:root {
    --bg-black: #0f0f0f;
    --bg-darker: #0c0c0c;
    --text-white: #ffffff;
    --text-grey: #a1a1aa;
    --border-color: #27272a;
    --nav-height: 90px;
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--bg-black);
}

body {
    background-color: var(--bg-black);
    color: var(--text-grey);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    cursor: pointer;
    padding: 0.5rem;
}
.mobile-menu-btn svg {
    width: 28px;
    height: 28px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-white);
    letter-spacing: -0.03em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-links li a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-grey);
    position: relative;
}

.nav-links li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -4px;
    left: 50%;
    background-color: var(--text-white);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-links li a:hover {
    color: var(--text-white);
}

.nav-links li a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    padding-top: var(--nav-height);
}

/* Split screen layout */
.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 5%;
    max-width: 50%;
}

.hero-image-wrapper {
    flex: 1;
    position: relative;
    max-width: 50%;
    overflow: hidden;
}

/* This gradient creates the smooth blend into the deep black background */
.hero-image-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, var(--bg-black) 0%, transparent 30%),
                linear-gradient(to top, var(--bg-black) 0%, transparent 15%);
    pointer-events: none;
    z-index: 2;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: brightness(0.85) contrast(1.1);
    opacity: 0;
    transform-origin: center;
    animation: subtleImageFade 1.2s ease-out forwards, kenBurns 20s ease-out 1.2s infinite alternate;
}

/* Hero Text Styling */
.headline {
    font-size: clamp(3.5rem, 5vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin-bottom: 1rem;
    animation: fadeSlideUp 0.8s ease-out forwards;
}

.sub-headline {
    font-size: clamp(1.5rem, 2vw, 2rem);
    font-weight: 500;
    color: var(--text-grey);
    margin-bottom: 2.2rem;
    opacity: 0;
    animation: fadeSlideUp 0.8s ease-out 0.2s forwards;
}

.body-text {
    font-size: 1.125rem;
    max-width: 90%;
    margin-bottom: 3.5rem;
    opacity: 0;
    animation: fadeSlideUp 0.8s ease-out 0.2s forwards;
}

/* Stats */
.stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 3.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 2.5rem;
    opacity: 0;
    animation: fadeSlideUp 0.8s ease-out 0.4s forwards;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.2;
    margin-bottom: 0.35rem;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-grey);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* CTA Button */
.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--text-white);
    color: var(--bg-black);
    padding: 1.1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.05rem;
    align-self: flex-start;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    opacity: 0;
    animation: fadeSlideUp 0.8s ease-out 0.6s forwards;
}

.cta-button:hover {
    background-color: var(--bg-black);
    color: var(--text-white);
    border-color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.05);
}

.cta-button .arrow {
    margin-left: 0.75rem;
    font-size: 1.2rem;
    transition: transform 0.3s ease-in-out;
}

.cta-button:hover .arrow {
    transform: translateX(8px);
}

/* Placeholder Sections */
.placeholder-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-color);
}

.placeholder-section h2 {
    font-size: 3rem;
    color: var(--text-grey);
    opacity: 0.15;
}

/* Responsive Layout */
@media (max-width: 1024px) {
    .headline {
        font-size: 3.5rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }
    .nav-links {
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background-color: var(--bg-black);
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        gap: 2rem;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-200%);
        transition: transform 0.3s ease-in-out;
        z-index: -1;
    }
    .nav-links.active {
        transform: translateY(0);
    }
    
    .hero {
        flex-direction: column;
    }
    
    .hero-content, .hero-image-wrapper {
        max-width: 100%;
        flex: none;
    }
    
    .hero-content {
        padding: 4rem 5%;
    }
    
    .hero-image-wrapper {
        height: 50vh;
    }
    
    .stats {
        flex-direction: column;
        gap: 1.5rem;
    }
}

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

@keyframes kenBurns {
    0% {
        transform: scale(1);
    }
    100% {
        transform: scale(1.15);
    }
}

@keyframes subtleImageFade {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* --- Light Mode Sections (The Crisis & One Mission) --- */
.light-section {
    background-color: #FAFAFA;
    padding: 6rem 5% 8rem;
    color: #4a4a4a;
}

.light-section .section-heading {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 800;
    color: #111111;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.light-section .intro-text {
    font-size: 1.15rem;
    max-width: 800px;
    margin-bottom: 4rem;
    line-height: 1.6;
}

/* The Silent Crisis Layout */
.crisis-layout {
    display: flex;
    gap: 4rem;
    align-items: center;
}

.crisis-image-wrapper {
    flex: 1;
    border-radius: 12px;
    overflow: hidden;
}

.crisis-image {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    aspect-ratio: 4/5;
}

.crisis-data {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.data-card {
    background-color: #F5F5F5;
    padding: 2.5rem;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #E5E5E5;
}

.data-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.06);
}

.data-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 1rem;
}

.data-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: #111111;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.data-label {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* One Mission Section */
.mission-section {
    padding-top: 6rem;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.module-card {
    background-color: #F5F5F5;
    padding: 2.5rem;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #E5E5E5;
}

.module-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.06);
}

.module-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.4rem 1rem;
    border: 1px solid #111111;
    border-radius: 50px;
    color: #111111;
    margin-bottom: 2rem;
}

.module-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #111111;
    margin-bottom: 1rem;
}

.module-desc {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.module-bullets {
    list-style: none;
    font-size: 0.9rem;
}

.module-bullets li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

.module-bullets li::before {
    content: '\2192'; /* right arrow */
    position: absolute;
    left: 0;
    color: #111111;
    font-weight: bold;
}

/* --- Scroll Animations --- */
.reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal-up.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* Delays for staggered elements */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.5s; }
.delay-4 { transition-delay: 0.7s; }

/* Responsive adjustments for light section */
@media (max-width: 1024px) {
    .crisis-layout { flex-direction: column; }
    .crisis-image-wrapper { width: 100%; max-width: 600px; margin: 0 auto; aspect-ratio: 16/9; }
    .crisis-data { width: 100%; }
    .modules-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .crisis-data { grid-template-columns: 1fr; }
    .modules-grid { grid-template-columns: 1fr; }
}