:root {
    --primary-color: #00a254;
    --secondary-color: #4a90e2;
    --accent-color: #28a745;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-color: #6c757d;
    --error-color: #dc3545;
    --border-radius: 5px;
    --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f5f7fa;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e9ecef;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 2.2rem;
    margin-bottom: 5px;
}

.logo p {
    color: var(--gray-color);
    font-size: 1rem;
}

main {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 30px;
    margin-bottom: 30px;
}

section {
    margin-bottom: 20px;
}

h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

h3 {
    color: var(--dark-color);
    margin: 20px 0 15px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

input, select {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ced4da;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.25);
}

.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    padding: 10px 20px;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: var(--border-radius);
    transition: all 0.15s ease-in-out;
    cursor: pointer;
}

.primary-btn {
    color: white;
    background-color: var(--primary-color);
}

.primary-btn:hover {
    background-color: #00773d;
}

.secondary-btn {
    color: white;
    background-color: var(--gray-color);
}

.secondary-btn:hover {
    background-color: #5a6268;
}

.hidden-section {
    display: none;
}

.active-section {
    display: block;
}

.message-field {
    margin-top: 15px;
    font-weight: 500;
}

.error-message {
    color: var(--error-color) !important;
}

.customer-info {
    background-color: var(--light-color);
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.plans-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.plan-card {
    border: 1px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.plan-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.plan-card h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.plan-price {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 10px 0;
    color: var(--dark-color);
}

.plan-features {
    list-style: none;
    margin: 15px 0;
}

.plan-features li {
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.plan-features li:before {
    content: "✓";
    color: var(--accent-color);
    position: absolute;
    left: 0;
}

.download-examples {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #e9ecef;
}

.download-examples h5 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.download-examples ul {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

.download-examples li {
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: var(--dark-color);
    display: flex;
    align-items: center;
}

.download-examples li:before {
    content: "⏱";
    margin-right: 8px;
    color: var(--secondary-color);
}

.feature-section {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #e9ecef;
}

.feature-section h5 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.feature-section p {
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.best-for-section ul {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

.best-for-section li {
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: var(--dark-color);
    display: flex;
    align-items: center;
}

.best-for-section li:before {
    content: "✅";
    margin-right: 8px;
}

.devices-section {
    background-color: rgba(74, 144, 226, 0.1);
    padding: 10px;
    border-radius: var(--border-radius);
}

.work-section {
    background-color: rgba(0, 162, 84, 0.1);
    padding: 10px;
    border-radius: var(--border-radius);
}

.button-spacer {
    flex-grow: 1;
    min-height: 20px;
}

.upgrade-btn i {
    margin-right: 8px;
}

.upgrade-btn {
    width: 100%;
    color: white;
    background-color: var(--accent-color);
    border: none;
    padding: 15px 10px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    font-size: 1.05rem;
    margin-top: auto;
}

.upgrade-btn:hover {
    background-color: #218838;
}

.confirmation-message {
    text-align: center;
    padding: 30px 0;
}

.confirmation-message i {
    font-size: 4rem;
    color: var(--accent-color);
    margin-bottom: 20px;
}

#confirmation-details {
    background-color: var(--light-color);
    padding: 15px;
    border-radius: var(--border-radius);
    margin: 20px auto;
    max-width: 400px;
}

footer {
    text-align: center;
    color: var(--gray-color);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .plans-container {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 10px;
    }
    
    main {
        padding: 20px;
    }
}

.logo-img {
    height: 300px;
    width: auto;
    margin-left: auto;
    margin-right: auto;
    display: block;
    max-width: 100%;
}

.center {
    text-align: center;
}

.info-list {
    list-style: square;
    margin-left: 15px;
    font-weight: 500;
}

.confirmation-dialog {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    z-index: 100;
    width: 90%;
    max-width: 500px;
    text-align: center;
}

.confirmation-dialog h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

.confirmation-dialog p {
    margin-bottom: 15px;
}

.confirmation-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 25px;
}

.confirmation-dialog::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0);
    z-index: -1;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.static-estate {
    padding: 10px 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--dark-color);
    margin-bottom: 8px;
}