:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --danger-color: #e74c3c;
    --text-color: #333;
    --bg-color: #f9f9f9;
    --border-color: #ddd;
}

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

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    height: 80px;
    margin-bottom: 15px;
}

.btn {
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
}

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

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

.btn-secondary {
    background-color: #7f8c8d;
    color: white;
}

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

#email-display {
    margin-top: 20px;
    display: flex;
    gap: 10px;
    align-items: center;
}

#email-addr {
    flex-grow: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.inbox {
    margin-top: 40px;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.email-item {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.email-item:last-child {
    border-bottom: none;
}

.email-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
}

.sender {
    font-weight: bold;
}

.date {
    color: #7f8c8d;
    font-size: 0.9em;
}

.subject {
    color: var(--primary-color);
    margin: 5px 0;
}

.preview {
    color: #666;
    font-size: 0.9em;
}

.hidden {
    display: none !important;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top: 4px solid var(--primary-color);
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error {
    color: var(--danger-color);
    padding: 10px;
    margin-top: 20px;
    text-align: center;
}

footer {
    margin-top: 40px;
    text-align: center;
    color: #7f8c8d;
    font-size: 0.9em;
}