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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #e0e0e0;
    background: #0f0f0f;
}

/* Navbar */
nav {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid rgba(0, 212, 255, 0.2);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #00d4ff;
    letter-spacing: 1px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

nav a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #00d4ff;
}

.btn-login {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    color: #0f0f0f;
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 212, 255, 0.4);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0f3460 0%, #16213e 100%);
    color: white;
    padding: 6rem 2rem;
    text-align: center;
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: slideIn 0.8s ease;
    color: #00d4ff;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: slideIn 0.8s ease 0.2s both;
    color: #cbd5e0;
}

.hero .cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: slideIn 0.8s ease 0.4s both;
}

.btn-primary {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    color: #0f0f0f;
    padding: 1rem 2.5rem;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #00d4ff;
    padding: 1rem 2.5rem;
    border: 2px solid #00d4ff;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #00d4ff;
    color: #0f0f0f;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Features Section */
.features {
    padding: 4rem 2rem;
    background: #1a1a2e;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #00d4ff;
    font-weight: 600;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 212, 255, 0.2);
    border-color: rgba(0, 212, 255, 0.5);
}

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

.feature-card h3 {
    margin-bottom: 1rem;
    color: #00d4ff;
    font-weight: 600;
}

.feature-card p {
    color: #cbd5e0;
    line-height: 1.8;
}

/* Demo Section */
.demo {
    padding: 4rem 2rem;
    background: #0f0f0f;
}

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

.demo-subtitle {
    text-align: center;
    color: #a0aec0;
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.demo-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.demo-profile {
    background: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.2);
    border: 1px solid rgba(0, 212, 255, 0.3);
    max-width: 500px;
    width: 100%;
}

.demo-profile-header {
    background: rgba(0, 212, 255, 0.1);
    padding: 3rem 2rem;
    text-align: center;
    border-bottom: 1px solid rgba(0, 212, 255, 0.2);
}

.demo-profile-avatar {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.demo-profile-name {
    font-size: 1.8rem;
    font-weight: bold;
    color: #00d4ff;
    margin-bottom: 0.5rem;
}

.demo-profile-username {
    color: #a0aec0;
    margin-bottom: 1rem;
}

.demo-profile-bio {
    color: #cbd5e0;
    font-size: 0.95rem;
    line-height: 1.5;
}

.demo-links-section {
    padding: 2rem;
}

.demo-links-section h3 {
    color: #00d4ff;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.demo-links-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.demo-link-card {
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.demo-link-card:hover {
    background: rgba(0, 212, 255, 0.15);
    border-color: rgba(0, 212, 255, 0.5);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 212, 255, 0.2);
}

.demo-link-icon {
    font-size: 2rem;
}

.demo-link-title {
    color: #00d4ff;
    font-weight: bold;
    font-size: 0.95rem;
}

.demo-link-description {
    color: #a0aec0;
    font-size: 0.8rem;
}

/* Plans Section */
.plans {
    padding: 4rem 2rem;
    background: #0f0f0f;
}

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

.current-plan {
    background: linear-gradient(135deg, #0f3460 0%, #16213e 100%);
    border: 1px solid rgba(0, 212, 255, 0.25);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    display: grid;
    gap: 0.4rem;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.15);
}

.current-plan-label {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.75rem;
    color: #a0aec0;
}

.current-plan-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #00d4ff;
}

.current-plan-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    color: #cbd5e0;
    font-size: 0.95rem;
}

.current-plan.current-plan-loaded {
    border-color: #00d4ff;
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.payment-provider {
    margin: 1rem 0 1.5rem;
    display: flex;
    gap: 0.75rem;
    align-items: center;
    color: #cbd5e0;
    font-weight: 600;
}

.payment-provider select {
    background: #0f0f0f;
    color: #e0e0e0;
    border: 1px solid rgba(0, 212, 255, 0.35);
    border-radius: 8px;
    padding: 8px 10px;
}

.plan-note {
    margin-top: 1rem;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    border: 1px dashed rgba(0, 212, 255, 0.3);
    color: #a0aec0;
    background: rgba(15, 52, 96, 0.35);
    font-size: 0.95rem;
}

.plan-card {
    background: linear-gradient(135deg, #16213e 0%, #0f3460 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 12px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.plan-card.featured {
    border-color: #00d4ff;
    transform: scale(1.05);
    box-shadow: 0 20px 50px rgba(0, 212, 255, 0.3);
}

.plan-card.featured .badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    color: #0f0f0f;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.plan-card:hover {
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.2);
}

.plan-name {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 1rem 0;
    color: #00d4ff;
}

.plan-price {
    font-size: 3rem;
    color: #00d4ff;
    font-weight: bold;
    margin: 1rem 0;
}

.plan-price span {
    font-size: 1rem;
    color: #a0aec0;
}

.plan-features {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.plan-features li {
    padding: 0.8rem 0;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    color: #cbd5e0;
}

