body.dark-bg {
    background: linear-gradient(120deg, #181c24 0%, #232a36 100%);
    min-height: 100vh;
    color: #fff;
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
}

.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 3vw 0 3vw;
    position: relative;
    z-index: 10;
}
.logo {
    display: flex;
    align-items: center;
}
.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}
.header-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.7rem 1.6rem;
    border: none;
    border-radius: 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}
.btn-primary {
    background: #ff4e50;
    color: #fff;
}
.btn-primary:hover {
    background: #f9d423;
    color: #222;
}
.btn-secondary {
    background: #2bb3b1;
    color: #fff;
}
.btn-secondary:hover {
    background: #fff;
    color: #2bb3b1;
}

.main-hero {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    min-height: 80vh;
    padding: 2vw 3vw 0 3vw;
    gap: 2vw;
}

.hero-left {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 480px;
    z-index: 2;
}
.hero-title-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
}
.hero-title-box h1 {
    font-size: 2.8rem;
    color: #fff;
    margin: 0;
}
.subtitle {
    background: rgba(36, 40, 50, 0.7);
    border-radius: 0.7rem;
    padding: 0.3rem 1rem;
    font-size: 1.1rem;
    color: #f9d423;
    margin-left: 0.5rem;
}
.icon-fire {
    font-size: 2.2rem;
    margin-left: 0.7rem;
}
.hero-description {
    font-size: 1.1rem;
    color: #e0e0e0;
    margin-bottom: 2.5rem;
    line-height: 1.6;
}
.download-buttons {
    display: flex;
    gap: 1.5rem;
    margin-top: 1.5rem;
}
.download-btn {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    background: #232a36;
    color: #fff;
    border-radius: 1.2rem;
    padding: 0.7rem 1.3rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    box-shadow: 0 2px 12px rgba(36,40,50,0.15);
    transition: background 0.2s, color 0.2s;
}
.download-btn.android {
    background: #2bb3b1;
}
.download-btn.ios {
    background: #fff;
    color: #232a36;
}
.download-btn:hover {
    background: #f9d423;
    color: #232a36;
}
.download-btn .icon {
    font-size: 2rem;
}

.hero-center {
    flex: 1.5;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 600px;
}
.app-images-group {
    position: relative;
    width: 480px;
    height: 740px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.app-image {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 220px;
    height: 440px;
    object-fit: contain;
    border-radius: 2.2rem;
    box-shadow: 0 8px 48px 0 rgba(255,78,80,0.18), 0 2px 12px rgba(36,40,50,0.15);
    background: #232a36;
    transition: box-shadow 0.2s, transform 0.2s;
}
.app-image-main {
    z-index: 3;
    width: 300px;
    height: 600px;
    transform: translate(-50%, -50%) rotate(0deg);
}
.app-image-130 {
    z-index: 2;
    transform: translate(-50%, -50%) rotate(-35deg);
    left: 5%;
    opacity: 0.92;
}
.app-image-160 {
    z-index: 1;
    transform: translate(-50%, -50%) rotate(20deg);
    left: 95%;
    opacity: 0.92;
}

/* Elementos 3D/flutuantes (placeholders) */
.floating-cube, .floating-cube.cube2 {
    position: absolute;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #ff4e50 60%, #f9d423 100%);
    border-radius: 1.2rem;
    box-shadow: 0 8px 32px rgba(255,78,80,0.18);
    z-index: 1;
    opacity: 0.8;
    top: 10%;
    left: 60%;
    transform: rotate(18deg);
}
.floating-cube.cube2 {
    width: 90px;
    height: 90px;
    top: 60%;
    left: 80%;
    background: linear-gradient(135deg, #232a36 60%, #f9d423 100%);
    opacity: 0.7;
    transform: rotate(-12deg);
}
.floating-circle {
    position: absolute;
    width: 60px;
    height: 60px;
    background: #f9d423;
    border-radius: 50%;
    top: 20%;
    left: 80%;
    z-index: 1;
    opacity: 0.7;
}
.floating-rocket {
    position: absolute;
    top: 5%;
    left: 90%;
    font-size: 2.5rem;
    z-index: 2;
}

