: 34px; }
    .hero-content,
    .about-container,
    .contact-container { grid-template-columns: 1fr; gap: 50px; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-container { grid-template-columns: 1fr 1fr; gap: 32px; }
    .hero-visual { height: 380px; }
}

@media (max-width: 640px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }
    .nav-links.active { transform: translateY(0); }
    .mobile-toggle { display: flex; }
    .hero { padding: 110px 0 60px; }
    .hero h1 { font-size: 34px; }
    .hero-subtitle { font-size: 16px; }
    .hero-stats { gap: 28px; }
    .stat h3 { font-size: 28px; }
    section { padding: 70px 0; }
    .services-grid,
    .why-grid,
    .about-features { grid-template-columns: 1fr; }
    .footer-container { grid-template-columns: 1fr; }
    .contact-form { padding: 28px; }
    .hero-visual { height: 320px; }
    .floating-card { padding: 14px 16px; }
    .floating-card strong { font-size: 14px; }
    .floating-card p { font-size: 12px; }
}