body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    position: relative;
    overflow-x: hidden;
}

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

.header {
    background-color: #ffffff;
    padding: 10px 0;
    width: 100%;
    position: relative;
    z-index: 100;
    border-bottom: 1px solid #e5e7eb;
}

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

.logo { 
    display: flex; 
    align-items: center; gap: 8px; 
    font-weight: 600; font-size: 18px; 
    color: #1f2937; 
}

.logo-img {
     width: 200px; 
     height: auto; 
     object-fit: contain; 
    }

.nav { 
    display: flex; 
    gap: 32px; 
    flex: 1; 
    justify-content: center; 
}

.nav a { 
    color: #4b5563; 
    text-decoration: none; 
    font-size: 15px; transition: 
    color 0.3s; 
}

.nav a:hover {
    color: #10B981; 
}

.header-buttons {
    display: flex;
    gap: 12px;
}

.btn-register {
    background-color: #0f172a;
    color: #ffffff;
    border: none;
    padding: 10px 24px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-register:hover {
    background-color: #1e293b;
}

.btn-login {
    background-color: #10B981;
    color: #ffffff;
    border: none;
    padding: 10px 24px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-login:hover {
    background-color: #059669;
}

.hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    min-height: calc(100vh - 64px);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-text {
    flex: 1;
    max-width: 550px;
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 16px;
    color: #ffffff;
}

.subtitle {
    font-size: 32px;
    font-weight: 600;
    color: #10B981;
    margin-bottom: 24px;
}

.description {
    font-size: 16px;
    line-height: 1.6;
    color: #cbd5e1;
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-explore {
    background-color: #10B981;
    color: #ffffff;
    border: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-explore:hover {
    background-color: #059669;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}

.btn-community {
    background-color: transparent;
    color: #ffffff;
    border: 2px solid #334155;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-community:hover {
    border-color: #10B981;
    background-color: rgba(16, 185, 129, 0.1);
    transform: translateY(-2px);
}

.hero-image {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.earth {
    width: 400px;
    height: 400px;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 20px 60px rgba(59, 130, 246, 0.4));
}

.earth-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    animation: rotate 60s linear infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 968px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-text h1 {
        font-size: 42px;
    }

    .subtitle {
        font-size: 26px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .earth {
        width: 320px;
        height: 320px;
    }
}

@media (max-width: 640px) {
    .nav {
        display: none;
    }

    .header-buttons {
        gap: 8px;
    }

    .btn-register,
    .btn-login {
        padding: 8px 16px;
        font-size: 13px;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .subtitle {
        font-size: 22px;
    }

    .description {
        font-size: 14px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn-explore,
    .btn-community {
        width: 100%;
    }

    .earth {
        width: 280px;
        height: 280px;
    }
}

.auth-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
}

.user-greeting {
    color: #4b5563;
    font-size: 14px;
    font-weight: 500;
    margin-right: 5px;
}

.btn {
    padding: 8px 18px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: #059669;
    color: white;
    border: 1px solid #059669;
}

.btn-primary:hover {
    background-color: #047857;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(5, 150, 105, 0.3);
}

.btn-secondary {
    background-color: #0f172a;
    color: #ffffff;
    border: none;
}

.btn-secondary:hover {
    background-color: #1e293b;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.2);
}

.logo a {
    display: flex;
    align-items: center;
}

.breadcrumb-nav {
    background-color: #f9fafb;
    border-bottom: 1px solid #e5e7eb;
    padding: 12px 0;
}

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

.breadcrumb-list {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.breadcrumb-item {
    font-size: 14px;
    color: #6b7280;
}

.breadcrumb-item a {
    color: #059669;
    text-decoration: none;
    transition: color 0.2s;
}

.breadcrumb-item a:hover {
    color: #047857;
    text-decoration: underline;
}

.breadcrumb-item.active {
    color: #1f2937;
    font-weight: 600;
}

.breadcrumb-separator {
    margin: 0 8px;
    color: #9ca3af;
    font-size: 14px;
}