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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f0f4f8;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, #07c160, #06ad56);
    padding: 15px 30px;
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo span {
    color: #ffd700;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 25px;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #07c160, #1a1a2e);
    color: #fff;
    text-align: center;
    padding: 80px 20px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons .btn {
    margin: 5px 10px;
}

.btn {
    display: inline-block;
    padding: 14px 35px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.btn-primary {
    background: #fff;
    color: #07c160;
}

.btn-primary:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

/* Section */
.section {
    padding: 60px 20px;
    text-align: center;
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: #07c160;
}

/* Version */
.version-info {
    background: #fff;
    border-radius: 20px;
    margin: 30px auto;
    max-width: 800px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    padding: 40px;
}

.device-detect {
    margin-top: 15px;
    padding: 10px;
    background: #e8f5e9;
    border-radius: 10px;
    font-weight: 500;
}

/* QR */
.qr-section {
    background: #fff;
}

.qr-wrapper {
    display: inline-block;
    padding: 20px;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.qr-code {
    width: 200px;
    height: 200px;
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.card {
    background: #fff;
    border-radius: 20px;
    padding: 30px 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.card h3 {
    margin-bottom: 10px;
    color: #07c160;
}

/* Steps */
.steps {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

.step {
    background: #fff;
    border-radius: 20px;
    padding: 25px;
    flex: 1 1 200px;
    max-width: 300px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    display: flex;
    align-items: flex-start;
    gap: 15px;
    text-align: left;
}

.step-num {
    background: #07c160;
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.faq-item {
    background: #fff;
    border-radius: 15px;
    margin-bottom: 15px;
    padding: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    cursor: pointer;
}

.faq-question {
    font-weight: 600;
    color: #07c160;
    margin-bottom: 5px;
}

.faq-answer {
    display: none;
    padding-top: 10px;
    border-top: 1px solid #e0e0e0;
    color: #555;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Footer */
footer {
    background: #1a1a2e;
    color: #ccc;
    text-align: center;
    padding: 30px 20px;
    margin-top: 40px;
}

footer a {
    color: #07c160;
    text-decoration: none;
}

/* Admin */
.admin-page {
    background: #f5f7fa;
}

.admin-container {
    max-width: 900px;
    margin: 30px auto;
    background: #fff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.admin-form fieldset {
    border: 1px solid #ddd;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 25px;
}

.admin-form legend {
    font-weight: 600;
    color: #07c160;
    padding: 0 10px;
}

.admin-form label {
    display: block;
    margin-bottom: 15px;
}

.admin-form input[type="text"],
.admin-form input[type="url"],
.admin-form input[type="password"],
.admin-form textarea {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 10px;
    font-size: 1rem;
    margin-top: 5px;
}

.admin-form textarea {
    min-height: 60px;
}

.admin-form .group {
    background: #f9f9f9;
    padding: 15px;
    border-radius: 12px;
    margin-bottom: 15px;
}

.error {
    color: #e74c3c;
    margin-top: 10px;
}

.success {
    color: #07c160;
    margin-bottom: 15px;
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        background: #06ad56;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        padding: 20px;
        gap: 15px;
    }

    .nav-links.active {
        display: flex;
    }

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

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

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

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .step {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 50px 15px;
    }

    .btn {
        padding: 12px 25px;
        font-size: 0.9rem;
    }
}