body {
    margin: 0;
    padding: 0;
    font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    font-size: 15px;
    color: #2c3e50;
    background: #fafafa;
    line-height: 1.6;
    text-rendering: optimizelegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    min-height: 100vh;
    box-shadow: 0 2px 4px -1px rgba(0, 0, 0, 0.2), 0 4px 5px 0 rgba(0, 0, 0, 0.14), 0 1px 10px 0 rgba(0, 0, 0, 0.12);
}

header {
    background: linear-gradient(135deg, #00585f 0%, rgba(0, 88, 95, 0.8) 100%);
    color: white;
    padding: 24px;
}

header h1 {
    margin: 0;
    font-size: 24px;
    font-weight: 500;
}

main {
    padding: 30px;
}

.settings-section {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.12);
}

.settings-section:last-child {
    border-bottom: none;
}

.settings-section h2 {
    margin: 0 0 20px;
    font-size: 20px;
    font-weight: 500;
    color: #00585f;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: rgba(0, 0, 0, 0.87);
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid rgba(0, 0, 0, 0.38);
    border-radius: 4px;
    font-size: 15px;
    background: white;
    box-sizing: border-box;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-control:hover {
    border-color: rgba(0, 0, 0, 0.87);
}

.form-control:focus {
    outline: none;
    border-color: #00585f;
    border-width: 2px;
    padding: 11px 13px;
}

.help-text {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: rgba(0, 0, 0, 0.6);
}

.btn {
    padding: 8px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: none;
    letter-spacing: 0.025em;
    min-height: 36px;
    box-shadow: 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 2px 2px 0 rgba(0, 0, 0, 0.14), 0 1px 5px 0 rgba(0, 0, 0, 0.12);
}

.btn:hover {
    box-shadow: 0 2px 4px -1px rgba(0, 0, 0, 0.2), 0 4px 5px 0 rgba(0, 0, 0, 0.14), 0 1px 10px 0 rgba(0, 0, 0, 0.12);
}

.btn-primary {
    background: #00585f;
    color: white;
}

.btn-primary:hover {
    background: #006064;
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    box-shadow: none;
}

.btn-secondary {
    background: #424242;
    color: white;
}

.btn-secondary:hover {
    background: #303030;
}

.hidden {
    display: none !important;
}

.auth-info {
    background: #fafafa;
    padding: 16px;
    border-radius: 4px;
    margin-bottom: 15px;
    border: 1px solid rgba(0, 0, 0, 0.12);
}

.auth-info p {
    margin: 5px 0;
    color: rgba(0, 0, 0, 0.87);
}

.auth-info strong {
    color: #00585f;
    font-weight: 600;
}

.message {
    padding: 12px 15px;
    border-radius: 4px;
    margin-top: 20px;
    animation: slideIn 0.3s ease-out;
}

.message.success {
    background: #E8F5E9;
    color: #1B5E20;
    border: 1px solid #26A69A;
}

.message.error {
    background: #FFEBEE;
    color: #B71C1C;
    border: 1px solid #B00020;
}

.message.info {
    background: #E0F7FA;
    color: #00585f;
    border: 1px solid #00838F;
}

@keyframes slideIn {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}