/* =========================================
   CSS Variables & Design System
   ========================================= */
:root {
    /* Colors based on RACS identity */
    --clr-bg: #ffffff;
    --clr-bg-alt: #f4f6f8;
    --clr-primary: #1C87A0;
    --clr-primary-hover: #156d82;
    --clr-text: #2c3338;
    --clr-text-muted: #5a656d;
    --clr-border: rgba(0, 0, 0, 0.1);

    /* Elegant UI effects */
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.05);
    --glass-shadow: 0 4px 24px 0 rgba(0, 0, 0, 0.04);

    /* Typography */
    --font-main: 'Inter', sans-serif;

    /* Spacing */
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 8rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section-padding {
    padding: var(--space-2xl) 0;
}

/* =========================================
   Typography
   ========================================= */
h1,
h2,
h3,
h4 {
    line-height: 1.2;
    font-weight: 800;
    margin-bottom: var(--space-md);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    letter-spacing: -0.02em;
}

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

h3 {
    font-size: 1.5rem;
}

p {
    color: var(--clr-text-muted);
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
}

/* =========================================
   Buttons & Links
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-primary {
    background-color: var(--clr-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--clr-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(28, 135, 160, 0.2);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--clr-border);
    color: var(--clr-text);
}

.btn-outline:hover {
    border-color: var(--clr-text);
    background-color: var(--glass-bg);
}

.btn-secondary {
    background-color: var(--glass-bg);
    border-color: var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.link-arrow {
    color: var(--clr-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.link-arrow:hover {
    gap: 0.75rem;
}

/* =========================================
   Header & Navigation
   ========================================= */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all var(--transition-smooth);
    padding: var(--space-md) 0;
}

header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--clr-border);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.desktop-nav ul {
    display: flex;
    gap: var(--space-lg);
}

.desktop-nav a {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--clr-text-muted);
}

.desktop-nav a:hover {
    color: var(--clr-text);
}

.header-cta {
    display: flex;
    gap: var(--space-sm);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--clr-text);
    transition: var(--transition-fast);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background-color: var(--clr-bg);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-smooth);
}

.mobile-nav-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-nav ul {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-nav a {
    font-size: 1.5rem;
    font-weight: 600;
}

.mobile-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--space-2xl);
    overflow: hidden;
}

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

.hero h1 {
    color: var(--clr-text);
}

.hero p {
    font-size: clamp(1.125rem, 2vw, 1.25rem);
    max-width: 600px;
    margin-bottom: var(--space-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Decorative Blobs */
.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 1;
    opacity: 0.5;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: rgba(28, 135, 160, 0.1);
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: rgba(0, 0, 0, 0.03);
    bottom: 10%;
    left: -50px;
}

/* =========================================
   Cards & Grids
   ========================================= */
.glass-card {
    background: #ffffff;
    border: 1px solid var(--clr-border);
    border-radius: 12px;
    padding: var(--space-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    transition: transform var(--transition-smooth), box-shadow var(--transition-fast);
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.grid {
    display: grid;
    gap: var(--space-lg);
}

.features-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    margin-top: var(--space-xl);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    color: var(--clr-primary);
}

/* =========================================
   News Section
   ========================================= */
.dark-section {
    background-color: var(--clr-bg-alt);
    border-top: 1px solid var(--clr-border);
    border-bottom: 1px solid var(--clr-border);
}

.news .section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.news-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.news-card {
    background: var(--clr-bg);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--clr-border);
    transition: transform var(--transition-fast);
}

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

.news-image {
    width: 100%;
    height: 200px;
    background-color: #2a2b32;
    position: relative;
}

/* Placeholder patterns for images */
.placeholder-img-1 {
    background: linear-gradient(45deg, #e0e5ec, #f4f6f8);
}

.placeholder-img-2 {
    background: linear-gradient(135deg, #f4f6f8, #e0e5ec);
}

.news-content {
    padding: var(--space-lg);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(28, 135, 160, 0.1);
    color: var(--clr-primary);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

/* =========================================
   Newsletter
   ========================================= */
.newsletter-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-lg);
    padding: var(--space-xl);
}

.newsletter-text {
    flex: 1;
    min-width: 300px;
}

.newsletter-form {
    display: flex;
    gap: var(--space-sm);
    flex: 1;
    min-width: 300px;
}

.newsletter-form input {
    flex: 1;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--clr-border);
    background: #f4f6f8;
    color: var(--clr-text);
    font-family: var(--font-main);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--clr-primary);
}

/* =========================================
   Footer
   ========================================= */
footer {
    padding-top: var(--space-xl);
    background-color: #000;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.footer-brand p {
    margin-top: var(--space-md);
    max-width: 300px;
    color: var(--glass-bg);
}

.footer-brand .logo-text {
    color: var(--glass-bg);
}

.footer-links h4 {
    color: #fff;
    margin-bottom: var(--space-md);
}

.footer-links li {
    margin-bottom: var(--space-sm);
    color: var(--glass-bg);
}

.footer-links a {
    color: var(--glass-bg);
}

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

.footer-bottom {
    padding: var(--space-md) 0;
    border-top: 1px solid var(--clr-border);
    text-align: center;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.875rem;
}

/* =========================================
   Animations (Triggered via JS)
   ========================================= */
.fade-in {
    opacity: 0;
    transition: opacity 0.8s ease;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.delay-1 {
    transition-delay: 0.2s;
}

.delay-2 {
    transition-delay: 0.4s;
}

/* =========================================
   Media Queries
   ========================================= */
@media (max-width: 900px) {

    .desktop-nav,
    .header-cta {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .newsletter-form {
        flex-direction: column;
    }
}