/* General Styles */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: #fff;
    color: #212529;
}

a {
    color: #0056b3;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Header */
header {
    background-color: #f8f9fa;
    padding: 1rem;
    border-bottom: 1px solid #dee2e6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

header nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

header nav ul li {
    display: inline-block;
    margin-left: 1rem;
}

/* Main Content */
main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    padding: 6rem 0;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.features {
    display: flex;
    justify-content: space-around;
    margin-top: 4rem;
}

.feature {
    width: 30%;
    text-align: center;
    padding: 2rem;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.our-story {
    padding: 4rem 2rem;
    background-color: #f8f9fa;
    margin-top: 4rem;
    text-align: center;
    line-height: 1.6;
}

.our-story p {
    margin-bottom: 1.5rem;
}

.founder-message {
    padding: 4rem 2rem;
    background-color: #fff;
    margin-top: 4rem;
    text-align: center;
}

.message-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.message-content ul {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.message-content ul li {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
    position: relative;
}

.message-content ul li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: #007bff;
}

.cta-button {
    background-color: #007bff;
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    font-size: 1.1rem;
    display: inline-block;
    margin-top: 1rem;
}

.cta-button:hover {
    background-color: #0056b3;
    text-decoration: none;
}

/* Forms */
.login-form, .register-form {
    background-color: #fff;
    padding: 2rem;
    border-radius: 5px;
    max-width: 400px;
    margin: 4rem auto;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 3px;
}

/* Panel */
.sidebar {
    width: 200px;
    float: left;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar ul li a {
    display: block;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid #ddd;
}

.content {
    margin-left: 220px;
}

.email-list {
    list-style: none;
    padding: 0;
}

.email-item {
    display: flex;
    padding: 1rem;
    border-bottom: 1px solid #ddd;
    cursor: pointer;
}

.email-item:hover {
    background-color: #f0f0f0;
}

.email-item.unread {
    font-weight: bold;
}

.email-sender {
    width: 150px;
}

.email-subject {
    flex-grow: 1;
}

.email-date {
    width: 100px;
    text-align: right;
    color: #777;
}

/* Pricing Page */
.pricing-plans {
    text-align: center;
}

.plans-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.plan {
    background-color: #fff;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    width: 300px;
    display: flex;
    flex-direction: column;
}

.plan h3 {
    font-size: 1.75rem;
    margin-top: 0;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 0.5rem 0;
}

.price-period {
    font-size: 1rem;
    font-weight: normal;
    color: #777;
}

.plan ul {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
    flex-grow: 1;
}

.plan ul li {
    margin-bottom: 0.75rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
    background-color: #fff;
    border-top: 1px solid #ddd;
}

/* Responsive Styles */
@media (max-width: 768px) {
    header {
        flex-direction: column;
    }

    header nav ul li {
        display: block;
        margin: 0.5rem 0;
    }

    .features {
        flex-direction: column;
    }

    .feature {
        width: 100%;
        margin-bottom: 2rem;
    }

    .sidebar {
        width: 100%;
        float: none;
    }

    .content {
        margin-left: 0;
    }

    .email-item {
        flex-direction: column;
    }

    .email-sender,
    .email-date {
        width: 100%;
        text-align: left;
    }

    .plans-container {
        flex-direction: column;
    }
}