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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: #1a1a2e;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    padding: 0.8rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a1a2e;
}

.logo span {
    color: #0066cc;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lang-btn {
    background: #f0f0f5;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.lang-btn:hover {
    background: #e0e0ea;
}

.nav-cta {
    background: #0066cc;
    color: white;
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: background 0.2s;
}

.nav-cta:hover {
    background: #0052a3;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #0066cc 0%, #004d99 50%, #1a1a2e 100%);
    color: white;
    padding: 6rem 2rem 4rem;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url('https://images.unsplash.com/photo-1631217868264-e5b90bb7e133?w=1920&h=1080&fit=crop') center/cover;
    opacity: 0.15;
}

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

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    opacity: 0.9;
    margin-bottom: 2.5rem;
    font-weight: 400;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: white;
    color: #0066cc;
}

.btn-primary:hover {
    background: #f0f7ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.section-light .btn-primary {
    background: #0066cc;
    color: white;
}

.section-light .btn-primary:hover {
    background: #0052a3;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 102, 204, 0.3);
}

.btn-donate {
    background: #0066cc;
    color: white;
    font-size: 1.1rem;
    padding: 1rem 2.5rem;
}

.btn-donate:hover {
    background: #0052a3;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 102, 204, 0.3);
}

/* ===== Sections ===== */
.section {
    padding: 6rem 2rem;
}

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

.section h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.section-light {
    background: #ffffff;
}

.section-dark {
    background: #f8f9fc;
}

.section-accent {
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f0fe 100%);
}

/* ===== Cards (Problem Section) ===== */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: #f8f9fc;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.card p {
    color: #555;
    line-height: 1.7;
}

/* ===== Mission Section ===== */
.mission-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.mission-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    color: #444;
    line-height: 1.8;
}

.mission-image img {
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

/* ===== Features (Platform Section) ===== */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.feature {
    padding: 1.5rem 0;
}

.feature-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0066cc;
    opacity: 0.3;
    margin-bottom: 0.5rem;
}

.feature h3 {
    font-size: 1.15rem;
    margin-bottom: 0.6rem;
    font-weight: 600;
}

.feature p {
    color: #555;
    line-height: 1.7;
}

.cta-center {
    text-align: center;
}

/* ===== Current Scope Section ===== */
.current-scope {
    margin-top: 4rem;
    background: linear-gradient(135deg, #f0f7ff 0%, #e8f0fe 100%);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid rgba(0, 102, 204, 0.12);
}

.scope-badge {
    display: inline-block;
    background: #0066cc;
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.current-scope h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1a1a2e;
}

.current-scope p {
    color: #444;
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto 2rem;
}

.scope-roadmap {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.roadmap-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
}

.roadmap-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.roadmap-item.active .roadmap-dot {
    background: #0066cc;
}

.roadmap-item.active {
    color: #0066cc;
    font-weight: 600;
}

.roadmap-item.planned .roadmap-dot {
    background: #ccc;
}

.roadmap-item.planned {
    color: #888;
}

/* ===== Support Section ===== */
.support-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.support-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    color: #444;
    line-height: 1.8;
}

.support-card {
    background: white;
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.support-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.support-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

/* ===== Contact Section ===== */
.contact-box {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-box h2 {
    margin-bottom: 1rem;
}

.contact-box p {
    color: #555;
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.btn-contact {
    background: #1a1a2e;
    color: white;
    font-size: 1rem;
    padding: 0.9rem 2rem;
}

.btn-contact:hover {
    background: #2a2a4e;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* ===== Footer ===== */
.footer {
    background: #1a1a2e;
    color: white;
    padding: 3rem 2rem 1.5rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    margin-bottom: 2rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
}

.footer-logo span {
    color: #4d9fff;
}

.footer-content > p {
    color: #aaa;
    max-width: 500px;
    margin: 0 auto 1.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: #4d9fff;
    font-weight: 500;
    transition: color 0.2s;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: #777;
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .mission-content,
    .support-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .mission-image {
        order: -1;
    }

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

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

    .section {
        padding: 4rem 1.5rem;
    }

    .hero {
        padding: 5rem 1.5rem 3rem;
    }
}

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

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.card, .feature, .support-card {
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }

.feature:nth-child(1) { animation-delay: 0.1s; }
.feature:nth-child(2) { animation-delay: 0.2s; }
.feature:nth-child(3) { animation-delay: 0.3s; }
.feature:nth-child(4) { animation-delay: 0.4s; }