/* Avatares flutuantes (placeholders) */
.avatar {
    position: absolute;
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 2px 12px rgba(36,40,50,0.15);
    background: #232a36 url('../images/Previewed_message.png') center/cover no-repeat;
}
.avatar1 {
    width: 60px; height: 60px; left: 80%; top: 70%;
}
.avatar2 {
    width: 50px; height: 50px; left: 60%; top: 80%;
    background-image: url('../images/Previewed_video_chat.png');
}
.avatar3 {
    width: 40px; height: 40px; left: 90%; top: 50%;
}

@media (max-width: 1100px) {
    .app-images-group {
        width: 90vw;
        height: 60vw;
        min-width: 180px;
        min-height: 320px;
    }
    .app-image {
        width: 18vw;
        height: 36vw;
        min-width: 90px;
        min-height: 180px;
    }
    .app-image-main {
        width: 26vw;
        height: 52vw;
        min-width: 140px;
        min-height: 280px;
    }
}
@media (max-width: 900px) {
    .main-hero {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
        padding: 2vw 2vw 0 2vw;
    }
    .hero-left {
        max-width: 100%;
        padding: 0 1vw 0 1vw;
        align-items: center;
        text-align: center;
    }
    .app-images-group {
        margin-top: 1.2rem;
    }
}
@media (max-width: 600px) {
    .main-hero {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        padding: 2vw 1vw 0 1vw;
    }
    .hero-left {
        max-width: 100%;
        padding: 0 0.5vw 0 0.5vw;
        align-items: center;
        text-align: center;
    }
    .app-images-group {
        margin-top: 0.7rem;
    }
    .app-image-130, .app-image-160 {
        display: none;
    }
}

.footer {
    background: linear-gradient(135deg, #232a36 0%, #181c24 100%);
    color: #fff;
    padding: 3rem 2rem 2rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    max-width: 1200px;
    margin: 0 auto;
    gap: 2rem;
}
.footer-section {
    flex: 1;
    min-width: 200px;
}
.footer-section h3 {
    color: #f9d423;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}
.footer-section p {
    color: #e0e0e0;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.5;
}
.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}
.social-link {
    color: #e0e0e0;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.social-link:hover {
    color: #f9d423;
}
.social-link .material-icons {
    font-size: 1.2rem;
    color: inherit;
}
@media (max-width: 700px) {
    .footer {
        padding: 2rem 1rem 1.5rem 1rem;
        margin-top: 2rem;
    }
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    .footer-section {
        min-width: auto;
    }
    .social-links {
        align-items: center;
    }
} 

/* Contact Popup Styles */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}
.popup-content {
    background: linear-gradient(135deg, #232a36 0%, #181c24 100%);
    border-radius: 1.5rem;
    padding: 2rem;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(255,78,80,0.2);
    border: 1px solid rgba(255,255,255,0.1);
}
.popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.popup-header h2 {
    color: #f9d423;
    margin: 0;
    font-size: 1.5rem;
}
.close-btn {
    background: none;
    border: none;
    color: #e0e0e0;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: background 0.2s;
}
.close-btn:hover {
    background: rgba(255,255,255,0.1);
}
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.form-group label {
    color: #f9d423;
    font-weight: 600;
    font-size: 0.95rem;
}
.form-group input,
.form-group textarea {
    padding: 0.8rem;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 0.8rem;
    background: rgba(255,255,255,0.05);
    color: #fff;
    font-size: 1rem;
    transition: border-color 0.2s;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #f9d423;
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}
.submit-btn {
    background: linear-gradient(135deg, #ff4e50 0%, #f9d423 100%);
    color: #fff;
    border: none;
    padding: 1rem 2rem;
    border-radius: 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
    margin-top: 1rem;
}
.submit-btn:hover {
    transform: translateY(-2px);
}
@media (max-width: 600px) {
    .popup-content {
        padding: 1.5rem;
        width: 95%;
    }
    .popup-header h2 {
        font-size: 1.3rem;
    }
}