.plan-features li:last-child {
    border-bottom: none;
}

.plan-features li:before {
    content: "✓ ";
    color: #00d4ff;
    font-weight: bold;
    margin-right: 0.5rem;
}

.plan-btn {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    color: #0f0f0f;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    margin-top: 1.5rem;
    transition: all 0.3s ease;
}

.plan-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 212, 255, 0.4);
}

.plan-card.featured .plan-btn {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
}

/* About Section */
.about {
    padding: 4rem 2rem;
    background: #1a1a2e;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: #00d4ff;
    font-weight: 600;
}

.about-text p {
    margin-bottom: 1rem;
    color: #cbd5e0;
    line-height: 1.8;
}

.about-image {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    height: 300px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0f0f0f;
    font-size: 3rem;
    box-shadow: 0 10px 35px rgba(0, 212, 255, 0.3);
}

/* Footer */
footer {
    background: linear-gradient(135deg, #0f0f0f 0%, #1a1a2e 100%);
    color: #cbd5e0;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(0, 212, 255, 0.2);
}

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

footer a {
    color: #00d4ff;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .plan-card.featured {
        transform: scale(1);
    }
}

    .hero .cta-buttons {
        flex-direction: column;
    }

    nav ul {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .plan-card.featured {
        transform: scale(1);
    }
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    nav {
        padding: 1rem;
    }

    nav .container {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    nav ul {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .btn-login {
        padding: 0.4rem 1rem;
        font-size: 0.9rem;
    }

    /* Hero Section */
    .hero {
        padding: 4rem 1.5rem;
    }

    .hero h1 {
        font-size: 2.2rem;
        margin-bottom: 1rem;
    }

    .hero p {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 1rem;
    }

    .cta-buttons button,
    .cta-buttons a {
        width: 100%;
        padding: 0.8rem;
    }

    /* Features Section */
    .features {
        padding: 3rem 1.5rem;
    }

    .features h2 {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .feature-card {
        padding: 1.5rem;
    }

    .feature-icon {
        font-size: 2rem;
    }

    /* Pricing Section */
    .pricing {
        padding: 3rem 1.5rem;
    }

    .pricing h2 {
        font-size: 2rem;
    }

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

    .plan-card {
        padding: 1.5rem;
    }

    /* About Section */
    .about {
        padding: 3rem 1.5rem;
    }

    .about h2 {
        font-size: 2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-text h3 {
        font-size: 1.3rem;
    }

    /* Footer */
    footer {
        padding: 2rem 1.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    footer h3 {
        font-size: 1.1rem;
    }

    footer p,
    footer a {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    nav {
        padding: 0.8rem;
    }

    nav .container {
        gap: 0.8rem;
    }

    .logo {
        font-size: 1rem;
    }

    nav ul {
        gap: 0.8rem;
        font-size: 0.8rem;
    }

    .btn-login {
        padding: 0.35rem 0.8rem;
        font-size: 0.8rem;
    }

    /* Hero Section */
    .hero {
        padding: 3rem 1rem;
    }

    .hero h1 {
        font-size: 1.8rem;
        margin-bottom: 0.8rem;
    }

    .hero p {
        font-size: 0.95rem;
        margin-bottom: 1.2rem;
    }

    .cta-buttons {
        gap: 0.8rem;
    }

    .cta-buttons button,
    .cta-buttons a {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    /* Features Section */
    .features {
        padding: 2rem 1rem;
    }

    .features h2 {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .features-grid {
        gap: 1.5rem;
    }

    .feature-card {
        padding: 1rem;
    }

    .feature-icon {
        font-size: 1.8rem;
        margin-bottom: 0.8rem;
    }

    .feature-card h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }

    .feature-card p {
        font-size: 0.85rem;
    }

    /* Pricing Section */
    .pricing {
        padding: 2rem 1rem;
    }

    .pricing h2 {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .plan-card {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .plan-card h3 {
        font-size: 1.1rem;
    }

    .plan-card .price {
        font-size: 1.8rem;
    }

    .plan-feature {
        font-size: 0.85rem;
        padding: 0.4rem 0;
    }

    .btn-choose {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    /* About Section */
    .about {
        padding: 2rem 1rem;
    }

    .about h2 {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .about-content {
        gap: 1.5rem;
    }

    .about-text h3 {
        font-size: 1.1rem;
    }

    .about-text p {
        font-size: 0.85rem;
    }

    .about-image {
        font-size: 3rem;
    }

    /* Footer */
    footer {
        padding: 1.5rem 1rem;
    }

    .footer-content {
        gap: 1.5rem;
    }

    footer h3 {
        font-size: 1rem;
        margin-bottom: 0.8rem;
    }

    footer p,
    footer a {
        font-size: 0.8rem;
    }

    footer a {
        display: block;
        margin-bottom: 0.5rem;
    }

    .footer-bottom {
        font-size: 0.8rem;
        margin-top: 1rem;
    }
}