/* ============================================
   LBN International Trade - Antigravity Design System
   Modern, Fluide, Minimaliste
   ============================================ */

/* CSS Variables - Antigravity Theme */
:root {
    /* Primary Colors - Professional Blue Palette */
    --color-navy: #0F1C2E;
    --color-navy-light: #1A2942;
    --color-navy-lighter: #2A3F5F;

    /* Neutral Colors - Clean & Minimal */
    --color-white: #FFFFFF;
    --color-light-grey: #F8F9FA;
    --color-grey-100: #F1F3F5;
    --color-grey-200: #E9ECEF;
    --color-grey-300: #DEE2E6;
    --color-grey-400: #CED4DA;
    --color-grey-500: #ADB5BD;
    --color-grey-600: #6C757D;
    --color-grey-700: #495057;
    --color-grey-800: #343A40;

    /* Accent Color - Vibrant Blue for CTAs */
    --color-accent: #2D5BFF;
    --color-accent-hover: #1E47E6;
    --color-accent-light: #5B7FFF;

    /* Typography */
    --font-sans: 'Inter', 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;

    /* Spacing Scale - Generous whitespace */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 3rem;
    --space-10: 4rem;
    --space-12: 5rem;
    --space-16: 7rem;
    --space-20: 10rem;

    /* Transitions - Smooth & Fluid */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows - Subtle */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --radius-full: 9999px;

    /* Container */
    --container-max: 1200px;
    --container-wide: 1400px;
}

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

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

body {
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--color-grey-700);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
    list-style: none;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-navy);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.text-accent {
    color: var(--color-accent);
}

/* Layout */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-wide {
    max-width: var(--container-wide);
}

section {
    padding: var(--space-16) 0;
}

section.light-bg {
    background-color: var(--color-light-grey);
}

/* Buttons - Modern & Minimal */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-6);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(45, 91, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-navy);
    border-color: var(--color-navy);
}

.btn-secondary:hover {
    background: var(--color-navy);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-outline-white {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
    background: var(--color-white);
    color: var(--color-navy);
    border-color: var(--color-white);
}

.btn-lg {
    padding: var(--space-5) var(--space-8);
    font-size: 1.125rem;
}

/* Navigation - Glassmorphism */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-5) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: var(--space-4) 0;
    box-shadow: var(--shadow-sm);
}

.navbar.scrolled .nav-logo {
    color: var(--color-navy);
}

.navbar.scrolled .nav-menu a {
    color: var(--color-grey-700);
}

.navbar.scrolled .nav-menu a:hover {
    color: var(--color-accent);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-menu a {
    color: var(--color-white);
    font-size: 0.9375rem;
    font-weight: 500;
    opacity: 0.9;
    transition: all var(--transition-fast);
}

.nav-menu a:hover {
    opacity: 1;
    color: var(--color-accent-light);
}

/* Hero Section - Clean & Impactful */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-light) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('assets/hero_abstract_connections.png') center center / cover no-repeat;
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: var(--space-8);
}

.hero-tagline {
    font-size: 0.9375rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent-light);
    margin-bottom: var(--space-3);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--space-5);
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.4s forwards;
}

.hero-subtitle {
    color: rgba(255, 255, 255, 0.85);
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 400;
    max-width: 700px;
    margin: 0 auto var(--space-8);
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.6s forwards;
}

.hero-cta {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.8s forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Services Section - Dual Cards */
.services-section {
    background: var(--color-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-subtitle {
    color: var(--color-grey-600);
    font-size: 1.125rem;
    margin-top: var(--space-4);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 450px), 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-10);
}

.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-grey-200);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

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

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

.service-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    border-radius: var(--radius-md);
    color: var(--color-white);
    margin-bottom: var(--space-5);
    font-size: 1.75rem;
}

.service-card h3 {
    margin-bottom: var(--space-3);
    color: var(--color-navy);
}

.service-card p {
    color: var(--color-grey-600);
    line-height: 1.7;
    margin-bottom: var(--space-5);
}

.back-to-home {
    text-align: center;
    margin-top: var(--space-8);
}

.back-to-home a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-grey-600);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.back-to-home a:hover {
    color: var(--color-accent);
    transform: translateX(-4px);
}

/* Offers Section - 2 Cards */
.offers-section {
    background: var(--color-light-grey);
}

.offers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 500px), 1fr));
    gap: var(--space-8);
}

.offer-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.offer-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.offer-card .offer-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.offer-card h3 {
    margin-bottom: var(--space-4);
}

.offer-card .offer-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--space-3);
}

.offer-card .offer-description {
    color: var(--color-grey-600);
    margin-bottom: var(--space-5);
    line-height: 1.7;
}

.offer-card ul {
    margin-bottom: var(--space-6);
}

.offer-card li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
    color: var(--color-grey-700);
}

.offer-card li::before {
    content: '✓';
    color: var(--color-accent);
    font-weight: 700;
    flex-shrink: 0;
}

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

.contact-form {
    max-width: 700px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--color-navy);
    font-weight: 500;
    font-size: 0.9375rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-4);
    border: 1px solid var(--color-grey-300);
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(45, 91, 255, 0.1);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* Resources Section */
.resources-section {
    background: var(--color-light-grey);
}

.resource-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    max-width: 500px;
    margin: 0 auto;
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.resource-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: 1.5rem;
}

/* Footer */
.footer {
    background: var(--color-navy);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-10) 0 var(--space-6);
}

.footer-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
    text-align: center;
}

.footer a {
    color: var(--color-white);
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--color-accent-light);
}

/* Responsive Design */
@media (max-width: 768px) {
    section {
        padding: var(--space-10) 0;
    }

    .services-grid,
    .offers-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .nav-menu {
        display: none;
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scope Section - Simplified */
.scope-content {
    max-width: 700px;
    margin: 0 auto var(--space-12);
    padding: var(--space-10);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.scope-content h3 {
    color: var(--color-navy);
    margin-bottom: var(--space-6);
    font-size: 1.5rem;
}

.scope-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
    text-align: left;
}

.scope-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    color: var(--color-grey-700);
    font-size: 1rem;
}

.scope-list li::before {
    content: '✓';
    color: var(--color-accent);
    font-weight: 700;
    flex-shrink: 0;
}

.scope-visual {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-8);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    text-align: center;
}

.scope-visual h4 {
    margin-bottom: var(--space-6);
    color: var(--color-grey-600);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.value-chain {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.chain-step {
    padding: var(--space-3) var(--space-5);
    background: var(--color-grey-100);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-grey-600);
}

.chain-step.highlight {
    background: var(--color-accent);
    color: var(--color-white);
    font-weight: 600;
}

.chain-arrow {
    color: var(--color-grey-300);
    font-size: 1.25rem;
}