/* ==========================================
   ARENYXPHARMA Brand Identity
   Colors: Deep Navy #0A2540, Teal #00B4A8
   Typography: Space Grotesk (Technical), Inter (Body)
   ========================================== */

/* CSS Variables - Brand Colors */
:root {
    /* Primary Brand Colors */
    --color-navy-primary: #0A2540;
    --color-navy-dark: #051728;
    --color-navy-light: #15385F;
    
    /* Teal Accent */
    --color-teal-primary: #00B4A8;
    --color-teal-light: #33C7BD;
    --color-teal-dark: #008F86;
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-gray-100: #F8F9FA;
    --color-gray-200: #E9ECEF;
    --color-gray-300: #DEE2E6;
    --color-gray-400: #CED4DA;
    --color-gray-500: #ADB5BD;
    --color-gray-600: #6C757D;
    --color-gray-700: #495057;
    --color-gray-800: #343A40;
    --color-gray-900: #212529;
    
    /* Typography */
    --font-heading: 'Space Grotesk', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-gray-900);
    line-height: 1.6;
    background-color: var(--color-white);
    overflow-x: hidden;
}

/* Skip Link (Accessibility) */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-navy-primary);
    color: var(--color-white);
    padding: 8px 16px;
    text-decoration: none;
    z-index: 10000;
}

.skip-link:focus {
    top: 0;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-navy-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--color-gray-700);
}

a {
    color: var(--color-teal-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-teal-dark);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--color-teal-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 180, 168, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-navy-primary);
    border: 2px solid var(--color-navy-primary);
}

.btn-secondary:hover {
    background: var(--color-navy-primary);
    color: var(--color-white);
}

/* Header - Sticky Navigation */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.site-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.logo img {
    height: 42px;
    width: auto;
    display: block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--color-navy-primary);
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-menu a:not(.btn-primary):hover {
    color: var(--color-teal-primary);
}

.nav-menu a:not(.btn-primary)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-teal-primary);
    transition: width var(--transition-normal);
}

.nav-menu a:not(.btn-primary):hover::after,
.nav-menu a:not(.btn-primary).active::after {
    width: 100%;
}

.nav-menu .btn-primary {
    padding: 10px 24px;
    font-size: 0.9rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger {
    width: 28px;
    height: 3px;
    background: var(--color-navy-primary);
    transition: all var(--transition-normal);
    border-radius: 2px;
}

/* Hero Section */
.hero-section {
    padding: 180px 0 100px;
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-white) 100%);
    position: relative;
}

.hero-content {
    max-width: 900px;
    text-align: center;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    color: var(--color-navy-primary);
    margin-bottom: 1.5rem;
    line-height: 1.15;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-700);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Statistics Section */
.stats-section {
    padding: 80px 0;
    background: var(--color-white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat-card {
    background: var(--color-white);
    padding: 2.5rem 1.5rem;
    text-align: center;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card i {
    font-size: 2.5rem;
    color: var(--color-teal-primary);
    margin-bottom: 1rem;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-navy-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--color-gray-600);
    font-weight: 500;
}

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

.section-header h2 {
    font-size: 2.75rem;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.25rem;
    color: var(--color-gray-600);
}

.section-header.light h2,
.section-header.light p {
    color: var(--color-white);
}

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

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.about-card {
    background: var(--color-white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform var(--transition-normal);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.about-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-teal-primary), var(--color-teal-light));
    border-radius: 50%;
}

.about-icon i {
    font-size: 2rem;
    color: var(--color-white);
}

.about-card h3 {
    margin-bottom: 1rem;
    color: var(--color-navy-primary);
}

/* Technology Section */
.technology-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-navy-dark) 0%, var(--color-navy-primary) 100%);
    color: var(--color-white);
}

.technology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.tech-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.tech-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.tech-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-teal-primary);
    margin-bottom: 1rem;
}

.tech-card h3 {
    color: var(--color-white);
    margin-bottom: 1rem;
}

.tech-card p {
    color: rgba(255, 255, 255, 0.8);
}

/* Pipeline Section */
.pipeline-section {
    padding: 100px 0;
    background: var(--color-white);
}

.pipeline-stages {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
}

.stage {
    padding: 12px 24px;
    background: var(--color-gray-200);
    border-radius: 25px;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-gray-600);
    transition: all var(--transition-normal);
}

.stage.active {
    background: var(--color-teal-primary);
    color: var(--color-white);
}

.pipeline-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.pipeline-card {
    background: var(--color-gray-100);
    padding: 2.5rem;
    border-radius: 12px;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.pipeline-card:hover {
    border-color: var(--color-teal-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 180, 168, 0.15);
}

.pipeline-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-teal-primary);
    color: var(--color-white);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.pipeline-card h3 {
    margin-bottom: 0.5rem;
}

.pipeline-indication {
    font-weight: 600;
    color: var(--color-navy-primary);
    margin-bottom: 1rem;
}

.pipeline-meta {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--color-gray-600);
}

.pipeline-meta i {
    color: var(--color-teal-primary);
    margin-right: 0.5rem;
}

/* Impact Section */
.impact-section {
    padding: 100px 0;
    background: var(--color-gray-100);
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.impact-card {
    background: var(--color-white);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: all var(--transition-normal);
}

.impact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.impact-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-navy-primary), var(--color-navy-light));
    border-radius: 50%;
}

.impact-icon i {
    font-size: 2rem;
    color: var(--color-white);
}

.impact-card h3 {
    margin-bottom: 1rem;
}

.impact-stat {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--color-gray-100);
    border-radius: 8px;
    font-weight: 600;
    color: var(--color-teal-primary);
    font-size: 1.1rem;
}

/* Contact Section */
.contact-section {
    padding: 100px 0;
    background: var(--color-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-card {
    background: var(--color-gray-100);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-teal-primary);
    border-radius: 50%;
}

.contact-icon i {
    font-size: 1.5rem;
    color: var(--color-white);
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.contact-card p {
    margin: 0;
}

.contact-card a {
    color: var(--color-navy-primary);
    word-break: break-word;
}

.contact-card a:hover {
    color: var(--color-teal-primary);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--color-gray-100);
    padding: 3rem;
    border-radius: 12px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    color: var(--color-navy-primary);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    border: 2px solid var(--color-gray-300);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

.contact-form button {
    width: 100%;
    margin-top: 1rem;
}

/* Footer */
.site-footer {
    background: linear-gradient(135deg, var(--color-navy-dark) 0%, var(--color-navy-primary) 100%);
    color: var(--color-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    filter: brightness(0) invert(1);
    margin-bottom: 1.5rem;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    color: var(--color-white);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 0.75rem;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* Scroll to Top Button */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-teal-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--color-teal-dark);
    transform: translateY(-3px);
}

.scroll-top i {
    font-size: 1.25rem;
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}